aat3608 data sheet - Skyworks Solutions, Inc.

DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
General Description
Features
The AAT3608 is a member of Skyworks' Total Power
Management IC (TPMIC™) product family. It contains a
single-cell lithium ion/polymer battery charger, two
800mA switching regulators, and five low dropout (LDO)
regulators in a small Pb-free 40-pin 5mmx5mm TQFN
package, making it ideal for portable space-constrained
systems. The single-input linear charger powers up from
an adapter or a USB port. The adapter charge current is
programmable with an external resistor or pin selectable
between 100mA and 500mA when connected to a USB
port. The device integrates a load switch for dynamic
power path and features deep sleep mode operation. The
step-down regulators are monolithic synchronous converters integrating the compensation network and soft
start circuitry. The 1.5MHz operating frequency enables
the use of tiny 2.2μH inductors and small 4.7μF output
capacitors. External resistors set the output voltage for
Buck 1 and Buck 2; the output voltage of Buck 2 is
dynamically adjustable with I2C. The LDO regulators feature 3% output voltage accuracy over the full operating
temperature range. The fast control loop of the LDO
regulators also provide excellent transient response with
a typical output voltage deviation of 1.5%. The AAT3608
provides protection features to safeguard from overtemperature operation, over-current operation, and a
digital thermal loop to protect the battery during battery
charging. The device is rated over an ambient temperature range of -40°C to 85°C.
• 2.7V to 5.5V Operating Input Voltage Range
• Adapter or USB Single Input Linear Charger
• Battery Charger Digital Thermal Regulation
• Battery Temperature Monitoring
• Battery Charger Includes Programmable Timer
• Input Load Switch
• Dual 800mA Monolithic Switching Converters
▪ 1.5MHz Switching Frequencies
▪ 95% Efficiency
▪ Independent Input Power and Ground
▪ Buck1 Output Programmable With External
Resistors
Buck
2 Feedback Voltage is Dynamically Adjustable
▪
between 0.5V and 0.7V with I2C Interface
• Five Channel LDO Regulators
▪ 300mA, Output Adjustable via Two Logic Inputs
▪ 80mA, Output Adjustable via I2C Interface
▪ 50mA, 2.5V Output Voltage
▪ 50mA, 3.3V Output Voltage
▪ 80mA with 1.2V Fixed Output
▪ 3% Accuracy and 1.5% Typical Transient Accuracy
• Very Low Shutdown Current
• Power-On Push Button
• Status Outputs
▪ Interrupt, Reset and Status Pins, Low Battery Flag
• Separate Enable Pin for LDO2, LDO4, LDO5, and
Buck2 (when mask is removed)
• Over-Current and Over-Thermal Protection
• 5mmx5mm, 40-Pin TQFN Package
Applications
•GPS
• Handheld Devices
• Mobile Media Players
•MP3
• Portable Navigation
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
1
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Application Circuit
2
B AT
B AT
PWR_ON
PWR_HOLD
PWR_EN
SDA
AAT3608
SCL
TS
PBSTAS
INT
STAT
LBO
LBI
RESET
ISETA
CT
SYSOUT
C2
CSYSOUT
L1
Buck 1
R2
FB1
C8
R3
PGND
PGND1
PGND2
Buck 2
R4
C10
R5
L2
LX2
FB2
PGND2
C12
PWR_IN
C1
SYSOUT
SYSOUT
INBUCK
INLDO
INLDO
LX1
PGND1
R6
PWR_ID
USBSEL
S2
S1
EXT_ON
GND
C3
VBAT
PWR_IN
VIN
LDO1
LDO2
LDO3
LDO4
LDO1
LDO2
LDO3
LDO4
LDO5
LDO5
C13
C14
C15
C16
C17
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Pin Descriptions
Pin #
Symbol
1
STAT
2
ISETA
3
TS
4
CT
5
6
7
8
9
10
11
LDO2
INLDO
LDO3
LDO1
INLDO
LDO4
LDO5
12
PBSTAS
13
RESET
14
INT
15
Function
LBO
Open drain (pull-down) output for battery charging status.
Input pin for charge current programming for the adapter. Connect a 1.24kΩ resistor to get 800mA of charging current. Can be
used to monitor charging current.
Battery temperature sense pin with 75μA output current. Connect the battery’s NTC 10kΩ resistor from this pin to ground.
A Beta range of 3300 to 4000 will place the typical charging temperature between -4°C and 48°C.
Charger safety timer pin. A 0.1μF ceramic capacitor should be connected between this pin and GND. Connect directly to GND to
disable the timer function.
Output for LDO2 regulator.
Input power for LDO regulators.
Output for LDO3 regulator.
Output for LDO1 regulator.
Input power for LDO regulators.
Output for LDO4 regulator.
Output for LDO5 regulator.
Open drain (pull-down) output for PWR_ON status. When PWR_ON is high, PBSTAS will be low (after the debounce time). When
PWR_ON is low, PBSTAS will be high (or equal to the voltage to which that external pull-up resistor is connected).
Open drain (pull-down) active-low output for reset. After Buck2 is OK, there is a delay of 200ms before RESET goes High. RESET
pin is low in shutdown.
Open drain (pull-down) active-low output for interrupt. When any of the I2C read bits (except the DS_RDY and PWR_DS bits)
change state this pin will pull low. It will be released again after a read from the I2C is complete.
Open drain (pull-down) active-low output for low-battery comparator. When the battery is low, LBO will pull down.
16
LBI
Feedback input for low-battery comparator. The LBI threshold is 1.0V.
17
18
19
GND
S2
S1
20
PWR_EN
21
22
23
24
25
26
27
28, 29
FB2
PGND2
LX2
INBUCK
LX1
PGND1
FB1
BAT
30
SDA
I2C serial data pin.
31
SCL
I2C serial clock pin.
32
PWR_HOLD
33
PWR_ON
34
EXT_ON
35, 36
37
38, 39
SYSOUT
PWR_ID
PWR_IN
40
USBSEL
EP
EP
Ground.
S1 and S2 bits set the output voltage for LDO1.
S1 and S2 bits set the output voltage for LDO1.
Enable for LDO2, LDO4, and LDO5 for default condition. Buck2 can also be controlled by PWR_EN only if the SOC masks
PWR_EN through I2C, refer to the "I2C Serial Interface and Programmability" section of this datasheet for additional information.
Feedback input for Buck2 regulator.
Power ground for Buck2 regulator.
Switching node for Buck2 regulator.
Input power for Buck regulators.
Switching node for Buck1 regulator.
Power ground for Buck1 regulator.
Feedback input for Buck1 regulator.
Input for lithium-ion battery.
Enable for the system. PWR_HOLD must be held high by the processor to keep system turned on. To shut down the device, the
microcontroller should pull PWR_HOLD to ground.
Enable for the system. Connect a push-button from this pin to BAT to activate system. It is debounced for 320ms.
Alternate system enable; may be used by the RTC alarm or other system input. This pin's function is similar to PWR_ON; it has a
similar 320ms debounce but does not affect the PBSTAS pin.
System output. Connect to the INLDO and INBUCK input supply pins.
Logic input to identify the source of PWR_IN.
Power Input. System input from adapter or USB.
Logic input to select 500mA current limit and fast charge current (USBSEL=H) or 100mA current limit and fast charge
(USBSEL=L). An internal pull-down resistor is connected to this pin. If is left floating,USBSEL is pulled to ground.
For best thermal performance the exposed thermal pad must be thermally connected to a large exposed copper pad underneath
the package. Additionally, the exposed thermal pad (EP), GND, and PGND must be electrically connected to ground copper.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
3
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Pin Configuration
TQFN55-40
(Top View)
SCL
PWR_HOLD
PWR_ON
EXT_ON
SYSOUT
SYSOUT
PWR_ID
PWR_IN
PWR_IN
USBSEL
STAT
ISETA
TS
CT
LDO2
INLDO
LDO3
LDO1
INLDO
LDO4
40
39
38
37
36
35
34
33
32
31
1
30
2
29
3
28
4
27
5
26
EP
6
25
7
24
8
23
9
22
10
21
11
12
13
14
15
16
17
18
19
SDA
BAT
BAT
FB1
PGND1
LX1
INBUCK
LX2
PGND2
FB2
20
PWR_EN
S1
S2
GND
LBI
LBO
INT
RESET
PBSTAS
LDO5
Absolute Maximum Ratings1
Symbol
Pin Name
PWR_IN, PWR_ID, BAT, SYSOUT, SDA, SCL, RESET, STAT, USBSEL, ISETA, TS, CT, LBI,
LBO, INT, PWR_EN, PWR_HOLD, PWR_ON, PBSTAS, EXT_ON, S1, S2 Voltage to GND
INBUCK, INLDO Voltage to GND
LX1, LX2, FB1, FB2 Voltage to PGND1, PGND2
LDO1, LDO2, LDO3, LDO4, LDO5 Voltage to GND
TJ
TA
TS
TLEAD
PGND1, PGND2 to GND
Operating Junction Temperature Range
Ambient Temperature Range
Storage Temperature Range
Maximum Junction Soldering Temperature (at leads, 10 sec.)
Value
Units
-0.3 to 6.5
V
-0.3 to
VSYSOUT + 0.3
-0.3 to
VINBUCK + 0.3
-0.3 to
VINLDO + 0.3
-0.3 to +0.3
-40 to 150
-40 to 85
-65 to 150
300
V
V
V
V
°C
Thermal Information2, 3, 4
Symbol
θJA
PD
Description
Thermal Resistance
Maximum Power Dissipation
Value
Units
25
4
°C/W
W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
2. Thermal Resistance will be measured with the AAT3608 device on the 4-layer FR4 evaluation board in a thermal oven. The amount of power dissipation which will cause the
thermal shutdown to activate will depend on the ambient temperature and the PC board layout ability to dissipate the heat.
3. Measured on the AAT3608 demo board.
4. Derate the maximum power dissipation by 40mW/°C above 25°C ambient temperature.
4
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Electrical Characteristics1
VPWR_IN = 5V, VPWR_ID = 5V, VBAT = 3.6V, -40°C ≤ TA ≤ +85°C, unless noted otherwise. Typical values are TA = 25°C.
Symbol
Description
Power Supply
VIN
VINBUCK, VINLDO Input Operating Voltage
PWR_IN UVLO Threshold
IOPS
Sleep Mode Battery Operating Current
IOPDS
Deep-Sleep Mode Battery Operating Current
ISHDN
Battery Shutdown Current
Charger Voltage Regulation
VBAT_REG
Output Charge Voltage Regulation
VMIN
Preconditioning Voltage Threshold
VRCH
Battery Recharge Voltage Threshold
Charger Current Regulation
ICH_CC
Constant-Current Mode ADP Charge Current
USB Charge Current
USB Charge Current
KISET
Charge Current Set Factor: ICH_CC/IISET
ICH_PRE
Preconditioning Charge Current
ICH_TERM
Charge Termination Threshold Current
Charging Device
RDS(ON),CHG On-Resistance of Charging Transistor
Logic Control / Protection
VPWR_HOLD, Input High Threshold
VPWR_ON,
Input Low Threshold
VUSBSEL
VINT, VSTAT
Output Low Voltage
VOVP
Over-Voltage Protection Threshold
IOCP
Over Current Protection Threshold
TC
Constant Current Mode Time Out
TK
Trickle Charge Time Out
TV
Constant Voltage Mode Time Out
ITS
Current Source from TS Pin
TS1
TS Hot Temperature Fault
TS2
TS Cold Temperature Fault
Conditions
Min
BAT-SYSOUT Current Limit
5.5
4.5
V
V
200
µA
0°C ≤ TA ≤ +70°C
10
4.158
2.6
RISETA = 1.24kΩ (for 0.8A) (Can be set
to up to 1.2A)
USBSEL = H, PWR_ID = L
USBSEL = L, PWR_ID = L
Constant Current Mode
RISETA = 1.24kΩ
SYSOUT to BAT Switch
4.2
2.8
4.00
4.242
3.0
500
100
800
12
5
mA
mA
mA/
mA
% ICH_CC
% ICH_CC
0.9
69
318
2.30
USBSEL = High, PWR_ID = L
USBSEL = Low, PWR_ID = L
400
Ω
V
Pin Sinks 4mA
Falling Threshold
Hysteresis
Rising Threshold
Hysteresis
V
V
V
mA
1.4
CCT = 100nF
µA
µA
800
0.6
On-Resistance of PWR_IN-SYSOUT Load
Switch
PWR_IN-SYSOUT Current Limit
PWR_IN-SYSOUT Current Limit
Units
100
BAT-SYSOUT
RDS(ON),
Max
2.7
Rising (100mV hysteresis)
VPWR_IN = 0V, Only LDO1, LDO3, and
Buck1 are on
VPWR_IN = 0V, Only Buck1 is on
VPWR_IN = 0V and system is shut down
TLOOP_IN
Thermal Loop Entering Threshold
TLOOP_OUT
Thermal Loop Exiting Threshold
TREG
Thermal Loop Regulation
Load Switches / SYSOUT LDO
RDS(ON),
On-Resistance of BAT-SYSOUT Load Switch
PWR_IN-SYSOUT
Typ
4.3
105
3
TC/8
3
75
331
25
2.39
25
115
85
100
0.3
V
0.4
V
V
% ICH_CC
Hours
Hours
Hours
µA
mV
mV
V
mV
°C
°C
°C
79
346
2.48
100
150
mΩ
0.2
0.3
Ω
2
450
100
2
500
A
mA
mA
A
1. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
5
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Electrical Characteristics (continued)1
VPWR_IN = 5V, VPWR_ID = 5V, VBAT = 3.6V, -40°C ≤ TA ≤ +85°C, unless noted otherwise. Typical values are TA = 25°C.
Symbol
Description
Step-Down Buck Regulator (Buck1)
VINBUCK
Input Voltage Range
VOUT
Output Voltage Programmable Range
VREG
Output Voltage Accuracy
ILIM
P-Channel Current Limit
RDS(ON)H
High-Side Switch On-Resistance
RDS(ON)L
Low-Side Switch On-Resistance
ΔVOUT /
Line Regulation
(VOUT ΔVIN)
FOSC
Oscillator Frequency
Step-Down Buck Regulator (Buck2)
VINBUCK
Input Voltage Range
Feedback Voltage Programmable
VFB
Range
VREG
Output Voltage Accuracy
ILIM
P-Channel Current Limit
RDS(ON)H
High-Side Switch On-Resistance
RDS(ON)L
Low-Side Switch On-Resistance
ΔVOUT /
Line Regulation
(VOUT ΔVIN)
FOSC
Oscillator Frequency
Low-Dropout Regulator (LDO1)
VINLDO
Input Voltage Range
VLDO
IQ
LDO Output Voltage
LDO Quiescent Current
Line Regulation
Dropout Voltage
ILDO
LDO Maximum Load Current
ILDO(LIM)
LDO Current Limit
Low-Dropout Regulator (LDO2)
VINLDO
Input Voltage Range
VLDO
IQ
LDO Output Voltage
LDO Quiescent Current
Line Regulation
LDO Maximum Load Current
ILDO(LIM)
LDO Current Limit
Low-Dropout Regulator (LDO3)
VINLDO
Input Voltage Range
Output Voltage Range
Conditions
Using External Feedback Resistors, No Load
IOUT = 10mA
IQ
ILDO
ILDO(LIM)
LDO Output Voltage
LDO Quiescent Current
Line Regulation
LDO Maximum Load Current
LDO Current Limit
2.7
0.6
0.582
Typ
0.600
2600
450
400
Max
Units
5.5
VINBUCK
0.618
V
V
V
mA
mΩ
mΩ
0.2
%/V
1.5
MHz
2.7
5.5
V
Using I2C, with Default FB = 0.6V
0.5
0.7
V
IOUT = 10mA
-3
+3
2600
450
400
%
mA
mΩ
mΩ
0.2
%/V
1.5
MHz
ILDO = 1mA to 300mA, S1 = 0, S2 = 0
ILDO = 1mA to 300mA, S1 = 0, S2 = 1
ILDO = 1mA to 300mA, S1 = 1, S2 = 0
VINLDO = 5V, added quiescent current when
LDO is enabled
ILDO = 10mA
ILDO = 300mA
2.7
2.91
3.20
2.71
3.00
3.30
2.80
5.5
3.09
3.40
2.89
V
V
V
V
50
90
µA
0.09
100
170
500
800
2.7
ILDO = 1mA to 80mA
1.164
VINLDO = 5V, added quiescent current when
LDO is enabled
ILDO = 10mA
ILDO
VLDO
Min
5.5
V
1.2
1.236
V
35
80
µA
0.09
%/V
mA
mA
200
800
Using I2C. Default=1.2V
2.7
0.8
5.5
1.4
V
V
ILDO = 1mA to 80mA
-3
+3
%
80
µA
VINLDO = 5V, added quiescent current when
LDO is enabled
ILDO = 10mA
35
0.09
200
800
1. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls.
6
%/V
mV
mA
mA
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
%/V
mA
mA
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Electrical Characteristics (continued)1
VPWR_IN = 5V, VPWR_ID = 5V, VBAT = 3.6V, -40°C ≤ TA ≤ +85°C, unless noted otherwise. Typical values are TA = 25°C.
Symbol
Description
Low-Dropout Regulator (LDO4)
VINLDO
Input Voltage Range
VLDO
LDO Output Voltage
IQ
LDO Quiescent Current
Line Regulation
LDO Maximum Load Current
ILDO(LIM)
LDO Current Limit
Low-Dropout Regulator (LDO5)
VINLDO
Input Voltage Range
VLDO
LDO Output Voltage
Conditions
ILDO = 1mA to 50mA
VINLDO = 5V, added quiescent current
when LDO is enabled
ILDO = 10mA
ILDO
IQ
LDO Quiescent Current
Line Regulation
LDO Maximum Load Current
ILDO(LIM)
LDO Current Limit
Reset and Low-Battery Comparator
Reset Time
Low-Battery Threshold Voltage
Thermal
TSD
Over-Temperature Shutdown Threshold
THYS
Over-Temperature Shutdown Hysteresis
SCL, SDA (I2C Interface)
FSCL
Clock Frequency
TLOW
Clock Low Period
THIGH
Clock High Period
THD_STA
Hold Time for START Condition
TSU_STA
Set-up Time for Repeated START Condition
TSU_DAT
Data Setup Time
THD_DAT
Data Hold Low Time
TSU_STO
Setup Time for STOP Condition
Bus Free Time Between STOP and START
TBUF
Condition
VIL
Input Threshold Low
VIH
Input Threshold High
II
Input Leakage Current
VOL
Output Logic Low (SDA)
Typ
Max
Units
2.7
2.425
2.5
5.5
2.575
V
V
50
80
µA
0.09
%/V
mA
mA
200
800
ILDO = 1mA to 50mA
VINLDO = 5V, added quiescent current
when LDO is enabled
ILDO = 10mA
ILDO
Buck2 Power OK Threshold
Min
2.7
3.2
3.3
5.5
3.4
V
V
50
80
µA
0.09
%/V
mA
mA
200
800
Rising threshold
Hysteresis
From Power OK of BUCK2 output to
RESET pin rising edge
Falling Edge
Hysteresis
91
0.96
Rising
3
%
%
200
ms
1.0
50
1.04
140
15
0
1.3
0.6
0.6
0.6
100
°C
°C
400
0.6
kHz
µs
µs
µs
µs
ns
µs
µs
1.3
µs
0.9
2.7V ≤ VIN ≤ 5.5V
2.7V ≤ VIN ≤ 5.5V
V
mV
0.3
1.4
-1.0
IPULLUP = 3mA
1.0
0.3
V
V
µA
V
1. Specification over the -40°C to +85°C operating temperature range is assured by design, characterization and correlation with statistical process controls.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
7
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Charger
Power-In to SYSOUT Switch Current Limit
Power-In to SYSOUT Switch Current Limit
(100mA)
180
2.5
1.5
1.0
0.5
0.0
0.5A
2.0A
0
I(PWRIN-SYSOUT) (mA)
I(PWRIN-SYSOUT) (A)
160
2.0
140
120
100
80
60
40
20
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2
V(PWRIN-SYSOUT) (V)
V(PWRIN-SYSOUT) (V)
IBAT vs. Temperature
IBAT vs. Temperature
(500mA)
100.2
501
100.0
500
99.8
499
99.6
IBAT (mA)
IBAT (mA)
(100mA)
99.4
99.2
99.0
497
496
495
98.8
494
98.6
98.4
-60
498
-40
-20
0
20
40
60
80
493
-60
100
-40
-20
Temperature (°C)
I(BAT-SYSOUT) (mA)
2.5
2.0
1.5
1.0
0.5
0.5
1.0
1.5
2.0
2.5
V(BAT-SYSOUT) (V)
40
60
80
100
3.0
3.5
4.0
Constant Charging Current vs. RSET
Constant Charging Current (mA)
3.0
0
20
Temperature (°C)
Ideal Diode Load Switch between VBAT and VSYSOUT
0.0
0
10000
1000
100
10
1
0.1
1
10
100
1000
RSET (kΩ)
Constant Current
Trickle Charge
8
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Charger
Adapter Mode Supply Current vs. RSET Resistor
5.0
Constant Current
Preconditioning
4.5
4.0
IQ (mA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.1
1
10
RSET (kΩ)
100
1000
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
9
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Buck1
Efficiency vs. Load
Load Regulation
(VB1 = 2.5V; L1 = 2.2µH)
(VB1 = 2.5V; L1 = 2.2µH)
100
Output Voltage Error (%)
2.5
90
Efficiency (%)
80
70
60
50
40
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.9V
VBAT = 4.2V
30
20
10
0
0.1
1
10
100
2.0
1.5
1.0
0.5
0.0
-0.5
-1.5
-2.0
-2.5
0.1
1000
Output Current (mA)
0.45
0.40
0.35
4.0
4.1
3.6
0
2.55
2.50
2.45
0.2
0.0
4.2
VBAT Voltage (V)
Time (100µs/div)
Output Ripple
System Line Transient Response
0
2.52
2.50
2.48
1.0
0.8
0.6
6
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
3.6
5
4
3
2
2.7
2.5
2.3
2.1
Time (200µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Output Voltage
(bottom) (V)
10
(VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB1 = 2.5V; IOUTB1 = 800mA; falling)
LX Voltage (top) (V)
Inductor Current (bottom) (A)
Output Voltage (middle) (V)
(VBAT = 3.6V; VB1 = 2.5V; IOUTB1 = 800mA)
Time (500ns/div)
1000
Output Ripple
Output Voltage (middle) (V)
Input Current (mA)
85°C
25°C
-40°C
3.9
100
LX Voltage (top) (V)
Inductor Current (bottom) (A)
0.50
3.8
10
(VBAT = 3.6V; VB1 = 2.5V; IOUTB1 = 1mA)
(VEN = VBAT; Closed Loop)
3.7
1
Output Current (mA)
No Load Total Input Current vs. VBAT Voltage
0.30
3.6
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.9V
VBAT = 4.2V
-1.0
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Buck1 (continued)
System Line Transient Response
System Load Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB1 = 2.5V; IOUTB1 = 800mA; rising)
(IOUTB1 = 80mA to 800mA; VBAT = 3.6V; COUTB1 = 4.7µF; CFF1 = 0pF)
1.5
5
2
2.7
2.5
Output Voltage
(bottom) (V)
3
Output Voltage
(bottom) (V)
4
0.0
2.7
2.5
2.3
2.1
2.1
Time (100µs/div)
Line Regulation
Output Voltage Error vs. Temperature
(VOUT1 = 2.5V; L1 = 2.2µH)
(VBAT = 3.6V; VOUT1 = 2.5V)
0.3
1.5
Output Voltage Error (%)
Output Voltage Error (%)
0.5
80mA
2.3
Time (200µs/div)
0.2
0.1
0.0
-0.1
IOUT = 50mA
IOUT = 100mA
IOUT = 400mA
IOUT = 800mA
-0.2
-0.3
3.3
3.5
3.7
3.9
4.1
4.3
0.5
0.0
-0.5
-1.0
-25
0
25
50
75
100
Temperature (°C)
Switching Frequency vs. Temperature
Switching Frequency vs. VBAT Voltage
(VIN = 3.6V; VOUT1 = 2.5V; IOUT1 = 800mA)
(VOUT1 = 2.5V; IOUT1 = 800mA)
0.20
Frequency Variation (%)
1.52
1.51
1.50
1.49
1.48
-40
IOUT1 = 10mA
IOUT1 = 100mA
IOUT1 = 400mA
IOUT1 = 800mA
1.0
-1.5
-50
4.5
VBAT Voltage (V)
Switching Frequency (MHz)
1.0
800mA
Output Current
(top) (A)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
-20
0
20
40
Temperature (°C)
60
80
100
0.15
0.10
0.05
0.00
-0.05
-0.10
-0.15
-0.20
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
VBAT Voltage (V)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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11
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Buck1 (continued)
Soft Start
4
3
2
1
0
1.0
0.5
0.0
Output Current (bottom) (A)
EnableVoltage (top) (V)
Output Voltage (middle) (V)
(VBAT = 3.6V; VOUT1 = 2.5V; IOUT1 = 800mA; CFF = 100pF)
Time (100µs/div)
12
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Buck2
Efficiency vs. Load
DC Regulation vs. Load
(VB2 = 1.2V; L2 = 2.2µH)
100
2.5
90
2.0
80
1.5
Output Error (%)
Efficiency (%)
(VB2 = 1.2V; L2 = 2.2µH)
70
60
50
40
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.9V
VBAT = 4.2V
30
20
10
0
0.1
1
10
100
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
0.1
1000
Output Current (mA)
Output Ripple
100
1000
Output Ripple
1.20
0.4
0.2
0.0
Time (50µs/div)
Output Voltage (middle) (V)
1.22
3.6
0
1.22
1.20
1.18
1.0
0.8
0.6
Time (500ns/div)
System Line Transient Response
LX Voltage (top) (V)
Inductor Current (bottom) (A)
0
LX Voltage (top) (V)
Inductor Current (bottom) (A)
Output Voltage (middle) (V)
10
(VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 800mA)
3.6
System Line Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 800mA; falling)
(VIN = 3.5V to 5V; VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 800mA; rising)
6
4
3
2
1.3
1.2
1.1
1.0
Time (200µs/div)
5
4
3
2
1.3
1.2
Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
5
Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
1
Output Current (mA)
(VBAT = 3.6V; VOUTB2 = 1.2V; IOUTB2 = 1mA)
1.18
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.9V
VBAT = 4.2V
1.1
1.0
Time (200µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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13
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−Buck2 (continued)
System Load Transient Response
Line Regulation
(IOUTB2 = 80mA to 800mA; VBAT = 3.6V; COUTB2 = 4.7µF; CFF1 = 0pF)
(VOUT2 = 2.5V; L2 = 2.2µH)
0.3
1.0
Output Voltage
(bottom) (V)
0.0
1.3
1.2
Output Current
(top) (A)
0.5
80mA
1.1
1.0
Output Voltage Error (%)
1.5
800mA
IOUT2 = 10mA
IOUT2 = 50mA
IOUT2 = 100mA
IOUT2 = 400mA
IOUT2 = 800mA
0.2
0.1
0.0
-0.1
-0.2
-0.3
3.2
0.5
0.0
-0.5
IOUT2 = 10mA
IOUT2 = 100mA
IOUT2 = 400mA
IOUT2 = 800mA
-1.0
50
Temperature (°C)
14
75
EnableVoltage (top) (V)
Output Voltage (middle) (V)
Output Voltage Error (%)
1.0
25
4.0
4.2
4.4
4
3
2
1
0
1.0
0.5
0.0
100
Time (100µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
Output Current (bottom) (A)
1.5
0
3.8
(VBAT = 3.6V; VOUT1 = 1.2V; IOUT2 = 800mA; CFF = 100pF)
(VBAT = 3.6V; VOUT2 = 1.2V)
-25
3.6
Soft Start
Output Voltage Error vs. Temperature
-1.5
-50
3.4
VBAT Voltage (V)
Time (100µs/div)
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO1
System Line Transient Response
System Line Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO1 = 3V; ILDO1 = 300mA; rising)
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO1 = 3V; ILDO1 = 300mA; falling)
3
3.2
3.1
3.0
2.9
2.8
Time (200µs/div)
5
4
3
3.1
3.0
2.9
2.8
Time (200µs/div)
Output Voltage Error vs. Temperature
Line Regulation
(VLDO1 = 3.0V)
0.3
1.5
Output Voltage Error (%)
LDO1 Output Voltage Error (%)
(VBAT = 3.6V; VLDO1 = 3.0V)
1.0
0.5
0.0
IOUT = 0.1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 150mA
IOUT = 300mA
-0.5
-1.0
-1.5
-50
-25
0
25
50
75
Temperature (°C)
0.1
0.0
-0.1
-0.2
LDO1 Output Voltage Error (%)
LDO1 Output Voltage
(bottom) (V)
0.1
0.0
2.90
Time (200µs/div)
4.2
4.4
Load Regulation
LDO1 Output Current
(top) (A)
0.2
4.0
(VBAT = 3.6V; VLDO1 = 3.0V)
0.4
2.95
3.8
Load Transient Response
3.00
3.6
VBAT Voltage (V)
(ILDO1 = 30mA to 300mA; VBAT = 3.6V; VLDO1 = 3V; CLDO1 = 4.7µF)
3.05
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
IOUT = 150mA
IOUT = 300mA
0.2
-0.3
3.4
100
0.3
LDO1 Output Voltage
(bottom) (V)
4
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
5
LDO1 Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
1
10
100
1000
Output Current (mA)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
15
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO1 (continued)
4
3
2
1
0
200
100
0
LDO1 Output Current
(bottom) (mA)
Enable Voltage (top) (V)
LDO1 Output Voltage (middle) (V)
Soft Start
(VBAT = 3.6V; VLDO1 = 3.0V; ILDO1 = 150mA)
Time (100µs/div)
16
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO2
System Line Transient Response
System Line Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO2 = 1.2V; ILDO2 = 80mA; rising)
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO2 = 1.2V; ILDO2 = 80mA; falling)
6
3
2
1
1.3
0
1.2
1.1
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
4
1.0
Time (200µs/div)
4
3
1.3
1.2
1.1
1.0
Time (200µs/div)
Load Transient Response
Output Voltage Error vs. Temperature
(ILDO2 = 8mA to 80mA; VBAT = 3.6V; VLDO2 = 1.2V; CLDO2 = 4.7µF)
LDO2 Output Voltage Error (%)
(VBAT = 3.6V; VLDO2 = 1.2V)
150
100
50
0
1.22
1.20
1.18
LDO2 Output Current
(top) (mA)
LDO2 Output Voltage
(bottom) (V)
5
1.16
Time (200µs/div)
1.5
1.0
0.5
0.0
-0.5
-1.5
-50
LDO2 Output Voltage Error (%)
LDO2 Output Accuracy (%)
0.1
0.0
-0.1
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
3.8
4.0
VBAT Voltage (V)
25
50
75
100
Load Regulation
0.2
3.6
0
(VBAT = 3.6V; VLDO2 = 1.2V)
0.3
3.4
-25
Temperature (°C)
(VLDO2 = 1.2V)
-0.3
3.2
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
-1.0
Line Regulation
-0.2
LDO2 Output Voltage
(bottom) (V)
5
LDO2 Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
4.2
4.4
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
1
10
100
Output Current (mA)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
17
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO2 (continued)
4
3
2
1
0
100
50
0
LDO2 Output Current
(bottom) (mA)
Enable Voltage (top) (V)
LDO2 Output Voltage (middle) (V)
Soft Start
(VBAT = 3.6V; VLDO2 = 1.2V; ILDO2 = 80mA)
Time (100µs/div)
18
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO3
System Line Transient Response
System Line Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO3 = 1.2V; ILDO3 = 80mA; rising)
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO3 = 1.2V; ILDO3 = 80mA; falling)
6
3
1.4
1.3
1.2
1.1
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
4
1.0
Time (200µs/div)
5
4
3
1.3
1.2
1.1
1.0
Time (200µs/div)
Load Transient Response
Line Regulation
(ILDO3 = 8mA to 80mA; VBAT = 3.6V; CLDO3 = 4.7µF)
(VLDO3 = 1.2V)
0
1.22
1.20
1.18
LDO3 Output Accuracy (%)
50
LDO3 Output Current
(top) (mA)
LDO3 Output Voltage
(bottom) (V)
150
100
1.16
Time (200µs/div)
0.3
0.2
0.1
0.0
-0.1
-0.3
3.2
LDO3 Output Voltage Error (%)
LDO3 Output Voltage Error (%)
0.0
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
25
50
Temperature (°C)
75
4.0
4.2
4.4
Load Regulation
0.5
0
3.8
(VBAT = 3.6V; VLDO3 = 1.2V)
1.0
-25
3.6
1.5
-1.5
-50
3.4
VBAT Voltage (V)
(VBAT = 3.6V; VLDO3 = 1.2V)
-1.0
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
-0.2
Output Voltage Error vs. Temperature
-0.5
LDO3 Output Voltage
(bottom) (V)
5
LDO3 Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
100
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
1
10
100
Output Current (mA)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
19
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO3 (continued)
4
3
2
1
0
100
50
0
LDO3 Output Current
(bottom) (mA)
Enable Voltage (top) (V)
LDO3 Output Voltage (middle) (V)
Soft Start
(VBAT = 3.6V; VLDO3 = 1.2V; ILDO3 = 80mA)
Time (100µs/div)
20
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO4
System Line Transient Response
System Line Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO4 = 2.5V; ILDO4 = 50mA; rising)
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO4 = 2.5V; ILDO4 = 50mA; falling)
3
2.7
2.6
2.5
2.4
2.3
Time (200µs/div)
5
4
3
2.7
2.6
2.5
2.4
2.3
Time (200µs/div)
Load Transient Response
Line Regulation
(ILDO4 = 5mA to 50mA; VBAT = 3.6V; VLDO4 = 2.5V; CLDO4 = 4.7µF)
(VLDO4 = 2.5V)
0
2.52
2.50
2.48
Output Voltage Error (%)
50
0.3
LDO4 Output Current
(top) (A)
LDO4 Output Voltage
(bottom) (V)
150
100
2.46
0.2
0.1
0.0
-0.1
Time (200µs/div)
LDO4 Output Voltage Error (%)
LDO4 Output Voltage Error (%)
0.5
0.0
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
25
50
Temperature (°C)
75
4.0
4.2
4.4
Load Regulation
1.0
-1.0
3.8
(VBAT = 3.6V; VLDO4 = 2.5V)
1.5
0
3.6
(VBAT = 3.6V; VLDO4 = 2.5V)
-25
3.4
VBAT Voltage (V)
Output Voltage Error vs. Temperature
-1.5
-50
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
-0.2
-0.3
3.2
-0.5
LDO4 Output Voltage
(bottom) (V)
4
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
5
LDO4 Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
100
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
1
10
100
Output Current (mA)
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21
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO4 (continued)
4
3
2
1
0
100
50
0
LDO4 Output Current
(bottom) (mA)
Enable Voltage (top) (V)
LDO4 Output Voltage (middle) (V)
Soft Start
(VBAT = 3.6V; VLDO4 = 2.5V; ILDO4 = 50mA)
Time (100µs/div)
22
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO5
System Line Transient Response
System Line Transient Response
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO5 = 3.3V; ILDO5 = 50mA; rising)
(VIN = 3.5V to 5V; VBAT = 3.6V; VLDO5 = 3.3V; ILDO5 = 50mA; falling)
6
3
3.5
3.4
3.3
3.2
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
4
3.1
Time (200µs/div)
5
4
3
0
3.34
3.32
3.30
3.28
LDO5 Output Accuracy (%)
LDO5 Output Voltage
(bottom) (V)
50
3.26
Time (200µs/div)
0.3
0.2
0.1
0.0
-0.1
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
-0.2
-0.3
3.6
3.8
4.0
LDO5 Output Voltage Error (%)
(VBAT = 3.6V; VLDO5 = 3.3V)
1.5
1.0
0.5
0.0
IOUT = 0.1mA
IOUT = 1mA
IOUT = 10mA
IOUT = 100mA
-1.0
50
Temperature (°C)
75
4.4
Load Regulation
(VBAT = 3.6V; VLDO4 = 3.3V)
-0.5
4.2
VBAT Voltage (V)
Output Voltage Error vs. Temperature
LDO5 Output Voltage Error (%)
3.1
(VLDO5 = 3.3V)
LDO5 Output Current
(top) (A)
100
25
3.2
Line Regulation
150
0
3.3
Time (200µs/div)
Load Transient Response
-25
3.4
(ILDO5 = 5mA to 50mA; VBAT = 3.9V; CLDO5 = 4.7µF)
-1.5
-50
3.5
LDO5 Output Voltage
(bottom) (V)
5
LDO5 Output Voltage
(bottom) (V)
Sysout Voltage (top) (V)
VBAT Voltage (middle) (V)
6
100
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
0.1
1
10
100
Output Current (mA)
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23
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Typical Characteristics−LDO5 (continued)
4
3
2
1
0
0.10
0.05
0.00
LDO5 Output Current
(bottom) (A)
Enable Voltage (top) (V)
LDO5 Output Voltage (middle) (V)
Soft Start
(VBAT = 3.6V; VLDO5 = 3.3V; ILDO5 = 50mA)
Time (100µs/div)
24
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Functional Block Diagram
1 Cell Li-Ion
+
To INBUCK, INLDO
SYSOUT
PWR_IN
PWR_ID
USBSEL
38,39
INBUCK
28,29
24
Load
Switch
Charge
Switch
Buck1
LBO
Li-Ion
Linear
Charger
Control
3
4
EXT_ON
PWR_HOLD
INT
SDA
SCL
LBO
LBI
PGND1
Reset
Thermal
Shutdown
1
RESET
12
23
LX2
22
PGND2
20
34
2µ
2µ
32
SYSOUT
L2
320ms Debounce
320ms Debounce
Buck1 OK
6,9
Enable
Control and
I2C Logic
LDO1
8
0.6V (default )
FB2 is I 2C adj.
from 0.5V to 0.7V
FB2
PWR_EN
INLDO
LDO1
300mA max
5
LDO2
BUCK2
800mA max
21
33
BUCK1
800mA max
0.6V to 5.5V
INBUCK
Buck2
3.3V/3.0V/2.8 V (S1 & S2 bits)
LDO2
1.2 V (fixed)
LDO3
1.2V (default )
80mA max
14
LDO3
30
31
15
16
7
2
80mA max Output is I C adj.
from 1.0 V to 1.4V
10
BAT
+
PWR_ON
26
L1
13
BUCK1
PBSTAS
LX1
FB1
2
CT
25
27
40
TS
STAT
BAT
37
ISETA
BAT
35,36
LDO4
1.0V
LDO5
17
GND
19
S1
Functional Description
The AAT3608 is a complete power management solution.
It seamlessly integrates a battery charger with two stepdown converters and five low-dropout regulators to provide power from either an external power source or a
single-cell Lithium Ion/Polymer battery. Internal load
switches allow the converters to operate from the best
available power source.
If only the battery is available, then the voltage converters are powered directly from the battery through a 100
mΩ load switch (BAT to SYSOUT). During this condition,
the charger is put into sleep mode and draws less than
1µA quiescent current. If the system is connected to a
wall adapter, then the voltage converters are powered
directly from the adapter through a 200mΩ load-switch
(PWR_IN to SYSOUT) and the battery is disconnected
from the voltage converter inputs. This allows the sys-
S2
LDO4
2.5V (default )
LDO5
3.3V (default )
50mA max 3.3V/2.85V/2.5V/1.8V (I 2C)
11
50mA max 3.3V/3.0V/1.5V/1.2V (I 2C)
18
tem to operate regardless of the state of the battery. It
can even operate with no battery.
System Output (SYSOUT)
Intelligent control of the integrated load switches is
managed by the switch control circuitry. If the voltage
across PWR_IN and GND pin is above the UVLO typical
threshold voltage of 4.5, then the switch control will
automatically short the load switch connecting PWR_IN
to SYSOUT. Additionally, the charging switch will be
enabled and switch connecting BAT and SYSOUT will be
turned off. The location of the two switches and the battery charging switch allows the step-down converter and
LDO to always have the best available source of power.
Furthermore, AAT3806 control logic allows the voltage
converters to operate with no battery, or with a battery
voltage below the trickle charge threshold.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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25
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Battery Charging
Battery charging commences only after the AAT3608 battery charger checks several conditions in order to maintain a safe charging environment. When an adapter input
is connected to PWR_IN and is greater than 4.5V, the
ENCHG bit is set (default) and the PWR_HOLD signal is
high, the charger is enabled. The charger can be disabled
by clearing the ENCHG bit through the I2C interface.
Figure 1 illustrates the entire battery charging profile or
operation, which consists of three phases:
1. Preconditioning (Trickle) Charge
2. Constant Current Charge
3. Constant Voltage Charge
During battery charging, the battery charger initially
checks the condition of the battery and determines which
charging mode to apply. If the battery voltage is below
VMIN, then the battery charger initiates trickle charge
mode and charges the battery at 12% of the programmed
constant-current magnitude. For example, if the programmed current (ISETA) is 500mA, then the trickle charge
current will be 60mA. Trickle charge is a safety precaution for a deeply discharged cell. It is intended to reduce
stress on the battery, but also reduces the power dissipation in the internal series pass MOSFET when the inputoutput voltage differential is at its highest.
Trickle charge continues until the battery voltage reaches 2.8V. At this point the battery charger begins constant-current charging. The current level for this mode is
programmed using a resistor from the ISETA pin to
ground, or can be selected through the USBSEL pin with
Charge Complete Voltage
Preconditioning
Trickle Charge
Phase
Constant Current (CC)
Charge Phase
ICH_CC
Regulated Current
settings of 100mA or 500mA; refer to the logic settings
in Table 2. Constant-current charging continues until the
voltage reaches the charge voltage regulation point.
VBAT_REG is factory programmed to 4.2V (nominal).
Charging in constant-voltage mode will continue until the
charge current has reduced to the charge termination
current threshold. After the charge cycle is complete, the
battery charger turns off the series pass device and
automatically goes into a power saving sleep mode.
During this time, the series pass device will block current
in both directions to prevent the battery from discharging through the battery charger.
The battery charger will remain in sleep mode even if the
charger source is disconnected. It will come out of sleep
mode when either the battery terminal voltage drops
below the VRCH threshold, or the charging source is
removed and reconnected. In all cases, the battery charger will monitor all parameters and resume charging in
the most appropriate mode.
Battery Temperature Fault Monitoring
The TS pin is available to monitor the battery temperature. Connect a 10k NTC resistor from the TS pin to
ground. The TS pin outputs a 75µA constant current into
the resistor and monitors the voltage to ensure that the
battery temperature does not fall outside the operating
limits depending on the temperature coefficient of the
resistor used. When the voltage goes above 2.39V or
goes below 0.331V, the charging will be suspended. A
Beta range of 3300 to 4000 will place the typical charging temperature between -4°C and 48°C.
Constant Voltage
Charge Phase
Battery Discharge
(CC)
Constant Voltage
Charge Phase
Battery Recharge
Voltage Threshold
Constant Current Mode
Voltage Threshold (VMIN)
Trickle Charge and
Termination Threshold
ICH_PRE
Figure 1: Current vs. Voltage Profile During Charging Phases.
26
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Battery Charging Flowchart
Enable
No
Power on Reset
Yes
No
Power Input
Voltage
VIN > VUVLO
Enable
Yes
Shut Down
Yes
Fault
Conditions
Monitoring
OV, OT,
TS < VTS1
TS > VTS2
Expired
Charge Timer
Control
No
Yes
Preconditioning
Trickle Charge
VBAT < VMIN
Yes
No
Recharge Test
VBAT < VRCH
Yes
Constant Current
VBAT < VBAT_EOC
Thermal
Loop
Thermal
Loop
Current
Current
Reductionin
inADP
Reduction
C.C.
ModeMode
Charging
Yes
No
No
No
Yes
Device Thermal
Loop Monitor
TJ > 115 C
Constant
Voltage
IBAT > ITERM
No
Charge Completed
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27
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Buck Regulators
The AAT3608 step-down converters are peak current
mode PWM converters operating at 1.5MHz frequency.
The input voltage range is 2.7V to 5.5V. The converters
provide internal compensation. Power devices are sized
for 800mA output current while maintaining over 85%
efficiency at full load. Peak efficiency is above 90%.
Light load efficiency is maintained at greater than 80%
down to 85% of full load current. Soft start limits the
current surge seen at the input and eliminates output
voltage overshoot.
The input pin, INBUCK (Pin 24) must be connected to
the SYSOUT output pin. The Buck1 output voltage is
adjustable from 0.6V to 5.5V and is programmed
through an external resistor divider. Buck2 output
default value is set by external resistor feedback and
then the feedback voltage can be dynamically adjusted
via I2C in 12.5mV increments from 0.5V to 0.7V.
For overload conditions, the peak input current is limited. Also, thermal protection completely disables switching if internal dissipation becomes excessive, thus protecting the device from damage. The junction overtemperature threshold is 140°C with 15°C of hysteresis.
Under-voltage lockout (UVLO) guarantees sufficient VIN
bias and proper operation of all internal circuits prior to
activation.
The current through the P-channel MOSFET (high side)
is sensed for current loop control, as well as short circuit
and overload protection. A fixed slope compensation
signal is added to the sensed current to maintain stability for duty cycles greater than 50%. The peak current
mode loop appears as a voltage-programmed current
source in parallel with the output capacitor. The output
of the voltage error amplifier programs the current mode
loop for the necessary peak switch current to force a
constant output voltage for all load and line conditions.
Internal loop compensation terminates the transconductance voltage error amplifier output. The reference voltage is internally set to program the converter output
voltage greater than or equal to 0.6V.
For conditions where the input voltage drops to the output voltage level, the converter duty cycle increases to
100%. As the converter approaches the 100% duty
cycle, the minimum off-time initially forces the high side
on-time to exceed the 1.5MHz clock cycle and reduces
the effective switching frequency. Once the input drops
28
below the level where the converter can regulate the
output, the high side P-channel MOSFET is enabled continuously for 100% duty cycle. At 100% duty cycle the
output voltage tracks the input voltage minus the I*R
drop of the high side P-channel MOSFET.
For overload conditions, the peak input current is limited. The bucks use a cycle-by-cycle current limit to protect itself and the load from an external fault condition.
Thermal protection completely disables switching when
internal dissipation becomes excessive. The junction
over-temperature threshold is 140°C with 15°C of hysteresis. Once an over-temperature or over-current fault
conditions is removed, the output voltage automatically
recovers.
Low-Dropout Regulators
The advanced circuit design of the linear regulators has
been specifically optimized for very fast start-up and
shutdown timing. These proprietary LDOs are tailored
for superior transient response characteristics. These
traits are particularly important for applications which
require fast power supply timing.
The high-speed turn-on capability is enabled through the
implementation of a fast start control circuit, which
accelerates the power up behavior of fundamental control and feedback circuits within the LDO regulator. For
fast turn-off time response is achieved by an active output pull down circuit, which is enabled when the LDO
regulator is placed in the shutdown mode. This active
fast shutdown circuit has no adverse effect on normal
device operation.
There are two LDO input pins, INLDO (pins 6 and 9),
which must be connected to the SYSOUT output pin.The
LDO1 output voltage is selectable using pins S1 and S2
as shown in Table 1. LDO2 is fixed at 1.2V, LDO4 is fixed
at 2.5V and LDO5 is fixed at 3.3V. LDO3 output default
value is 1.2V and then can be dynamically adjusted via
I2C in 25mV increments from 1.0V to 1.4V.
S1
S2
LDO1
0
0
1
1
0
1
0
1
3.0V
3.3V
2.8V
Reserved
Table 1: LDO1 Output Voltages.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Controlling the System Outputs
Deep Sleep Mode
The AAT3608 has a specific startup and shutdown conditions depending on its mode of operation.
“Deep Sleep Mode” is both an SOC and PMU-defined
mode where all regulators have been turned off except
for SYSOUT and Buck1. Data is backed up by the SOC
and Buck1 stays alive to maintain the memory. LDO4
and LDO5 would be turned off separately by I2C, but the
DS_RDY and PWR_DS I2C bits are used to get into and
out of Deep Sleep Mode. See the flowchart diagrams for
more detail.
Shutdown Mode
“Shutdown Mode” is defined as the mode where the
entire PMU (Power Management Unit) is shut down. This
is a state that normally happens after all power has been
disconnected from PWR_IN and BAT. Typically, after
power has been applied and the part has been turned
on, it will normally never need to be turned off. For GPS
applications, the amount of time required for the SOC to
start up from shutdown is prohibitively long, so the only
time that it will go into Shutdown Mode (from any other
mode) is when PWR_IN is disconnected and the BAT is
below the Low-Battery comparator threshold.
Normal Mode
“Normal Mode” is defined as the mode where all regulators are active. Once the part is in Normal Mode, it will
typically go into Sleep or Deep-Sleep Mode when trying
to save current.
SOC Sleep Mode
“Sleep Mode” is an SOC-defined mode which simply
means that all regulators are shut down except SYSOUT,
Buck1, LDO1, and LDO3. To get into this mode from
Normal, the SOC will pull the PWR_EN pin low to turn off
LDO2, LDO4, and LDO5. Buck2 can also be controlled by
PWR_EN only if the SOC masks PWR_EN through I2C.
From a PMU point of view, it is no different from Normal
Mode except for the regulators that have been switched
off by pulling PWR_EN low.
PWR_ID Pin
The PWR_ID pin is an input logic pin which determines
the current limits and fast charge currents that will be
used by PMU. PWR_ID settings are listed in Table 2.
Timing Sequences
The AAT3608 has a specific startup sequence when the
device is activated. See the timing diagrams in Figures 2
through 7.
RESET
The RESET pin is an open drain active low output signal
for system reset. Connect a pull-up resistor from the
RESET pin to SYSOUT pin with a recommended resistance value of 100kΩ. After Buck2 and LDO2 reach their
target nominal output voltage, a delay of 200ms exists
before RESET goes high; refer to the timing diagram in
Figure 2.
PWR_ID Pin
USBSEL Pin
PWR_IN – SYSOUT
Switch Current Limit
Battery Fast Charge Current
L
L
H
L
H
X
100mA (typical)
500mA (typical)
Up to 1.2A (typical)
100mA (typical)
500mA (typical)
Set by the resistor at the ISETA pin.
Table 2: PWR_ID Settings.
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29
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Power off sequence
Power on sequence
Normal Mode
SYSOUT
Wake up sequence
Sleep Mode
Normal Mode
SYSOUT
LDO3
BUCK2
LDO1
BUCK1
PWR_ EN
disabled
PWR_EN pin
LDO2
PWR_ EN
asserted
Triggered by
PWR_EN
LDO4
LDO5
RESET pin
1ms
200ms
Figure 2: Normal  Sleep Mode Sequence.
The user pushes and releases the button to go into Sleep Mode
.
The user pushes and releases the pushbutton again to go back to Normal Mode
.
PWR_ON
2u
The PMU
regulators
only react to
the PWR_EN PWR_EN
pin.
PBSTAS
320ms
Debounce
PWR_HOLD
AAT3608
PMU
GPIO
X_PWR_EN
PWR_HOLD
BUCK2
LDO2
LDO4 &
LDO5
SOC
Figure 3: Normal  Sleep Mode Block Diagram.
30
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Power off
sequence
Power on sequence
Normal Mode
Wake up
sequence
Deep-sleep Mode
Normal Mode
SYSOUT
LDO3
BUCK2
LDO1
LDO2
BUCK1
LDO4
LDO5
LDO5 (VDDA3V3_USB),
LDO4 (VDDA2V5_USB, VDDIO_TSC,
VDDA_TSC, VREF_ADC)
X_RESET_B
T1
T2
T2
Notes 1: T1 at least 650µS for internal LVR setup time; T2 is about 2ms to wait until PLL is stable; other time interval is dependent on power stability.
Notes 2: After wake-up sequence from Deep-sleep Mode, the power on sequence to Normal Mode is similar to when powering on initially.
Figure 4: Normal  Deep-Sleep Mode Sequence.
Deep-Sleep
Ready
When Deep-Sleep is
triggered (by the pushbutton)
DS_RDY = 1
-SOC will back up all data
PWR_DS = 0
-SOC will turn off LDO4 and
LDO5 using I2C
-SOC will set DS_RDY bit
using I2C
Buck1 on
Buck2 on
LDO1 on
SOC sets PWR_DS bit through I2C.
PMU sees that PWR_DS has been set
so then PMU disables regulators Buck2,
LDO1, LDO2, LDO3, LDO4,and LDO5
simultaneously.
Each Buck output is at High-Z, but all
LDOs will be pulled to GND.
LDO2 on
Deep-Sleep
Mode
LDO3 on
LDO4 off
Normal Mode
DS_RDY = 1
LDO5 off
PWR_DS = 1
SYSOUT on
DS_RDY = 0
Buck1 on
Charger on
PWR_DS = 0
Buck2 off
LB comp on
LDO1 off
Buck1 on
LDO2 off
Buck2 on
LDO3 off
LDO1 on
LDO4 off
LDO2 on
LDO3 on
LDO4 on
LDO5 on
SYSOUT on
Charger on
LB comp on
LDO5 off
2
SOC reads I C
DS_RDY bit from
PMU.
SOC first sets
DS_RDY bit to 0
and then retrieves
memory.
SOC will pull up the
PWR_EN pin to turn
on LDO2, LDO4, and
LDO5 simultaneously.
SYSOUT on
DS_RDY = 1
PWR_DS = 0
Charger on
LB comp on
Buck1 on
Buck2 on
LDO1 on
LDO2 off
LDO3 on
LDO4 off
LDO5 off
SYSOUT on
When LDO3 AND
Buck2 reach 90%
regulation, the PMU
will turn on LDO1.
User presses pushbutton
connected to PWR_ON (or
EXT_ON) pin for > 320ms
(PWR_ON = H).
PMU looks at PWR_DS bit.
Because PWR_DS=1,PMU
will begin Startup sequence
starting with LDO3 and
Buck2.
Charger on
LB comp on
PMU will force PWR_DS to 0.
Figure 5: Normal Mode  Deep-Sleep Mode  Normal Mode Flowchart.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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31
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Normal Mode
Buck1 on
If a trigger event occurs, SOC pulls
down PWR_EN which turns off Buck2,
LDO2, LDO4, and LDO5 simultaneously.
Buck2 on
Sleep Mode
Buck1 on
Buck2 off
LDO1 on
LDO1 on
LDO2 on
LDO2 off
LDO3 on
LDO3 on
LDO4 on
LDO5 on
SYSOUT on
If a trigger event occurs, PWR_EN
is asserted to turn on Buck2, LDO2,
LDO4, and LDO5 simultaneously.
LDO4 off
LDO5 off
SYSOUT on
Charger on
Charger on
LB comp on
LB comp on
Figure 6: Normal Mode  Sleep Mode Flowchart.
Shutdown
DS_RDY = 0
PWR_DS = 0
Startup
DS_RDY = 0
PWR_DS = 0
PWR_HOLD
is maintained high
Buck1 off
Buck2 off
Buck1 on
LDO1 off
Buck2 on
LDO2 off
LDO3 off
LDO4 off
LDO5 off
SYSOUT off
Charger off
User presses
pushbutton
connected to
PWR_ON pin
for >320ms.
(PWR_ON = H)
When LDO3
PMU begins
AND Buck2
Startup sequence
reach 90%
starting with LDO3
regulation, PMU
and Buck2
will turn on
LDO1 and
Buck1
LB comp off
LDO1 on
LDO2 off
LDO3 on
LDO4 off
LDO5 off
SYSOUT on
Charger on
LB comp on
If ADP and USB are
removed and the BAT
pin is < Low-Battery
threshold, the PMU will
automatically go back
into Shutdown mode.
All Regulators will be
turned off simultaneously.
All bucks will be in
Hi-Z mode.
Normal Mode
DS_RDY = 0
PWR_DS = 0
Buck1 on
Buck2 on
LDO1 on
SOC will pull up
PWR_EN pin to
turn on LDO2,
LDO4, and LDO5
simultaneously.
RESET is pulled high
LDO2 on
LDO3 on
LDO4 on
All LDOs will pull
down their outputs.
LDO5 on
SYSOUT on
Charger on
LB comp on
Figure 7: System Shutdown  Normal Mode (Initial Start-Up) Flowchart.
32
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
I2C Serial Interface and Programmability
Serial Interface
Many of the features of the AAT3608 can be controlled
via the I2C serial interface. The I2C serial interface is a
widely used interface where it requires a master to initiate all the communications with the slave devices. The
I2C protocol consists of 2 active wires, SDA (serial data
line) and SCL (serial clock line). Both wires are open
drain and require an external pull up resistor to VCC
(SYSOUT may be used as VCC). The SDA pin serves I/O
function, and the SCL pin controls and references the I2C
bus. I2C protocol is a bidirectional bus which allows both
read and write actions to take place. The timing diagram
in Figure 8 depicts the transmission protocol.
START and STOP Conditions
START and STOP conditions are always generated by the
master. Prior to initiating a START condition, both the SDA
and SCL pin are idle mode (idle mode is when there is no
activity on the bus and SDA and SCL are pulled to VCC via
external resistor). As depicted in Figure 9, a START condition is defined to be when the master pulls the SDA line
low and after a short period pulls the SCL line low. A
START condition acts as a signal to all ICs that something
is about to be transmitted on the BUS. A STOP condition,
also shown in Figure 9, is when the master releases the
bus and SCL changes from low to high followed by SDA
low to high transition. The master does not issue an
ACKNOWLEDGE and releases the SCL and SDA pins.
MSB
LSB
R/W
Figure 8: Bit Order.
Acknowledge Bit
The acknowledge bit is the ninth bit of data. It is used to
send back a confirmation to the master that the data has
been received properly. For acknowledge to take place,
the MASTER must first release the SDA line, then the
SLAVE will pull the data line low as shown in Figure 9.
The address is embedded in the first seven bits of the
byte. The eighth bit is reserved for the direction of the
information flow for the next byte of information. For the
AAT3608, this bit must be set to “0” when writing and
“1” when reading. The full 8-bit address including the
R/W bit is 0x9C (hex) or 10011100 in binary for writing
and 0x9D(hex) or 10011101 in binary for reading.
I2C Write Code
After sending the chip address, the master should
send an 8-bit data stream (“2ND Word”). The “2ND Word”
can consist of any one of the four sets of data listed in
Table 3.
The “3RD Word” should be entered into the I2C only if
(Bit7,Bit6,Bit5) = (0,0,0) in the “2ND Word”. In this case,
the bits (G2,G1,G0) are used to set the bit assignments
as shown in Tables 4 and 5.
Transferring Data
Every byte on the bus must be 8 bits long. A byte is
always sent with the most significant bit first (see Figure
8).
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33
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
I2C Address
START
R/W
A6 A5 A4 A3 A2 A1 0
ACK
9
0
2nd Word
0
0
0
0
0
1
x
x G2 G1 G0
ACK
G2:0=3'b000
D14 D13 D12 D11 D10
0
1
0
D24 D23 D22 D21 D20
0
1
1
D34 D33 D32 D31 D30
ACK
3rd Word
18
G2:0=3'b010
27
0
1
E15 E14 E13 E12 E11 E10
1
0
E25 E24 E23 E22 E21 E20
STOP
1
1
E35 E34 E33 E32 E31 E30
STOP
0
1
F15 F14 F13 F12 F11 F10
STOP
STOP
STOP
SCL
SDA
A6
A5
A0
START command
from the master.
START
W
A
0
01 or 10 or 11
Dx4
Dx0
Write command Acknowledge
from the master. from the slave.
A
Acknowledge
from the slave.
STOP
STOP command
from the master.
D1<4:0>
D2<4:0>
D3<4:0>
Data
Data
Data
Data
SCL
E1<5:0>
SDA
E2<5:0>
E3<5:0>
F1<5:0>
A<6: 0>
I2C Controller
Figure 9: I2C Protocol.
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0
0
0
0
0
0
1
1
0
1
0
1
0
ENLDO5
LDO51
BUCK24 and LDO34
0
ENLDO4
LDO50
BUCK23 and LDO33
G2
DS_RDY
LDO41
BUCK22 and LDO32
G1
PWR_DS
LDO40
BUCK21 and LDO31
G0
Reserved
ENCHG
BUCK20 and LDO30
Table 3: I2C “2nd Word” Bit Assignments.
34
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0
1
1
0
ENLDO3
PWR_IN IN Mask
ENLDO2
PWR_IN OUT Mask
ENLDO1
Reserved
ENBUCK1
LBO Mask
ENBUCK2
TIME OUT Mask
PWR_EN Mask
CHG DONE Mask
Table 4: I2C “3rd Word” Bit Assignments for (G2,G1,G0) = (0,0,0)
Bit7
Bit6
0
1
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Test Modes
Table 5: I2C “3rd Word” Bit Assignments for (G2,G1,G0) = (0,1,0).
BUCK24
LDO34
BUCK23
LDO33
BUCK22
LDO32
BUCK21
LDO31
BUCK20
LDO30
LDO3 Output Voltage
BUCK2 FB Voltage
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
X
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
X
1.000V
1.025V
1.050V
1.075V
1.100V
1.125V
1.150V
1.175V
1.200V (Default)
1.225V
1.250V
1.275V
1.300V
1.325V
1.350V
1.375V
1.400V
0.5000V
0.5125V
0.5250V
0.5375V
0.5500V
0.5625V
0.5750V
0.5875V
0.6000V (Default)
0.6125V
0.6250V
0.6375V
0.6500V
0.6625V
0.6750V
0.6875V
0.7000V
Table 6: Buck2 and LDO3 Output Voltage.
LDO41
LDO40
LDO4 Output Voltage
LDO51
LDO50
LDO5 Output Voltage
0
0
1
1
0
1
0
1
1.8V
2.5V (Default)
2.85V
3.3V
0
0
1
1
0
1
0
1
1.2V
1.5V
3.0V
3.3V (Default)
Table 7: LDO4 Output Voltage.
Table 8: LDO5 Output Voltage.
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35
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
ENCHG
Description
DS_RDY
Description
0
1
Turn off Battery Charger
Turn on Battery Charger (Default)
0
1
(Default)
Deep Sleep Recognition Flag
ENBUCK1
Description
PWR_DS
Description
0
1
Turn off Buck1
Turn on Buck1 (Default)
0
1
(Default)
Force PMU to go into Deep Sleep Mode
ENBUCK2
Description
PWR_EN Mask
Description
0
1
Turn OFF Buck2
Turn ON Buck2 (Default)
0
1
No Masking
Mask the PWR_EN pin ability to control BUCK2 (Default)
ENLDO1
Description
PWR_IN IN Mask
Description
0
Turn OFF LDO1
0
1
Turn ON LDO1 (Default)
1
No Masking
Prevent an interrupt from being generated if the
PWR_IN IN bit has been asserted (Default)
ENLDO2
Description
PWR_IN OUT Mask
Description
0
Turn OFF LDO2
Turn ON LDO2 only if PWR_EN pin is
High (Default)
0
No Masking
Prevent an interrupt from being generated if the
PWR_IN OUT bit has been asserted (Default)
ENLDO3
Description
LBO Mask
Description
0
Turn OFF LDO3
0
1
Turn ON LDO3 (Default)
1
No Masking
Prevent an interrupt from being generated if the LBO
comparator has been asserted (Default)
ENLDO4
Description
TIMEOUT Mask
Description
0
Turn OFF LDO4
0
1
Turn ON LDO4 (Default)
1
No Masking
Prevents an interrupt from being generated if the
TIMEOUT bit has been asserted (Default)
ENLDO5
Description
CHG_DONE Mask
Description
0
Turn OFF LDO5
0
1
Turn ON LDO5 (Default)
1
No Masking
Prevent an interrupt from being generated if the charger
has reached End-of-Charge (Default)
1
1
Table 9: Enable Settings.
Interrupt (Read from I2C)
The INT (interrupt) pin is an open drain output which
pulls low when there is an assertion in any one of the
status bits (except the DS_RDY and PWR_DS bits).
When a Read from the I2C is initiated AND completed by
the SOC, the INT pin is released and the voltage will go
high through the external pull-up resistor.
A single byte is used when reading I2C data from the
AAT3608. The R/W address should be set to 1 so that
complete address of the chip would be 0x9D or
10011101 in binary.
Bit7
Bit6
Bit5
Bit4
PWR_IN IN
PWR_IN OUT
Reserved
LBO
Bit3
Bit2
Bit1
Bit0
TIME OUT
CHG_DONE
DS_RDY
PWR_DS
Table 10: I C Read Table.
2
36
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
PWR_IN IN Bit
Description
Interrupt Signal
Produced?
0
1
Default
If VPWR_IN > UVLO threshold, this bit will be set
Only if PWR_IN IN Mask
bit is not set
PWR_IN OUT Bit
Description
Interrupt Signal
Produced?
0
1
Default
If VPWR_IN < UVLO threshold, this bit will be set
Only if PWR_IN OUT
Mask bit is not set
TIMEOUT Bit
Description
Interrupt Signal
Produced?
0
1
Default
If the charger watchdog timer has reached Timeout, this bit will be set.
Only if TIMEOUT Mask
bit is not set
LBO Bit
Description
Interrupt Signal
Produced?
0
1
Default
If Low-Battery comparator is tripped then this bit will be set.
Only if LBO Mask bit is
not set
CHG DONE Bit
Description
Interrupt Signal
Produced?
0
1
Default
If the Charger has reached End-Of-Charge (EOC), this bit will be set
Only if CHG_DONE
Mask bit is not set
DS_RDY Bit
Description
Interrupt Signal
Produced?
0
1
Default
Same as the DS_RDY bit described in the "I2C Write" section of this datasheet
PWR_DS Bit
Description
0
1
Default
Same as the PWR_DS bit described in the "I2C Write" section of this datasheet
No INT signal
Interrupt Signal
Produced?
No INT signal
Table 11: Status Bit Descriptions.
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37
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Application Information
Input Capacitor (Bucks)
The two bucks are high performance 800mA 1.5MHz
monolithic step-down converters. They have been
designed with the goal of minimizing external component size and optimizing efficiency over the complete
load range. Apart from the small bypass input capacitor,
only a small L-C filter is required at the output.
All input capacitors should be located as physically close
to the power pin (INBUCK) and power ground pins
(PGND1 and 2). Ceramic capacitors are recommended
for their higher current operation and small profile. Also,
ceramic capacitors are inherently capable to withstand
input current surges from low impedance sources such as
batteries in portable devices over tantalum capacitors.
Typically, 10V or 16V rated capacitors are required.
Both bucks can be programmed with external feedback
resistors to any voltage, ranging from 0.6V to the input
voltage in default feedback voltage condition.
At dropout, the step down converters duty cycle increases to 100% and the output voltage tracks the input voltage minus the RDSON drop of the P-channel high-side
MOSFET.
Output Voltage Resistor Selection
Resistors R2 through R5 in Figure 10 program the output
to regulate at a voltage higher than 0.6V in default
mode. The feedback voltage of Buck2 can have a wider
range and can be adjusted down to 0.5V through I2C. To
limit the bias current required for the external feedback
resistor string while maintaining good noise immunity, a
suggested value for R3 and R5 is 59kΩ to provide a bias
current of 10uA with a feedback voltage of 0.6V.
Although a larger value will further reduce quiescent
current, it will also increase the impedance of the feedback node, making it more sensitive to external noise
and interference. Table 12 summarizes the resistor values for various output voltages with R3 and R5 set to
either 59kΩ for good noise immunity or 100kΩ for
reduced no load input current.
VOUT
(V)
R3 and R5 = 59kΩ
R2 and R4 (kΩ)
R3 and R5 = 100kΩ
R2 and R4 (kΩ)
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.8
1.85
2
2.5
3.3
19.6
29.4
39.2
49.9
59
68.1
78.7
88.7
118
124
137
187
267
33.2
49.9
66.5
82.5
100
118
133
150
200
210
232
316
453
Table 12: Feedback Resistors
(Feedback Voltage = 0.6V).
38
The following are the typical recommended capacitance
values:
Two
One
One
One
One
10μF
10μF
10μF
10μF
10μF
capacitors for INBUCK
capacitor for INLDO
capacitor for SYSOUT
capacitor for PWR_IN
capacitor for BAT
Output Capacitor (Bucks)
For proper load voltage regulation and operational stability, a capacitor is required on the output of each buck.
The output capacitor connection to the ground pin
should be made as directly as practically possible for
maximum device performance. Since the bucks have
been designed to function with very low ESR capacitors,
a 4.7μF ceramic capacitor is recommended for best performance.
Inductor Selection
The two bucks use peak current mode control with slope
compensation to maintain stability for duty cycles greater than 50%. The output inductor value must be selected so the inductor current down slope meets the internal
slope compensation requirements. The internal slope
compensation is 1A/μs. The inductor should be set equal
to the output voltage numeric value in micro henries
(μH). This guarantees that there is sufficient internal
slope compensation.
Inductor manufacturer’s specifications list both the
inductor DC current rating, which is a thermal limitation,
and the peak current rating, which is determined by the
saturation characteristics. The inductor should not show
any appreciable saturation under normal load conditions. Some inductors may meet the peak and average
current ratings yet result in excessive losses due to a
high DCR. Always consider the losses associated with
the DCR and its effect on the total converter efficiency
when selecting an inductor.
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DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Input Capacitor (LDOs)
Layout Guidance
Typically, a 10μF or larger capacitor, C4 (see Figure 10),
is recommended as close as possible to the device
INLDO pin. The input capacitor value of 10μF will offer
superior input line transient response and will assist in
maximizing the highest possible power supply ripple
rejection.
Figure 10 is the schematic for the evaluation board. The
evaluation board has extra components for easy evaluation; the bill of materials for the system is shown in
Table 12. When laying out the PC board, the following
layout guidelines should be followed to ensure proper
operation of the AAT3608:
There is no specific capacitor ESR requirement; therefore ceramic, tantalum, or aluminum electrolytic capacitors may be selected for capacitor C4. However, ceramic
capacitors are recommended due to their inherent capability over tantalum capacitors to withstand input current surges from low impedance sources such as batteries in portable devices.
1. The exposed pad (EP) must be reliably soldered to
exposed copper pad on the board and electrically
connected to GND/PGND pins.
2. The power traces, including GND traces, the LX
traces and the VIN trace should be kept short, direct
and wide to allow large current flow. Use several via
pads when routing between layers.
3. The input capacitors should be connected as close as
possible from SYSOUT and INBUCK to PGND1 and
PGND2 to get good power filtering.
4. Keep the switching node LX away from the sensitive
buck feedback nodes, FB1 and FB2.
5. The feedback trace for the bucks should be separate
from any power trace and connected as closely as
possible to the load point. Sensing along a high current load trace will degrade DC load regulation.
6. The output capacitors and inductors should be connected as close as possible and there should not be
any signal lines under the inductor.
7. The resistance of the trace from the load return to
PGND1 and PGND2 should be kept to a minimum.
This will help to minimize any error in DC regulation
due to differences in the potential of the internal
signal ground and the power ground.
Output Capacitor (LDOs)
For proper load voltage regulation and operational stability, a 4.7µF ceramic capacitor is required between the
output of the LDOs and GND. If desired, the output
capacitor may be increased without limit. The output
capacitor connection to the LDO regulator ground pin
should be made as direct as practically possible for
maximum device performance.
Although the device is intended to operate with low ESR
capacitors, it is stable over a very wide range of capacitor ESR, thus it will also work with higher ESR tantalum
or aluminum electrolytic capacitors. However, for best
performance, ceramic capacitors are recommended.
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39
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
J1
VIN
C3
10µF
VIN
1
2
TB-2
PWR_ID
USBSEL
S2
S1
PGND
VBAT
1
2
EXT_ON
TB-2
J5
PGND
18
19
EXT_ON
34
PWR_ON
33
PWR_HOLD 32
PWR_EN
20
30
31
TS
GND GND GND
J25 J24 J28 J29
GND
PGND
Star Ground is the Exposed Pad:
Connect all Ground Planes at the
Exposed Pad
29
U1
AAT3608
28
SDA
SCL
3
TS
27
PBSTAS
LX2
INT
STAT
FB2
LBO
15
LBI
LBO
16
LBI
2
ISETA
4
TC
C12
0.1µF
17
PGND1
26
RESET
3
PGND
R3
100K
L1 2.2µH
LDO3
7
LDO4
10
R4
100K
J8
LDO2
LDO3
LDO1
J9
LDO5
R15
2M
S1
PWR_EN
PWR_ID
USBSEL
S2
S1
12
11
10
9
8
7
J15
LBI
LBI
R16
1M
C9
100pF
TB4
TB-2
PGND2
LDO5
C17
4.7µF
C16
4.7µF
PGND1 PGND2
J13
VBAT
R14
100K
J16
LBO
LBO
PGND
TS
1M 1M 1M 1M 1M
PGND
R20
1M
J20
PBSTAS
PBSTAS
R21
100K
R12
10K
xRESET
SYSOUT
J19
PWR_HOLD
3
PGND
D1
R19
1.5K LED2
VBAT
J17
3-PIN_JUMPER
SYSOUT
J21
1
2
R7 R8 R9 R10 R11
SYSOUT
PGND
BUCK1
TS
PGND
SYSOUT
SYSOUT
J14
R13
10K
R17
10K
J18
STAT
VIO
R18
10K
INT
INT
SCL
STAT
C19
100pF
C18
100pF
SDA
P1
1
3
5
7
9
RESET
Figure 10: AAT3608 Evaluation Board Schematic.
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2
4
6
8
10
Header 5X2
PGND
40
1
2
LDO4
J12
C15
4.7µF
GND
C10
J23
4.7µF
PGND
LDO3
J11
Buck 2
R5
100K
LDO2
J10
LDO4
C13
4.7µF
J6
BUCK2
LDO1
11
PGND1
PGND
L2 2.2µH
TB-2
VBAT
SYSOUT
SW DIP-6
LX2
GND
C8
J22
4.7µF
TB3
PWR_ON
3-PIN_JUMPER
1
2
3
4
5
6
PGND
R2
316K
P35,36
1
2
3
2
J27
C14
4.7µF
PWR_ON
J7
LX1
Buck 1
BUCK1
FB = 0.6V
SW1
1
P24
8
5
22
SYSOUT
C7
10µF
21
LDO2
LDO5
PGND2
P24
23
LDO1
GND
P6,9
C6
10µF
PGND PGND2 PGND1 PGND
13
RESET
14
1
C5
10µF
J26
FB1
INT
STAT
VBAT
24
9
6
25
12
C4
10µF
J3
J4
SYSOUT
36
35
LX1
PBSTAS
R6
1.24K
SYSOUT
PGND
38
PWR_IN PWR_IN BAT BAT
PWR_ID
SYSOUT
USBSEL
SYSOUT
S2
S1
INBUCK
INLDO
EXT_ON
INLDO
PWR_ON
PWR_HOLD
PWR_EN
37
40
SDA
SCL
39
1
TB2
C2
10µF
C1
0.1µF
PGND
VBAT
2
TB1
J2
VBAT
VIN
PGND
PGND
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Figure 11: AAT3608 Evaluation Board Silk Screen Layer.
Figure 12: AAT3608 Evaluation Board Top Layer.
Figure 13: AAT3608 Evaluation Board Mid Layer 1 (GND Plane).
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
41
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Figure 14: AAT3608 Evaluation Board Figure 15: AAT3608 Evaluation Board
Mid Layer 2 (SYSOUT).
Bottom Layer.
Description
Quantity
Footprint
U1
J1, J2, J3, J4, J5, J6, J8, J9,
J10, J11, J12, 13, J14,J15, J16,
J18, J20, J21, J22, J23, J24,
J25, J26, J27, J28, J29
Battery Charger PMU
1
TQFN55-40L
Test Point
26
TP
4
TBLOK2
1
SW-2
1
3
1
2
1
6
1
2
6
3
4
1
1
1
5
1
7
HDR2X5
HDR1X3
DIP-12/SW
CDRH4D16
1206LED - duplicate
0805
0805
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
TB1, TB2, TB3, TB4
SW1
P1
J7, J17, J19
S1
L1, L2
D1
C2, C3, C4, C5,C6,C7
C8
C1, C12
C10, C13, C14, C15, C16, C17
C9, C18, C19
R12, R13, R17, R18
R15
R19
R2
R3, R4, R5, R14, R21
R6
R7, R8, R9, R10, R11, R16, R20
Terminal Block Connector 2 Positions DigiKey 277-1273-ND
Switch Tact, SPST, 5mm - C&K Components
PTS645TL50 LFS
Header, 5-Pin, Dual row
1X3 Header
DIP Switch, 6 Position, SPST
Inductor
Typical red, green, yellow, amber GaAs LED
Ceramic Capacitor
Ceramic Capacitor
Ceramic Capacitor
Ceramic Capacitor
Ceramic Capacitor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Value
2.2µH
10µF
4.7µF
0.1µF
4.7µF
100pF
10K
2M
1.5K
316K
100K
1.24K
1M
Table 12: AAT3608 Evaluation Board Bill of Materials (BOM).
42
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2, 3
TQFN55-40
C8XYY
AAT3608IIC-1-T1
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
Package Information
TQFN55-404
Pin 1 Dot
by Marking
Pin 1 Identification
Chamfer 0.300 x 45°
0.200 ± 0.050
0.400 BSC
3.600 ± 0.050
5.000 ± 0.050
0.380 ± 0.050
0.450 ± 0.050
5.000 ± 0.050
3.600 ± 0.050
Top View
Bottom View
0.750 ± 0.050
0.203 REF
+ 0.100
0.000
- 0.000
Side View
All dimensions in millimeters.
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
3. Available exclusively outside of the United States and its territories.
4.The leadless package family, which includes QFN, TQFN, DFN, TDFN and STDFN, has exposed copper (unplated) at the end of the lead terminals due to the manufacturing
process. A solder fillet at the exposed copper edge cannot be guaranteed and is not required to ensure a proper bottom solder connection.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012
43
DATA SHEET
AAT3608
Compact Seven-Channel Regulator
with Li+/Polymer Linear Battery Charger and I2C Interface
Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved.
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44
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202214A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 26, 2012