ANALOGICTECH AAT2610

PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
General Description
Features
The AAT2610 is a highly integrated power management
solution specifically suited for Digital Still Camera (DSC)
systems, featuring seven DC-DC switching regulators for
maximum operating efficiency.
• Input Voltage Range 1.6 to 5.5V
▪ 1-Cell Li-ion, 2-Cell Alkaline
▪ Adapter or USB Inputs
• 7 Channel up to 96% High Efficiency DC/DCs
▪ Adjustable Output
▪ 4 Channel Synchronous Rectification
▪ Light Load Mode for High Efficiency
• <1μA Total Quiescient Current
• Current Mode Control
▪ Fast, Stable Transient Response
▪ No External Compensation
▪ Current Limit for Internal MOSFET Protection
• High Frequency 1.5MHz System Clock
• High Voltage Series LED Driver
▪ 1 to 6 White LEDs
▪ External Schottky Diode
▪ ±10% Accuracy Current Sink
▪ Integrated OVP
▪ PWM Dimming: 1k to 30kHz, 10 to 100% Duty
Cycle
• Step-Up and Inverting Outputs for CCD
▪ Low Noise Outputs
▪ Transformerless Inverter Output
• Flexible Sequencing Implementation
▪ Independent Enable Control
▪ 10ms Pre-Programmed Buck or Boost Delay
• Integrated Soft-Start
• Over-Voltage and Over-Temperature Protection
• Pb-free TQFN55-40L Package
• Temperature Range: -40°C to +85°C
The input operating voltage range is 1.6 to 5.5V, making
the device an ideal solution for 1-cell Li-ion batteries,
2-cell alkaline batteries, and USB and regulated AC-DC
wall adapters. All seven DC-DC switching regulators feature high efficiency light load operating mode to extend
battery life while in low power standby state.
Three different DC-DC building blocks provide maximum
design flexibility: a boost (step-up) DC-DC controller
with an output voltage range of 3.0V to 5.5V and a current mode control buck (step-down) or boost (step-up)
DC-DC controller with an output voltage range of 2.5V to
the step-up converter (SU) output voltage and buck output range of 0.6V to VIN. Dual current mode control synchronous buck regulators provide low voltage, low noise
outputs required for system logic and memory. Output
voltage range is 0.6V to VIN. The Auxiliary 1 boost (stepup) is ideally suited for LCD backlight and can drive 1-6
white LEDs with ±10% accuracy. PWM input controls LED
dimming across the frequency range from 10% to 100%
duty cycle. The integrated OVP and SCF feature protects
the device from open-circuit LED conditions.
The Auxiliary 2 boost (step-up) and Auxiliary 3 buckboost (inverting) output provide low noise (≤30mVpp)
+15V and -7.5V outputs for CCD loads. An expensive
transformer is not required.
No external MOSFETs and low profile TQFN55-40L package are ideal to save space for DSC solution. Integrated,
low RDS(ON) power MOSFETs provide output voltages from
0.6V to 16VDC and an inverting output up to -10V. The
high switching frequency ensures small external filtering
components. Internal compensation is provided for optimum transient performance and minimum application
design effort.
2610.2008.11.1.1
Applications
• DSCs and DVCs
• MP3 Players
• PMP
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1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Applications
+VBATT
4.7μF
EN
SU
1 Li-ion
Cell
ENM
EN
SD1
EN ENL1 ENL2
SD2 (Dimming)
ENL3
I/O, Control
SUSD
VIN
(3.3V-4.2V)
VSU
5V, 920mA
PV
PVSU
SCF
22μF
0805
OT
Osc
4.7μH
(1.5MHz)
StepUp/
Bypass
Control
2.2μH
432kΩ
LXSU
59.0kΩ
FBSU
VSU
VAUX_L1
16V, 20mA
PVL
+VBATT
PVM
1μF/25V
0603
LXL1
1.54MΩ
2-4WLED
59.0kΩ
Step-Up
Control
&
Current
Sink
StepUp/
Down
Control
VM
3.3V, 150mA
LXM
3.3μH
4.7μF
0603
FBM
CSL1
267kΩ
OVL1
59.0kΩ
/SEQ
VAUX_L2
15V, 20mA
+VBATT
+VBATT
PVSD1
4.7μF/25V
0805
1μF
VSD1
2.5V, 200mA
4.7μH
LXL2
1.42MΩ
Step-Up
Control
StepDown
Control
LXSD1
2.5μH
4.7μF
0603
59.0kΩ
FBL2
187kΩ
FBSD1
59.0kΩ
+VBATT
VSU
PVSD2
1μF
1μF
PVL3
VAUX_L3
-7.5V, 20mA
Step-Up
Control
StepDown
Control
VSD2
1.8V, 200mA
LXSD2
4.7μF
0603
1.8μH
LXL3
4.7μF/10V
0603
118kΩ
FBSD2
732kΩ 4.7μH
59.0kΩ
59.0kΩ
FBL3
VREF3
1μF
0603
PG PG PG PG PG
SU M SD1 SD2 L GND
1. Single Cell Li-ion Battery Input, 5V Motor.
2
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
+VBATT
ENL1
ENSU ENM ENSD1 ENSD2 (Dimming) ENL2 ENL3
4.7μF
VIN
2 Alk
Cell
I/O, Control
PV
SUSD
VSU
5V, 800mA
(1.6-3.3V)
PVSU
22μF
0805
SCF
OT
Osc
4.7μH
(1.5MHz)
2.2μH
StepUp/
Bypass
Control
432kΩ
LXSU
59.0kΩ
FBSU
VSU
VAUX_L1
16V, 20mA
PVL
PVM
22μF
0805
Step-Up
Control
&
Current
Sink
LXL1
1.54MΩ
2-4WLED
59.0kΩ
2.2μH
StepUp/
Down
Control
267kΩ
LXM
59.0kΩ
FBM
CSL1
VMAIN
3.3V, 150mA
OVL1
/SEQ
VAUX_L2
15V, 20mA
+VBATT
2.2μF
0402
PVSD1
4.7μF/25V
0805
1μF
VSD1
2.5V, 200mA
4.7μH
Step-Up
Control
LXL2
1.42MΩ
StepDown
Control
LXSD1
2.5μH
4.7μF
0603
59.0kΩ
FBL2
187kΩ
FBSD1
59.0kΩ
PVSD2
+VBATT
1μF
1μF
Step-Up
Control
PVL3
VAUX_L3
-7.5V, 20mA
VSD2
1.8V, 200mA
StepDown
Control
LXSD2
4.7μF
0603
1.8μH
LXL3
4.7μF/10V
0603
118kΩ
732kΩ
FBSD2
4.7μH
59.0kΩ
59.0kΩ
FBL3
VREF3
1μF
0603
PGSU
PGM
PGSD1
PGSD2
PGL
GND
2. Dual Cell Alkaline Battery Input, 5V Motor.
2610.2008.11.1.1
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3
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Pin Descriptions
4
Number
Symbol
1
FBL2
2
FBSD1
3
PVSD1
4
LXSD1
5
6
PGSD1
PGM
7
LXM
8
PVM
9
FBM
10
SEQ
11
SUSD
12
ENL3
13
ENL2
14
ENL1
15
16
17
VIN
GND
PV
18
ENSD2
19
ENSD1
20
ENM
21
ENSU
Description
Auxiliary 2 (AUX_L2) boost converter feedback pin. This pin is high impedance when the AUX2 controller
is disabled. Connect an external resistor divider between this pin and AUX2 output and GND to set the
AUX2 output voltage with 0.6V.
Step-down 1 (SD1) buck converter feedback pin. This pin is high impedance when the SD1 controller is
disabled. Connect an external resistor divider between this pin and SD1 output and GND to set the SD1
output voltage with 0.6V.
Step-down 1 (SD1) buck converter input pin. Bypass to GND plane with a 1μF ceramic capacitor.
Step-down 1 (SD1) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD1 converter is disabled.
Step-down 1 (SD1) buck converter power ground. Tie this pin to ground plane.
Main (SUD) converter power ground. Tie this pin to ground plane.
If is SUSD pulled high, the Main is a boost (step-up) converter and the pin functions as the Main converter
switching node. In this case, connect this pin to the external inductor.
If SUSD is pulled low, the Main is a buck (step-down) converter and the pin functions as the Main converter
switching node. In this case, connect this pin to the external inductor.
In either case, LXM is high impedance when the Main converter is disabled.
If SUSD is pulled high, the Main is a boost (step-up) converter and this pin functions as the Main converter
output. In this case, connect a ceramic capacitor to GND plane from this pin.
If SUSD is pulled low, the Main is a buck (step-down) converter and this pin functions as the Main converter
input voltage. In this case, connect this pin to the external inductor.
Main (M) buck or boost converter feedback pin. This pin is high impedance when the Main controller is
disabled. Connect an external resistor divider between this pin and Main output and GND to set the Main
output voltage with 0.6V.
Main (M) converter open-drain output sequencing pin. This pin is internally pulled low after both SD1 and
SD2 converters completed soft-start and achieved output regulation. This pin can provide gate drive to
external P-channel MOSFETs which disconnect the load during start-up. This pin is open-circuit during
shut-down, overload or during OT trip conditions.
Main converter configuration pin. Tie this pin to high to configure the Main output as a boost (step-up)
converter, or tie this pin to low to configure the Main output as a buck (step-down) converter. This pin
cannot be toggled during operation.
Auxiliary 3 (AUX_L3) buck-boost (inverting) converter active high enable pin. The AUX_L3 output remains
disabled until 2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-down resistor.
Auxiliary 2 (AUX_L2) boost converter active high enable pin. The AUX_L2 output remains disabled until
2,048 clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pulldown resistor.
Auxiliary 1 (AUX_L1) boost converter active high enable pin. The Main output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. The pin has an internal 330kΩ pull-down
resistor. This pin also functions as PWM input for the LED dimming feature. The input PWM frequency is
logic level high and low within 1kHz to 30kHz frequency. PWM dimming input duty cycle (ON-time/TOTALtime) range is from 10% to 100%.
Input voltage. Tie this pin to the input of step-up (SU).
Chip ground. Tie this pin to ground plane.
Power input for the PMIC. Connect this pin directly to the PVSU pin.
Step-down 2 (SD2) buck converter active high enable pin. The SD2 output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down
resistor.
Step-down 1 (SD1) buck converter active high enable pin. The SD1 output remains disabled until 2,048
clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pull-down
resistor.
Main buck or boost converter active high enable pin. However, the Main output remains disabled until
2,048 clock cycles after Step-Up (SU) output has reached regulation. This pin has an internal 330kΩ pulldown resistor.
Step-up (SU) boost converter active high enable pin. This pin has an internal 330kΩ pull-down resistor.
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Pin Descriptions
Number
Symbol
22
SCF
23
FBSU
24
PVSU
25
LXSU
26
27
PGSU
PGSD2
28
LXSD2
29
PVSD2
30
FBSD2
31
VREF3
32
FBL3
33
PVL3
34
LXL3
35
PVL
36
LXL2
37
PGL
38
LXL1
39
CSL1
40
OVL1
EP
2610.2008.11.1.1
Description
Open drain, active low, short circuit flag output. SCF goes open when overload protection or AUX_L1 open
circuit occur during abnormal operation or during startup. SCF can drive P-channel MOSFETs to disconnect
a given output from the load.
Step-up (SU) boost converter feedback pin. This pin is high impedance when the SU controller is disabled.
Connect an external resistor divider between this pin and SU output and GND to set the SU output voltage
with 0.6V.
Step-up (SU) boost converter input.
Step-up (SU) boost converter switching node. Connect this pin to the external inductor and anode of the
Schottky rectifying diode. This pin is high impedance when the SU converter is disabled.
Step-up (SU) boost converter power ground. Tie this pin to ground plane.
Step-down 2 (SD2) buck converter power ground pin. Tie this pin to ground plane.
Step-down 2 (SD2) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD2 converter is disabled.
Step-down 2 (SD2) buck converter input pin. Bypass this pin to GND plane with a 1μF ceramic capacitor.
Step-down 2 (SD2) buck converter feedback pin. This pin is high impedance when the SD2 controller is
disabled. Connect an external resistor divider between this pin and SD2 output and GND to set the SD2
output voltage with 0.6V.
Auxiliary 3 (AUX_L3) buck/boost (inverting) reference voltage pin. Bypass VREF3 to GND with a 1μF or
greater capacitor. Connect an external resistor divider between this pin and L3 output and FBL with 0.6V.
Auxiliary 3 (AUX_L3) boost converter feedback pin. The pin is high impedance when the AUX_L3 controller is disabled. Connect an external resistor divider between this pin and AUX_L3 output and VREF3 pin to
set the AUX_L3 negative buck/boost (inverting) output voltage with 0V.
Auxiliary 3 (AUX_L3) buck/boost (inverting) input node. Connect this pin to the input ceramic capacitor.
Auxiliary 3 (AUX_L3) buck/boost (inverting) switching node. Connect this pin to the cathode of the external Schottky diode and buck/boost inductor.
Power input for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to PVSU.
Auxiliary 2 (AUX_L2) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
Power ground for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to ground
plane.
Auxiliary 1 (AUX_L1) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
Auxiliary 1 (AUX_L1) boost converter current sink pin. The pin is high impedance when the AUX_L1 controller is disabled. Connect this pin to the cathode of the bottom LED in the string to ensure DC current
flow. Current level is programmed by the internal RSET resistor from 1 to 20mA.
Auxiliary 1 (AUX_L1) boost (step-up) over-voltage protection pin. Connect an external resistor divider between this pin and AUX_L1 output voltage and GND to set the AUX_L1 over-voltage threshold with 0.6V.
Exposed pad (bottom). Connect to ground directly beneath the package for thermal dissipation.
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PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Pin Configuration
VREF3
FBL3
PVL3
LXL3
PVL
LXL2
PGL
LXL1
CSL1
OVL1
31
32
33
34
35
36
37
38
39
40
1
30
2
29
3
28
4
27
5
26
6
25
7
24
8
23
9
22
10
21
20
19
18
17
16
15
14
13
12
11
FBL2
FBSD1
PVSD1
LXSD1
PGSD1
PGM
LXM
PVM
FBM
SEQ
FBSD2
PVSD2
LXSD2
PGSD2
PGSU
LXSU
PVSU
FBSU
SCF
ENSU
ENM
ENSD1
ENSD2
PV
GND
VIN
ENL1
ENL2
ENL3
SUSD
Absolute Maximum Ratings1
Symbol
Description
All other pins to GND/PGND
Voltage from LXL1, LXL2 to GND/PGND
Voltage from LXL3 to GND/PGND
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Value
Units
-0.3 to 6.0
-0.3 to 30.0
-8.0 to 6.0
-40 to 150
300
V
V
V
°C
°C
Value
Units
2.0
25.0
W
°C/W
Thermal Information2
Symbol
PD
θJA
Description
Maximum Power Dissipation
Maximum Thermal Resistance
3
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. Mounted on 1.6mm thick FR4 circuit board.
3. Derate 40mW/°C above 2°C ambient temperature
6
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Electrical Characteristics1
Unless otherwise noted VPVSU = VPVM= VPVSD1 = VPVSD2 = 3.6V, TA =-40°C to +85°C.
Symbol
General
VIN
ISHDN
Description
Conditions
Operating Input Voltage Range
ILOAD ≤ Full Load (see Tables 1 and 2)
EN_SU = EN_M = EN_SD1 = EN_SD2 = 0V,
EN_DL1 = EN_DL2 = EN_DL3 = 0V
EN_SU = 3.6V, FBSU = 1.5V (does not include
switching losses)
EN_SU = EN_SD1 = EN_SD2 = 3.6V, FBSU =
FBSD1 = FBSD2 = 1.5V, EN_M = EN_DL1 = EN_
DL2 = EN_DL3 = 0V (does not include switching
losses)
EN_SU = EN_M = 3.6V, FBSU = FBSUD = 1.5V,
EN_SD1 = EN_SD2 = EN_DL1 = EN_DL2 = EN_
DL3 = 0 (does not include switching losses)
EN_SU = EN_DL1 = 3.6V, FBSU = FBL1 = 1.5V,
EN_M = EN_SD1 = EN_SD2 = EN_DL1 = EN_DL2
= EN_DL3 = 0(does not include switching losses)
Shutdown Supply Current
Quiescient Current into PV Pin
with SU Enabled
Quiescient Current into PV Pin
with SU/SD1/SD2 Enabled
IQ
Quiescient Current into PV Pin
with SU/SUD Enabled
Quiescient Current into PV Pin
with
Oscillator
Oscillator Frequency Range
FOSC
SU DC-DC Boost (Step-Up) Converter
SU Under-Voltage Threshold
VUVLO(SU)
SU Under-Voltage Threshold
VUVLO(SU),HYS
Hysteresis
Step-Up Output Voltage Range
VOUT(SU)
Enter Bypass Mode
VIN(BP-ENTER)
VIN-HYS(BP-EXIT) Exit Bypass Mode - Hysteresis
Start-Up Delay of SUSD, SD1,
SD2, AUX_L1, AUX_L2, AUX_
tDELAY
L3 after VSU in Regulation
VFBSU
IMODE(SU)
DMAX(SU)
ILEAK(FBSU)
ILEAK(PVSU)
ILEAK(LXSU)
RDSON
ILIMIT
IOFF
ISTARTUP
TOFF(STARTUP)
FOSC(STARTUP)
FBSU Reference Voltage
SU Light Load Mode Current
Threshold
Step-Up Maximum Duty Cycle
FBSU Pin Leakage Current
PVSU Pin Leakage Current
LXSU Pin Leakage Current
N-Channel
P-Channel
N-Channel Current Limit
P-Channel Turn-Off Current
Startup Current Limit
Startup Off-Time
Startup Frequency
Rising edge
Min
Max
Units
5.5
V
0.01
10
μA
300
450
μA
600
900
μA
450
700
μA
400
650
μA
1.2
1.5
1.8
MHz
1.6
1.8
2.0
V
1.6
Falling edge
VIN Rising edge
VIN Falling edge
Typ
400
3.0
4.625
100
4.750
112
mV
5.5
4.900
125
OSC
Cyc
512
TA = 25°C
0.588
0.600
0.612
200
1.6 ≤ VPVSU ≤ 5.0V, VFBSU = 0.60V
VFBSU = 0.60V
VLXSU = 0V, VPVSU = 5.5V
VLXSU = VOUT(SU) = 5.5V
85
-100
4.1
VPVSU = 1.8V
VPVSU = 1.8V
VPVSU = 1.8V
95
0.01
0.1
0.1
50
130
4.8
20
750
700
200
V
V
mV
V
mA
+100
5
5
%
nA
μA
μA
mΩ
mΩ
A
mA
mA
ns
kHz
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls.
2610.2008.11.1.1
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PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Electrical Characteristics1
Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.
Symbol
Description
Conditions
Main DC-DC Buck (Step-Down) or Boost (Step-Up) Converter
Main Output Step-Up Voltage Range
VSUSD = VPVSU
VOUT(M)
Main Output Step-Down Voltage Range
FBM Reference Voltage
Step-Up Mode Current Limit
ILIMIT(M)
Step-Down Mode Current Limit
Step-Up Light Load Mode Current
Threshold
IMODE(M)
Step-Down Light Load Mode Current
Threshold
Step-Up Maximum Duty Cycle
DMAX(M)
Step-Down Maximum Duty Cycle
FBM Pin Leakage Current
ILEAK(FBM)
LXM Pin Leakage Current
ILEAK(LXM)
N-Channel
RDSON
P-Channel
Step-Up Mode N-Channel Turn-Off
Current
IOFF(M)
Step-Down Mode N-Channel Turn-Off
Current
Soft-Start Interval
tSOFT-START
Sequencing Time Delay
TSEQ
SEQ Pin Leakage Current
ILEAK(SEQ)
SEQ Low Output Voltage
VSEQ(L)
SD1/2 DC-DC Step-Down (Buck) Converters
SD1/SD2 Step-Down Output Voltage
VOUT(SD1/SD2)
Range
FBSD1, FBSD2 Reference Voltage
VFB(SD1/SD2)
P-Channel Current Limit
ILIMIT(SD1/SD2)
IMODE(SD1/SD2) SD1 Light Load Mode Current Threshold
Maximum Duty Cycle
DMAX(SD1/SD2)
ILEAK(FBSD1/SD2) FBSD1, FBSD2 Pin Leakage Current
ILEAK(LXSD1/SD2) LXSD1, LXSD2 Pin Leakage Current
N-Channel
RDSON(SD1)
P-Channel
N-Channel
RDSON(SD2)
P-Channel
N-Channel Turn-Off Current
IOFF
Soft-Start Interval
TSOFTSTART
VFBM
VSUSD = GND; VPVM must be greater than
VOUT(M)
TA = 25°C
VSUSD = VPVSU
VSUSD = GND
Min
Max
Units
3.0
5.5
V
1.0
VIN
V
0.61
V
A
A
0.59
1.5
0.7
Typ
0.60
1.75
0.85
VSUSD = VPVSU
200
mA
VSUSD = GND
100
mA
1.6 ≤ VIN ≤ 5.0V, VSUSD = VPVSU
1.6 ≤ VIN ≤ 5.0V, VSUSD = GND
VFBSU = 0.6V
VLXSU = VOUT(M) = 5.5V
80
100
-100
95
0.01
0.1
75
120
VSUSD = VPVSU
20
VSUSD = GND
20
%
+100
5
nA
μA
mΩ
mΩ
mA
2,048
10,000
0.1
0.01
SD1/SD2 Regulation to VSEQ(L) Transition
EN_SU = VPVSU, FBSU = 1.5V
0.1mA into SEQ pin
1
0.1
OSC Cyc
OSC Cyc
μA
V
VIN
V
0.60
0.7
100
0.61
0.01
0.1
500
650
250
450
20
2,048
+100
5
V
A
mA
%
nA
μA
mΩ
mΩ
mΩ
mΩ
mA
OSC Cyc
0.60
TA = 25°C
0.59
0.6
1.6 ≤ VPVSU ≤ 5.0V, VSD1/2 = 0.60V
VFBSD1/SD2 = 0.6V
VLXSD1/SD2 = 0 to 3.6V
100
-100
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls.
8
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Electrical Characteristics1
Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.
Symbol
Description
Conditions
AUX L1/L2 DC-DC Boost (Step-Up) Converters
AUX_L1/L2 Step-Up Output Voltage
VOUT(AUX_L1/L2)
Range2
ICSL1
CSL1 Current Sink Accuracy
VFBL2
FBL2 Reference Voltage
VOVL1
OVL1 Reference Voltage
ILIMIT(AUX_L1)
N-Channel Current Limit
N -Channel Current Limit
ILIMIT(AUX_L2)
AUX_L1/L2 Light Load Mode Current
IMODE(AUX_L1/L2)
Threshold
Maximum Duty Cycle
DMAX(L1/L2)
FBL2 Pin Leakage Current
ILEAK(FBL2)
N-Channel
RDSON(AUX_L1)
N-Channel
RDSON(AUX_L2)
TSOFTSTART(AUX_L2) AUX_L2 Soft-Start Interval
AUX L3 DC-DC Buck/Boost (Inverter) Converters
VREF3
REF3 Reference Voltage
VFBL3
FBL3 Inverter Reference Voltage
P-Channel Current Limit
ILIMIT(AUX_L3)
SD1 Light Load Mode Current Threshold
IMODE(AUX_L3)
REF3, FBL3 Pin Leakage Current
ILEAK(REF3,FBL3)
P-Channel
RDSON
Soft-Start Interval
tSOFTSTART
Overload Protection
tDELAY(SCF)
Overload Fault Delay
ILEAK(SCF)
SCF Pin Leakage Current
VL(SCF)
SCF Low Output Voltage
Thermal Protection
Over-Temperature Shutdown
TSD
Over-Temperature Shutdown Hysteresis
THYS
Min
Typ
5.0
TA = 25°C
TA = 25°C
TA = 25°C
18.0
0.59
0.59
0.60
0.60
20.0
0.60
0.60
0.70
0.70
Max
Units
20.0
V
22.0
0.61
0.61
mA
V
V
A
A
100
95
-100
TA = 25°C, IREF = 20μA
TA = 25°C
0.59
-0.01
-100
EN_SU = VPVSU, FBSU = 1.5V
0.1mA into SCF pin
mA
0.01
1000
1000
2,048
+100
0.60
0.00
1.5
100
0.01
1000
2,048
0.61
0.01
100,000
0.1
0.01
140
15
+100
1
0.1
%
nA
mΩ
mΩ
OSC Cyc
V
V
A
mA
nA
mΩ
OSC Cyc
OSC Cyc
μA
V
°C
°C
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls.
2. The Step-Up converter operates in startup mode until this voltage is reached. Do not apply full load current during startup.
2610.2008.11.1.1
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9
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Electrical Characteristics1
Unless otherwise noted VPVSU=VPVM= VPVSD1= VPVSD2 =3.6V, TA=-40°C to +85°C.
Symbol
Description
Conditions
Min
Typ
Max
Units
0.2
0.4
0.5
V
V
V
V
V
V
V
μA
kΩ
Logic Inputs
VL(EN_SU)
EN_SU Logic Low Threshold
VH(EN_SU)
EN_SU Logic High Threshold
VEN_x(L), VSUSD(L)
VEN_x(H), VSUSD(H)
ILEAK(SUSD)
RENx
EN_x, SUSD Logic Low Threshold
EN_x, SUSD Logic Low Threshold
SUSD Pin Leakage Current
ENx Input Impedance
TEN_L1(L)
Disable Low Time
TEN_L1(H)
Enable High Time
TEN_L1(DIS-L)
Disable Low Time
1.1V
1.8V
2.5V
1.1V
1.8V
2.7V
2.7V
<
≤
≤
<
<
<
<
VPVSU
VPVSU
VPVSU
VPVSU
VPVSU
VPVSU
VPVSU
<
<
<
<
<
<
<
1.8V
2.5V
5.5V
1.8V
5.5V
5.5V
5.5V
Dimming state: EN low to LED
Disable; 2.7V < VIN < 5V
Dimming state: EN high to LED
Regulation; 2.7V < VIN <5V
Disables Dimming state: Softstart enabled on subsequent EN
transition; 2.7V < VIN < 5V
(VPVSU - 0.2)
1.6
0.5
1.6
0.1
330
1
2
3
4
μs
2
3
4
μs
1200
μs
1000
1. The AAT2610 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls.
10
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
SU Efficiency vs. Output Current
MSD Efficiency vs. Output Current
(VSU = 5V; L = 2.2μH; COUT = 22μF)
(VPVM = VBAT; VMSD= 3.3V; L = 3.3μH; COUT = 4.7μF)
100
95
Efficiency (%)
Efficiency (%)
90
85
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
80
75
70
65
60
55
50
1
10
100
1000
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
1
100
1000
MSU Efficiency vs. Output Current
SD1 Efficiency vs. Output Current
(VMSU = 3.3V; L = 2.2μH; COUT = 10μF)
(VPVSD1 = VBAT; VSD1 = 2.5V; L = 2.2μH; COUT = 10μF)
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
100
95
90
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
85
80
75
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
70
65
60
55
50
1
10
100
1000
1
Output Current (mA)
10
100
SD2 Efficiency vs. Output Current
SD2 Efficiency vs. Output Current
(VPVSD2 = VBAT; VSD2 = 1.8V; L = 2.2μH; COUT = 4.7μF)
(VSD2 = 1.2V; L = 2.2μH; COUT = 4.7μF)
100
95
95
90
90
85
85
80
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
75
70
65
60
55
50
1
10
100
80
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
75
70
65
60
55
50
1000
Output Current (mA)
2610.2008.11.1.1
1000
Output Current (mA)
Efficiency (%)
Efficiency (%)
10
Output Current (mA)
Efficiency (%)
Efficiency (%)
Output Current (mA)
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
1
10
100
1000
Output Current (mA)
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PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
AUX2 Efficiency vs. Output Current
(VAUX2 = +15V; L = 4.7μH; COUT = 4.7μF)
90
90
80
85
70
80
Efficiency (%)
Efficiency (%)
AUX1 Efficiency vs. PWM Duty Cycle
(4 WLEDs; L = 4.7μH; COUT = 1μF; 10kHz PWM Control)
60
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
50
40
30
20
10
75
70
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
65
60
55
50
45
40
0
0
2
4
6
8
10
12
14
16
18
1
20
10
LED Current (mA)
100
Output Current (mA)
AUX3 Efficiency vs. Output Current
AUX1 PWM Duty Cycle vs. LED Current
(VAUX3 = -7.5V; L = 4.7μH; COUT = 4.7μF)
(4 WLEDs; L = 4.7μH; COUT = 1μF; 10kHz PWM Control)
80
20
LED Current (mA)
75
Efficiency (%)
70
65
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
60
55
50
45
40
16
12
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
8
4
0
1
10
100
0
10
20
30
Load Current (mA)
SU Load Regulation vs. Output Current
70
80
90
100
(VPVM = VBAT; VMSD = 3.3V; L = 3.3μH; COUT = 4.7μF)
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
0.04
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
Bypass mode
200
400
600
800
1000
1200
1400
1600
Load Regulation (%)
Load Regulation (%)
60
0.05
0.03
0.02
0.01
0.00
-0.01
-0.02
-0.03
-0.04
-0.05
0
Load Current (mA)
12
50
Main SD Load Regulation vs. Output Current
(VSU = 5V; L = 2.2μH; COUT = 22μF)
0.020
0.015
0.010
0.005
0.000
-0.005
-0.010
-0.015
-0.020
-0.025
-0.030
-0.035
-0.040
-0.045
-0.050
0
40
Duty Cycle (%)
Dropout Mode
50
100
150
200
250
300
350
400
Load Current (mA)
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
SD1 Load Regulation vs. Output Current
(VMSU = 3.3V; L = 2.2μH; COUT = 10μF)
(VPVSD1 = VBAT; VSD1 = 2.5V: L = 2.2μH; COUT = 10μF)
0.05
0.010
0.04
0.008
Load Regulation (%)
Load Regulation (%)
Main SU Load Regulation vs. Output Current
0.03
0.02
0.01
0.00
-0.01
-0.02
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
-0.03
-0.04
50
100
150
200
250
300
350
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
-0.05
0
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
0.006
400
0
50
100
Load Current (mA)
SD2 Load Regulation vs. Output Current
250
300
350
400
(VSD2 = 1.2V: L = 2.2μH; COUT = 4.7μF)
0.010
0.010
VBAT = 2.4V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
0.006
0.004
0.002
VBAT = 2.4V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
0.008
Load Regulation (%)
0.008
Load Regulation (%)
200
SD2 Load Regulation vs. Output Current
(VPVSD2 = VBAT; VSD2 = 1.8V: L = 2.2μH; COUT = 4.7μF)
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
0
50
100
150
200
250
300
350
400
0
50
Load Current (mA)
100
150
200
250
300
350
400
Load Current (mA)
AUX2 Load Regulation vs. Output Current
AUX3 Load Regulation vs. Output Current
(VAUX2 = +15V; L = 4.7μH; COUT = 4.7μF)
(VAUX3 = -7.5V; L = 4.7μH; COUT = 4.7μF)
0.010
3.0
0.006
0.004
0.002
0.000
Load Regulation (%)
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
0.008
Load Regulation (%)
150
Load Current (mA)
-0.002
-0.004
-0.006
-0.008
-0.010
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
2.0
1.0
0.0
-1.0
-2.0
-3.0
0
10
20
30
40
50
60
70
80
90
100
Load Current (mA)
2610.2008.11.1.1
0
10
100
Load Current (mA)
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13
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
LXSU
(5V/div)
SU Output Ripple
SU Output Ripple
(VBAT = 3.6V; VSU = 5V; COUT = 22μF; 10mA Load)
(VBAT = 3.6V; VSU = 5V; L = 2.2μH;
COUT = 22μF; 200mA Load)
LXSU
(5V/div) 0
0
IINDUCTOR
(500mA/div)
0
VSU (AC)
(50mV/div)
0
IINDUCTOR
(200mA/div)
0
VSU (AC) 0
(10mV/div)
Time (10μs/div)
Time (400ns/div)
Main SU Output Ripple
Main SU Output Ripple
(VBAT = 2.4V; VMSU = 3.3V; L = 2.2μH;
COUT = 10μF; 10mA Load)
(VBAT = 2.4V; VMSU = 3.3V; L = 2.2μH;
COUT = 10μF; 200mA Load)
LXM
(2V/div)
LXM
(5V/div)
0
IINDUCTOR
(200mA/div)
0
IINDUCTOR
(500mA/div)
0
0
VMSU (AC)
(20mV/div)
VMSU
(20mV/div)
0
0
Time (4μs/div)
Time (400ns/div)
Main SD Output Ripple
Main SD Output Ripple
(VPVM = VBAT = 4.2V; VMSD = 3.3V; L = 3.3μH;
COUT = 4.7μF; 10mA Load)
(VPVM = VBAT = 4.2V; VMSD = 3.3V; L = 3.3μH;
COUT = 4.7μF; 200mA Load)
LXM
(2V/div)
LXM
(2V/div)
0
0
IINDUCTOR
(200mA/div)
IINDUCTOR
(200mA/div) 0
VMSD (AC)
(20mV/div)
VMSD (AC)
(10mV/div)
0
Time (4μs/div)
14
0
0
Time (4μs/div)
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
SD Output Ripple
SD Output Ripple
(VPSD2 = VBAT = 3.6V; VSD2 = 1.8V; L = 2.2μH;
COUT = 4.7μF; 10mA Load)
(VPVSD2 = VBAT = 3.6V; VSD2 = 1.8V; L = 2.2μH;
COUT = 4.7μF; 200mA Load)
LX
(2V/div)
LXSD2
(2V/div)
0
0
IINDUCTOR
(200mA/div)
0
IINDUCTOR
(200mA/div)
0
VSD2 (AC)
(20mV/div)
VSD2 (AC)
(20mV/div)
0
0
Time (2μs/div)
LXL1
(10V/div)
Time (800ns/div)
AUX1 Output Ripple
AUX2 Output Ripple
(VBAT = 3.6V; COUT = 1μF; L = 4.7μH;
4 WLED with 20mA Load)
(VBAT = 3.6V; VAUX2 = 15V; COUT = 4.7μF/25V;
L = 4.7μH; 20mA Load)
LXL2
(10V/div)
0
IINDUCTOR
(200mA/div)
0
IINDUCTOR
(200mA/div)
0
0
VAUX1 (AC)
(100mV/div)
VAUX2 (AC)
(20mV/div)
0
0
Time (400ns/div)
LXL3
(10V/div)
Time (400ns/div)
AUX3 Output Ripple
SU Channel Load Transient Response
(VBAT = 3.6V; VAUX3 = -7.5V; COUT = 4.7μF/10V;
L = 4.7μH; 20mA Load)
(VBAT = 3.6V; VSU = 5V; L = 2.2μH; COUT = 22μF;
Transient Slew Rate 0.1A/μs)
0
VSU (AC)
(200mV/div)
IINDUCTOR
(100mA/div)
500mA
0
IOUT
(200mA/div)
VAUX3 (AC)
(10mV/div)
200mA
0
Time (40μs/div)
Time (400ns/div)
2610.2008.11.1.1
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15
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
Main SD Load Transient Response
SD1 Load Transient Response
(VBAT = VPVM = 3.6V; VMSD = 3.3V; L = 3.3μH;
COUT = 4.7μF; Transient Slew Rate = 0.1A/μs)
(VBAT = VPVSD1 = 3.6V; VSD1 = 2.5V; L = 2.2μH;
COUT = 10μF; Transient Slew Rate = 0.1A/μs)
VMSD
(50mV/div)
VMSD
(50mV/div)
200mA
IOUT
(100mA/div)
200mA
IOUT
(100mA/div)
100mA
100mA
Time (40μs/div)
Time (40μs/div)
SD2 Load Transient Response
AUX2 Load Transient Response
(VBAT = VPVSD2 = 3.6V; VSD2 = 1.8V; L = 2.2μH;
COUT = 4.7μF; Transient Slew Rate = 0.1A/μs)
(VBAT = 3.6V; VAUX2 = 15V; L = 4.7μH;
COUT = 4.7μF/25V; Transient Slew Rate = 0.1A/μs)
VSD2
(50mV/div)
VAUX2
(200mV/div)
20mA
200mA
IOUT
(100mA/div)
IOUT
(10mA/div)
100mA
1mA
Time (40μs/div)
Time (40μs/div)
AUX3 Load Transient Response
Mininum Start-up Voltage vs. Load Current
(VBAT = VPVL3 = 3.6V; VAUX3 = -7.5V; L = 4.7μH;
COUT = 4.7μF/10V; Transient Slew Rate = 0.1A/μs)
20mA
IOUT
(10mA/div)
1mA
SU Load Current (mA)
VAUX3
(200mV/div)
(VSU = 5V)
2000
1800
1600
1400
1200
1000
800
600
400
1.8
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
Battery Voltage (V)
Time (40μs/div)
16
2.0
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
EN
(5V/div)
IIN
(2A/div)
VSU
(5V/div)
LXSU
(5V/div)
SU Start-up
Line Transient Response
(VBAT = 3.6V; VSU = 5V; COUT = 22μF; 1A Load)
(VBAT = 3.6V to 4.2V; VSU = 5V; L = 2.2μH;
COUT = 22μF; 200mA Load)
VBAT
(2V/div)
0
0
0
0
VSU 0
(100mV/div)
0
Time (200μs/div)
Time (1ms/div)
SU Start-up Sequence
AUX1, AUX2, AUX3 Start-up Sequence
(VBAT = 3.6V; All Seven Channels Enabled;
VSU = 5V; SU = 10mA Load)
(VBAT = 3.6V; AUX1 = 4 WLEDs; VSU = 5V; VAUX2 = 15V;
VAUX3 = -7.5V; AUX2, AUX3 = 10mA Load)
LX
(5V/div)
0
EN
(5V/div)
VAUX1
(5V/div)
VSU
(5V/div)
0
VAUX2
(5V/div)
EN
0
(5V/div)
IIN
(1A/div)
0
0
0
0
VAUX3
(5V/div)
0
Time (200μs/div)
Time (400μs/div)
MSD, SD1, SD2 Startup Sequence
MSU, SD1, SD2 Startup Sequence
(VBAT = 3.6V; VSU = 5V; VMSD = 3.3V;
VSD2 = 1.8V; 10mA Load)
(VBAT = 1.8V; VSU = 5V; VMSU = 3.3V; VSD1 = 2.5V;
PVSD1 = PVSD2 = PVSU; 10mA Load)
EN
(5V/div)
0
EN
(2V/div)
0
VSD1
(2V/div)
0
VMSU
(2V/div)
0
VMSD
(2V/div)
VSD2
(2V/div)
VSD1
(2V/div)
VSD2
(2V/div)
0
0
Time (400μs/div)
2610.2008.11.1.1
0
0
Time (400μs/div)
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17
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Typical Characteristics
Switching Frequency vs. Temperature
0.604
1.70
0.603
1.66
Frequency (MHz)
Reference Voltage (V)
Reference Voltage vs. Temperature
0.602
0.601
0.600
0.599
0.598
-40°C
25°C
85°C
0.597
0.596
1.8
2.2
2.6
3.0
3.4
3.8
4.2
4.6
1.62
1.58
1.54
1.50
1.46
1.42
1.38
1.34
1.30
-40
5.0
-20
0
Temperature (°C)
20
40
60
80
Temperature (°C)
Shutdown Current vs. Input Voltage
Input Current vs. Input Voltage
0.20
1.6
0.18
1.4
Input Current (mA)
Shutdown Current (uA)
(Only SU Enabled, VSU = 5V, L = 2.2μH, COUT = 22μF)
0.16
0.14
0.12
0.10
-40°C
25°C
85°C
0.08
0.06
0.04
1.2
1.0
0.8
0.6
0.4
0.2
0.02
0.00
1.8
2.2
2.6
3.0
3.4
3.8
4.2
4.6
5.0
5.4
0.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Battery Voltage (V)
Input Voltage (V)
18
-40°C
25°C
85°C
www.analogictech.com
2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Functional Block Diagram
ENL1
ENSU ENM ENSD1 ENSD2 (Dimming) ENL2 ENL3
I/O, Control
SUSD
VIN
PV
PVSU
SCF
StepUp/
Bypass
Control
OT
Osc
(1.5MHz)
LXSU
FBSU
PVL
PVM
Step-Up
Control
&
Current
Sink
LXL1
StepUp/
Down
Control
LXM
CSL1
FBM
OVL1
SEQ
PVSD1
Step-Up
Control
LXL2
StepDown
Control
LXSD1
FBSD1
FBL2
PVSD2
Step-Up
Control
PVL3
StepDown
Control
LXSD2
LXL3
FBSD2
FBL3
VREF3
PGSU
2610.2008.11.1.1
PGM
PGSD1
PGSD2
PGL
www.analogictech.com
GND
19
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Functional Description
Start-Up
The AAT2610 PMIC is targeted for single cell Li-ion battery or dual cell Alkaline battery applications. It includes
seven integrated step-up and step-down converters,
including one synchronous step-up converter (SU), two
synchronous step-down converters (SD1, SD2), one
synchronous step-up or step-down converter (Main), two
non-synchronous step-up converters (AUX1, AUX2) and
one non-synchronous buck-boost (inverting) converter
(AUX3).
The SU converter is the key channel. Its output powers
all internal control and reference circuits when the output voltage is above 2.7V. The AUX1 converter is specially designed for 1 to 6 white LED serial backlight
applications. Its current sink pin (CSL1) is suitable to
control WLED current to up to 20mA. AUX3 is a transformerless inverting converter which controls the internal
P-channel MOSFET to regulate negative voltage.
The AAT2610 uses a fixed-frequency peak current control
architecture. Light load mode is used to enhance light
load efficiency. Compensation is integrated to reduce the
number of external components and achieve excellent
transient response and load and line regulation.
The ideal 1.5MHz switching frequency allows the use of
smaller output filter components for improved power
density, reduced external component size, and optimized
output voltage ripple. The output voltages can be programmed by an external divider.
The AAT2610 has seven separate enable pins to control
each converter's startup. A 1.4ms startup delay is
employed to guarantee that the key SU converter is
already in regulation and the internal control and the
reference have been normally biased before the other six
converters start up.
Synchronous Step-Up DC to DC Converter
The AAT2610 has one synchronous step-up DC-DC converter. It utilizes internal power MOSFETs to achieve high
efficiency over the full load current range. The external
feedback can program the output voltage between 3.0V
to 5.5V. Its “bypass” mode automatically connects the
input to the output when the input voltage is higher than
the bypass mode threshold. In shutdown, the enable pin
(ENSU) is pulled low, the SU converter output is equal to
the input voltage minus a voltage drop across the parasitical body diode, and all other channels are shut down
regardless of their enable setting.
20
The AAT2610's major control circuitries adopt power
from the SU converter output and do not function at less
than 2.7V. To ensure the PMIC can start up at VIN as low
as 1.8V, the step-up converter employs a startup oscillator with a typical 200kHz frequency. The startup oscillator drives the internal N-channel MOSFET at LXSU until
the SU converter output voltage reaches 2.7V, at which
point the current-mode PWM circuitry takes over. A
startup current limit (750mA) and NMOSFET off time
(700ns) decrease the startup inrush current. At low input
voltages, the AAT2610 may have difficulty starting up
with heavy loads.
Under-Voltage Lockout
Independent UVLO (Under-Voltage Lockout) circuitry
guarantees the sufficient input power and proper operation of all internal circuitry. When input voltage at VIN
rises above 1.8V, the AAT2610 leaves UVLO status and
enters the startup process. Once in regulation, the VIN
power can be as low as 1.6V before the AAT2610 enters
UVLO status.
Bypass Mode
When the SU converter input voltage increases above the
bypass mode threshold (typically 4.75V), the step-up
converter enters “bypass” mode, which automatically
connects the input to the output. In this mode, P-channel
synchronous MOSFET is always ON and N-channel
MOSFET is always off. The output voltage follows input
voltage in the mode and overload protection is disabled.
Synchronous Step-Up /
Step-Down DC to DC Converter
The AAT2610 has one synchronous step-up/step-down
DC-DC converter which is ideally designed for 2AA/Li-ion
applications. The SUSD pin is used to set the operation
mode. When SUSD is set to logic high, the step-up converter setting is selected. N-channel switch transistor
current is sensed for current loop control to regulate the
output over the complete load range; when SUSD is
pulled low, the step-down converter type is set and the
P-channel switch transistor current is sampled for the
current control loop. In both converter types, soft-start
is employed to suppress the startup inrush current and
eliminate the output voltage overshoot.
In shutdown with the enable pin (ENM) pulled low, if the
step-down converter is selected, the converter is forced
into a non-switching state and the output voltage drops
to zero. When the step-up converter is selected, the output voltage is equal to the input voltage minus a voltage
www.analogictech.com
2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
drop across the parasitical body diode. If true load disconnection is required, an external PMOSFET controlled
by SEQ can be adopted.
Synchronous Step-Down
DC to DC Converter
The AAT2610 has two synchronous step-down DC-DC
converters. Their output voltages can be programmed
from 0.6V to VIN by an external resistor divider.
At dropout, the converter’s duty cycle equals 100% and
the output voltage tracks the input voltage minus the
voltage drop across the P-channel MOSFET. At low input
supply voltage, the RDS(ON) of the P-channel MOSFET
increases, and the efficiency of the converter decreases.
The two step-down converters adopt soft-start to eliminate output voltage overshoot when the enable or input
voltage is applied. When the ENSD1 and ENSD2 are
pulled low, the outputs of the two SD converters are
down to zero and its shutdown current is below 1μA.
Non-Synchronous Step-Up and Buck/
Boost (Inverting) DC to DC Converters
Two non-synchronous step-up converters are targeted
for LCD backlight and CCD positive loads. The controllers
regulate the output voltage by modulating the pulse
width of the internal NMOSFET. External schottky diode
and power inductor are required to set up the boost. The
output voltage can be programmed from 5V to 20V by
external divider.
Auxiliary 1 is ideally designed for driving typical 4 serial
white LEDs. The maximum current flowing through the
WLED string is sensed at CSL1 and set to 20mA by the
internal ballast resistor with ±10% accuracy. The industry
standard PWM (Pulse Width Modulation) controlling technology is adopted to program the WLED current. Applying
a 10% ~100% duty cycle PWM signal with the frequency
range 1kHz to 30kHz at ENL1 can get 2mA to 20mA
WLED current. If an open circuit occurs, the internal
over-voltage protection circuit prevents damage to the
converter within 67ms, then shuts down all channels.
Auxiliary 2 is designed for +15V CCD bias. Soft-start is
adopted to eliminate the output voltage overshoot and
decrease the effect on the input voltage.
Auxiliary 3 is non-synchronous buck-boost (inverting)
DC to DC converter which is targeted for negative CCD
loads with low noise. Soft-start is adopted to limit the
inrush current at startup.
2610.2008.11.1.1
Light Load Mode and
Normal PWM Control
The AAT2610 uses light load mode to enhance the efficiency at light load. In light load mode, if the error
amplifier output signal is lower than a given level at a
certain clock point, the switch pulse is skipped to reduce
dominant switching losses.
In normal PWM mode to the buck converter, the current
through the P-channel (high side) is sensed for current
loop control. The P-channel current limit is used to prevent internal power PMOSFET overstress or damage by
the high power. To the boost converter, the current though
the N-channel (low side) is sensed for the control loop and
its current limit also protects the main MOSFET.
The 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. The internal fixed slope compensation is employed to eliminate
the sub-harmonic oscillation and keep regulation stable
when the duty cycle is over 50%.
Fault Protection
Short-Circuit and Overload Protection
When any of the converters’ output voltage is lower than
the programmed value for a certain period of time
(100,000 clock cycles, typically 66.7ms), the central
control circuits treat it as an overload situation; all seven
channels will be turned off and SCF will be pulled low
until the IC is restarted either by SU enable pin (ENSU)
reset or re-application of the input voltage. During overload period, the peak current limit prevents the main
switch (NMOSFET of step-up converter and PMOSFET of
step-down converter) from overstress and damage, and
also avoids saturation of the external inductor. For synchronous step-up (SU) channels, overload protection
function is disabled in “bypass” mode.
Over-Temperature Protection
Thermal protection completely disables power MOSFET
switching when internal power dissipation becomes
excessive. Only reference and internal clock are still
active in this condition. Once the over-temperature condition is removed, the output voltages automatically
recover. The junction over-temperature threshold is
140°C with 15°C of hysteresis.
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21
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Application Information
Table 1 shows the resistor selection for different output
voltage settings. 1% accuracy metal-film resistors are
strongly recommended to get accurate output voltages.
Setting the Output Voltage
Step-Down Converter
An external resistor divider is used to program the stepdown converter's output voltage from 0.6V to VIN.
Resistors R1 and R2 in Figure 1 program the output to
regulate at voltages higher than 0.6V. To limit the bias
current required for the external feedback resistor string
while maintaining good noise immunity, the suggested
value for R2 is 59kΩ. 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 1 summarizes the
resistor values for various output voltages with R2 set to
59kΩ.
VOUT (V)
R2 = 59kΩ
R1 (kΩ)
1.2
1.5
1.8
2.5
3.0
3.3
59
88.7
118
187
237
267
Table 1: Resistor Select for Step-Down Converter
Output Voltage Setting.
Step-Up Converter
Similar to the step-down converter, the step-up regulators also use an external resistor divider to program the
output voltage. The AAT2610 has 4 step-up converters:
SU, Main SU, AUX1 and AUX2. The equation for external
resistors setting the output voltage is same as for the
step-down converter. Figure 2 shows the synchronous
(SU and Main SU) and non-synchronous (AUX1 and
AUX2) step-up converter application connections. Table
2 shows resistor selection for different output voltage
settings. 1% accuracy metal-film resistors are strongly
recommended to get accurate output voltages.
The AAT2610 has 3 step-down converters: SD1, SD2
and Main SD. The external resistor sets the output voltage according to the following equations:
R1
VOUT = 0.6V · 1 + R2
VOUT
R1 = 0.6V -1 · R2
AAT2610
Step-Down Converter
VOUT
2.5V
L1
LX
VIN
PV
C1
FB
PG
R1
187kΩ
C2
R2
59kΩ
Figure 1: Step-Down Converter with Output Voltage Programmed by External Resistor Divider.
22
www.analogictech.com
2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
AAT2610
Synchronous Step-Up Converter
VIN
VIN
C1
L1
R1
432 kΩ
FB
VOUT
15V
D1
LX
LX
C1
VOUT
5V
PV
L1
AAT2610
Non-Synchronous
Step-Up Converter
C2
R1
1.43MΩ
FB
R2
59kΩ
PG
C2
R2
59kΩ
PG
(a) Synchronous step-up converter
(b) Non-synchronous step-up converter
Figure 2: Step-Up Converter with Output Voltage Programmed by External Resistor Divider.
VOUT (V)
R2 = 59kΩ
R1 (kΩ)
3.3
3.8
4.2
5.0
15
267
316
357
432
1420
AAT2610
Inverting converter
VIN
PVL3
L1
C1
LXL3
Table 2: Resistor Select for Step-up Converter
Output Voltage Setting.
FBL3
VOUT
-7.5V
D1
R1
732kΩ
C2
R2
59kΩ
REF
Buck-Boost (Inverting) Converter
C3
The AAT2610 has one inverting converter, AUX3. Figure
3 shows an AUX3 application circuit. Its programmed
output voltage can be set by the following equations:
-0.6V
VOUT = R2 · R1
Figure 3: Buck/Boost (Inverting) Converter with
Output Voltage Programmed by External Resistor
Divider.
Inductor Selection
VOUT
R1 = -0.6V · R2
2610.2008.11.1.1
The AAT2610 can utilize small surface mount inductors
due to its fast 1.5MHz switching frequency. Optimized
inductor values for each channel keeps the seven channels stable, and achieves reduced output voltage ripple
at smaller output capacitor size. See Table 3 for recommended inductors for each channel. A greater inductance
value will allow greater output current capability by
reducing inductor ripple current. Increasing the inductance above 4.7μH will increase size to get enough saturation current rating. The following equations show the
minimum saturation current of the selected inductors.
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23
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Manufacturer
Part Number
Inductance
(μH)
Max DC
Current
(A)
DCR
(mΩ)
Size (mm)
LxWxH
Type
2.2
2.5
2.5
2.2
1.8
3.3
4.7
4.7
2.2
4.7
2.2
3.3
4.7
2.2
3.3
4.7
3.2
4.5
0.53
0.60
0.65
0.50
1.0
0.75
1.6
1.2
1.0
0.81
0.80
1.6
1.2
1.0
35.4
12
120
115
105
139
135
190
48
110
149
195
246
76
120
180
4.5x4.5x2.4
8.3x8.3x3
3.2x3.2x1.0
3.2x3.2x1.0
3.2x3.2x1.0
3.2x3.2x1.0
3.2x3.2x1.55
3.2x3.2x1.2
3.2x3.2x2.0
3.2x3.2x2.0
3.1x3.1x1.0
3.1x3.1x1.0
3.1x3.1x1.2
3.2x2.5x1.55
3.2x2.5x1.55
3.2x2.5x1.55
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
shielded
unshielded
unshielded
unshielded
CDRH4D22/HP
CDRH8D28
CDRH2D09
Sumida
Cooper
Murata
CDRH2D09C
CDRH2D14
CDRH2D11/HP
CDRH2D18/HP
CDRH2D18/HP
SD3110
SD3110
SD3112
LQH32PN2R2NN0
LQH32PN3R3NN0
LQH32PN4R7NN0
Suit for
Channel
SU
SU
Main SD, SD1, SD2
Main SD, SD1, SD2
SD2
Main SU
AUX1, AUX2, AUX3
Main SD, SD1, SD2
AUX1, AUX2, AUX3
Main SD, SD1, SD2
Main SU, SD1, SD2
AUX1, AUX2, AUX3
Main SD, SD1, SD2
Main SU, SD1, SD2
AUX1, AUX2, AUX3
Table 3: Suggested Inductor Selection Information.
selected output capacitors, not only calculating the output capacitor minimum values are necessary according
to the equations, but the actual capacitance must be
carefully considered to get expected output voltage ripple. X5R and X7R dielectric materials of ceramic capacitors are preferred for their ability to maintain capacitance over wide voltage and temperature ranges.
To step-up converter,
IL_SAT >
VIN · D
IOUT_MAX
+
1-D
2·f·L
Among it,
VIN
D=1- V
OUT
To step-up converter,
To step-down converter,
IL_SAT > IOUT_MAX +
COUT ≥
(VIN - VOUT) · D
2·f·L
To step-down converter,
Among it,
COUT ≥
VOUT
D= V
IN
Input and Output Capacitor Selection
Low ESR (equivalent series resistance) capacitors should
be used to minimize output voltage ripple. Multilayer
ceramic capacitors are an excellent choice as they have
extremely low ESR and are available in small footprints.
The following equations show the minimum capacitance
under the required output voltage ripple for step-up and
step-down converters. In actual application, capacitance
usually decreases a lot as its DC bias increases. So when
24
D · IOUT
ΔVOUT · f
VOUT
· (1 - D)
8 · f2 · L · ΔVOUT
For example, to step-up converter, when VIN = 3.6V, IOUT
= 900mA, and f = 1.5MHz, output ripple requires below
30mV. According to the equation above, the calculated
COUT should be higher than 5.6μF. If use Sumida 22μF/6.3V
0805 ceramic capacitor, its capacitance at 5V DC bias is
8.0μF which can meet the ripple requirements.
Input capacitors for input decoupling should be located
as close as possible to the device to get better input
power filtering effect. Select 1μF to 4.7μF X5R or X7R
ceramic capacitors for the inputs. Table 4 shows suggested capacitor part numbers.
www.analogictech.com
2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Output Diode
A Schottky diode is suitable in the three non-synchronous
step-up channels for its low forward voltage and fast
recovery time. 20V rated Schottky diodes are recommended for outputs less than 10V, while 30V rated
Schottky diodes are recommended for outputs greater
than 10V. Table 5 shows suggested diode part numbers.
Using SEQ for Power Sequence
Power sequence delay is designed to connect the loads
to Main channel output after its normal startup. Use the
SEQ output signal to control an external PMOSFET connected between Main output and loads. The SEQ output
is high impedance lasted for 10ms when startup, then
pulled low after both the SD1 and SD2 converters completed soft-start and achieved output regulation. When
SD1 and SD2 are disabled, SEQ is also pulled low after
10ms when Main channel achieves regulation.
The power dissipation for the synchronous buck channel
in CCM (Continuous Conduction Mode) can be calculated
by the following equation:
VINBUCK
VINBUCK
PSyn-BUCK = IOUTBUCK2 · RDS(ON)P · V
+ RDS(ON)N · 1 - V
OUTBUCK
OUTBUCK
Where:
PSyn-BUCK = Synchronous Buck Channel Power Dissipation
IOUTBUCK = Synchronous Buck Channel Output Current
VOUTBUCK = Synchronous Buck Channel Output Voltage
VINBUCK = Synchronous Buck Channel Input Voltage
RDS(ON)x = Synchronous Buck Channel PMOS or NMOS
Drain-Source On Resistance
The power dissipation for the synchronous boost channel
in CCM can be calculated by the following equation:
VINBOOST
VINBOOST
PSyn-BOOST = IINBOOST2 · RDS(ON)P · V
+ RDS(ON)N · 1 - V
OUTBOOST
OUTBOOST
Using SCF for Full-Load Startup
Where:
SCF goes high (high impedance, open drain) when overload protection occurs. Under normal operation, SCF
pulls low. It can be used to drive a P-channel MOSFET
switch that turns off the load of a selected supply in the
event of an overload. Or, it can remove the load until the
supply reaches regulation, effectively allowing full load
startup.
PSyn-BOOST = Synchronous Boost Channel Power
Dissipation
IINBOOST = Synchronous Boost Channel Input Current
VOUTBOOST = Synchronous Boost Channel Output Voltage
VINBOOST = Synchronous Boost Channel Input Voltage
RDS(ON)x = Synchronous Boost Channel PMOS or NMOS
Drain-Source On Resistance
Thermal Considerations
The power dissipation for the non-synchronous boost
channel can be calculated by the following equation:
Thermal design is an important aspect of power management IC applications and PCB layout. The AAT2610
TQFN55-40L package can provide up to 2W of power dissipation when it is properly soldered onto a printed circuit
board with thermal vias. The package has a maximum
thermal resistance of 25°C/W. The maximum power dissipation in a given ambient condition can be calculated:
PD(MAX) =
(TJ(MAX) - TA)
θJA
Where:
PD(MAX) = Maximum Power Dissipation (W)
θJA = Package Thermal Resistance (°C/W)
TJ(MAX) = Maximum Device Junction Temperature (°C)
[150°C]
TA = Ambient Temperature (°C)
2610.2008.11.1.1
VINBOOST
PNonsyn-BOOST = IINBOOST2 · RDS(ON)N · 1 - V
OUTBOOST
Where:
PNonsyn-BOOST = Non-Synchronous Boost Channel Power
Dissipation
IINBOOST = Non-Synchronous Boost Channel Input
Current
VOUTBOOST = Non-Synchronous Boost Channel Output
Voltage
VINBOOST = Non-Synchronous Boost Channel Input
Voltage
RDS(ON)N = Non-Synchronous Boost Channel internal
NMOS Drain-Source On Resistance
www.analogictech.com
25
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
The power dissipation for the inverting channel in CCM
can be calculated by the following equation:
VOUT-BUCKBOOST
PNonsyn-BUCKBOOST = IIN-BUCKBOOST2 · RDS(ON)P · V
IN-BUCKBOOST - VOUT-BUCKBOOST
3.
Where:
PNonsyn-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Power Dissipation
IIN-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Input Current
VOUT-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Output Voltage
VIN-BUCKBOOST = Non-Synchronous Buck/Boost Channel
Input Voltage
RDS(ON)P = Non-Synchronous Buck/Boost Channel internal PMOS Drain-Source On Resistance
4.
5.
6.
Layout Guidance
When laying out the PC board, the following layout
guideline should be followed to ensure proper operation
of the AAT2610:
1.
2.
26
The exposed pad (EP) must be reliably soldered to
the GND plane for better power dissipation. A PGND
pad below EP is required.
The power traces, including the GND trace, the LX
trace and the IN trace should be kept short, direct
and wide to allow large current flow. Each inductor
of the seven channels should be connected to the LX
7.
pins as short as possible. Use several VIA pads when
routing between layers to decrease the conduction
resistance.
The input filter capacitor of each channel should connect as closely as possible to IN (Pins 3, 8, 15, 29,
33 and 35) and GND (Pins 5, 6, 26, 27 and 37) to
get good power filtering.
Keep the switching node, LX (Pins 4, 7, 25, 29, 34,
36 and 38), away from the sensitive FB node.
The feedback trace should be separate from any
power trace and connect as closely as possible to the
load point. Sensing along a high-current load trace
will degrade DC load regulation. The external feedback resistors should be placed as closely as possible
to the FB pin (Pin 1, 2, 9, 23, 30, 32 and 40) to
minimize the length of the high impedance feedback
trace.
It is recommended to connect the external feedback
resistor divider to the signal ground (Pin 16). The
signal ground and power ground should be connected at a single point to alleviate the power
ground noise affecting the feedback voltage.
The resistance of the trace from the load return to
PGND 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.
Figure 4 and 5 show the AAT2610 evaluation board layout with 4 layers.
www.analogictech.com
2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Manufacturer
Channel / Capacitor
Position
Value (μF)
Voltage (V)
Case Size
Part Number
1
25
0603
GRM188R61E105K
1
10
0603
GRM185R61A105K
3.3
4.7
10
25
0603
0805
GRM188R61A335K
GRM21BR61E475K
4.7
6.3
0603
GRM188R60J475K
10
22
6.3
6.3
0805
0805
GRM219R60J106KE19
GRM21BR60J226M
Murata
AUX1 / output
SD1, SD2, AUX1, AUX2,
AUX3 / input
AUX3 / output
AUX2 / output
SU, Main / input
Main SD, SD1, SD2 / output
Main SU, SD1, SD2
SU, Main SU / output
Table 4: Suggested Input and Output Capacitor Selection Information.
Manufacturer
Part Number
Rated
Forward
Current (A)
NonRepetitive
Peak Surge
Current (A)
Rated
Voltage (V)
Thermal
Resistance
(RθJA, °C/W)
Package
MBR0530T
MBR0520LT
BAT42W
ZHCS350
CMDSH2-3
0.5
0.5
0.2
0.35
0.2
5.5
5.5
4
4.2
1.0
30
20
30
40
30
206
206
500
330
500
SOD-123
SOD-123
SOD-123
SOD-523
SOD-323
ON Semi
Diodes
Zetex
Central Semi
Table 5: Suggested Schottky Diode Selection Information.
D5
MBR0530
OVL1=(1+R501/R502)*0.6
AUX1
VAUX1
R503 C502
0 1uF/25V
PVSU R505 0
VBAT
R506 0
R501
1.54M
R502
59k
D501
L5
4.7uH
C501
4.7uF
PVSU 35
LXL1 38
CSL1 39
40
OVL1
D502
VAUX2
+15V C602A
D503
10uF/16V
D6
C602B
R601
10uF/16V 1.42M
D504
R602
59k
PVSU R603 0
VBAT
C603
R604 0
56pF for Li-ion
/6.8pF for 2AA
SCF
U1
AAT2610
C503
4.7uF
PVL
LXL1
CSL1
OVL1
SCF
VIN
LXSU
PV
PVSU
FBSU
MBR0530
L6
4.7uH
36
1
C601
4.7uF
VBAT
22
C102
1uF
15
25
17
24
23
L1
2.2uH
VBAT
C
10uF
R104
LXSU
PVSU
C104
27pF
C103A
22uF
R101
432k
R102
59k
VSU=(1+R101/R102)*0.6
LXL2
FBL2
C101
4.7uF
C103B
22uF
VSU
+5V
SCF
Main Channel Step-up: place C204, L2SU, R2U1, C201AB, R2U2, R2U3
Main Channel Step-down: place R2D1, C201A, L2SD, C202, R2D2
L2SU
D505
D506
2
1
VAUX3=-0.6*(R701/R702)
VAUX3
-7.5V
C704
3.9pF for Li-ion
/1.5pF for 2AA
R504
0
WLED-
D7
MBR0530
AUX3
R701 C702A
732k 10uF/16V
VBAT
PVSU
R507
CSL1
C702B
10uF/16V
R703 0
C701 R704 0 PVL3
4.7uF
33
34
32
FBL3
VREF3 31
L7
4.7uH
PVSU
21
20
19
18
14
13
12
11
JENSD1
JENSD2
R702
59k
JENL1
VREF3
JENL2
C703
1uF
R2U1
0
PVL3
LXL3
FBL3
VREF3
LXM
PVM
FBM
SEQ
7
8
9
10
C201A
22uF for
MSU /4.7uF
for MSD
JENSU
JENM
FBL3
VBAT
2.2uH
VAUX2=1+R601/R602)*0.6
ENSU
ENM
ENSD1
ENSD2
ENL1
ENL2
ENL3
SUSD
JENL3
PVSU
R2U3
0
/SEQ
C301
4.7uF
PVSD1
LXSD1
FBSD1
PGND
SGND
PGSU
PGM
PGSD1
PGSD2
PGL
GND
EP
L3
2.2uH
VM
C202
22uF
R201
267k
VM
+3.3V
C203
56pF for MSD/82pF for MSU
R202
59k
R303
0
VBAT
R304
PVSU
29
28
30
R301
187k
C302
10uF
R401
118k
GND
M2
0
L4
2.2uH
GND
M1
C402
4.7uF
R402
59k
SGND
VSD1
+2.5V
VSD1=(1+R301/R302)*0.6
R302
59k
R403
0
VBAT
R404
PVSU
C401
4.7uF
PVSD2
LXSD2
FBSD2
R2U2
0
C201B
22uF for
MSU only
VM=(1+R3/R4)*0.6
0
R2D2
0
26
6
5
27
37
16
41
L2SD
3.3uH
GND
3
4
2
SUSD=PVSU: Main channel is set to boost
SUSD=GND: Main channel is set to buck
R2D1 VBAT
0
C204
4.7uF
VSD2
+1.8V
M3
GND
GND
GND
M4
VSD2=(1+R401/R402)*0.6
GND
Figure 4: AAT2610 Evaluation Board Schematic.
2610.2008.11.1.1
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27
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
(a) Top Layer
(b) Internal GND Layer
(c) Internal Signal Layer
(d) Bottom Layer
Figure 5: AAT2610 Evaluation Board PCB Layout.
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Designation
Part Number
Description
Manufacturer
U1
AAT2610IIC
Seven-Channel High Efficiency Power
Management Unit
AnalogicTech
C
C101
C102, C703
C103A, C103B, C202
C104
C201A, C301, C401, C402,
C501, C503, C601, C701
C203, C603
C302
C303, C403
C502
C602A, C602B, C702A, C702B
C704
Inductor
L1
L2SD
L3, L4
L5, L6, L7
Resistor
R2D1, R2D2, R303 R403, R503,
R504, R506, R604, R703
R101
R102, R202, R302 R402, R502,
R602, R702
R201
R301
R401
R501
R601
R701
Other
D501, D502, D503, D504
T494B106M010AS
GRM21BR61C475K
GRM185R61A105K
GRM21BR60J226M
GRM1885C1H270J
CAP TAN 10μF B 10V 20%
CAP Ceramic 4.7μF 0805 X5R 16V 10%
CAP Ceramic 1μF 0603 X5R 10V 10%
CAP Ceramic 22μF 0805 X5R 6.3V 20%
CAP Ceramic 27pF 0603 C0G 50V 5%
GRM188R60J475K
CAP Ceramic 4.7μF 0603 X5R 6.3V 10%
GRM1885C1H560J
GRM188R60J106M
GRM1885C1H100J
GRM188R61E105K
GRM21BR61C106K
GRM1885C1H3R9D
CAP Ceramic 56pF 0603 C0G 50V 5%
CAP Ceramic 10μF 0603 X5R 6.3V 20%
CAP Ceramic 10pF 0603 C0G 50V 5%
CAP Ceramic 1μF 0603 X5R 25V 10%
CAP Ceramic 10μF 0805 X5R 16V 10%
CAP Ceramic 3.9pF 0603 C0G 50V ±0.5pF
CDRH4D22/HP-2R2NC
CDRH2D14-3R3NC
CDRH2D18/HPNP-2R2NC
CDRH2D14 NP-4R7NC
D5, D6, D7
IC Device
Capacitor
Power
Power
Power
Power
Inductor
Inductor
Inductor
Inductor
2.2μH
3.3μH
2.2μH
4.7μH
3.2A
1.2A
1.6A
1.0A
SMD
SMD
SMD
SMD
KEMET
Murata
Sumida
RC0603FR-070RL
RES 0Ω 1/10W 1% 0603 SMD
RC0603FR-07432KL
RES 432KΩ 1/10W 1% 0603 SMD
RC0603FR-0759KL
RES 59KΩ 1/10W 1% 0603 SMD
RC0603FR-07267KL
RC0603FR-07187KL
RC0603FR-07118KL
RC0603FR-071M54L
RC0402FR-071M42L
RC0603FR-07732KL
RES 267KΩ 1/10W 1% 0603 SMD
RES 187KΩ 1/10W 1% 0603 SMD
RES 118KΩ 1/10W 1% 0603 SMD
RES 1.54MΩ 1/10W 1% 0603 SMD
RES 1.42MΩ 1/16W 1% 0402 SMD
RES 732KΩ 1/10W 1% 0603 SMD
Yageo
RS-0805
20mA White LED 0805
MBR0530
Diode Schottky 0.5A 30V SOD-123
Realstar
International
Rectifier
Table 6: AAT2610 Li-ion Application Demo Board Bill of Materials (BOM).
2610.2008.11.1.1
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29
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Designation
Part Number
Description
Manufacturer
U1
AAT2610IIC
Seven-Channel High Efficiency Power
Management Unit
AnalogicTech
C
C101
C102, C703
C103A, C201A, C201B, C302
C203
C204, C301, C401, C402,
C501, C503, C601, C701
C303
C403
C502
C602A,C602B, C702A, C702B
C603
C704
Inductor
L1
L2SU, L3, L4
L5,
L6, L7
Resistor
R2U1, R2U2, R2U3 R303,
R404, R503, R504, R506,
R604, R704
R101
R102, R202, R301, R302,
R402, R502, R602
R201
R401
R501
R601
R701
R702
Other
D501, D502, D503, D504
T494B106M010AS
GRM21BR61C475K
GRM185R61A105K
GRM21BR60J226M
GRM1885C1H820J
CAP TAN 10μF B 10V 20%
CAP Ceramic 4.7μF 0805 X5R 16V 10%
CAP Ceramic 1μF 0603 X5R 10V 10%
CAP Ceramic 22μF 0805 X5R 6.3V 20%
CAP Ceramic 82pF 0603 C0G 50V 5%
GRM188R60J475K
CAP Ceramic 4.7μF 0603 X5R 6.3V 10%
GRM1885C1H150J
GRM1885C1H5R6D
GRM21BR61E475KA
GRM21BR61C106K
GRM1885C1H6R8D
GRM1885C1H1R5D
CAP Ceramic 15pF 0603 C0G 50V 5%
CAP Ceramic 5.6pF 0603 C0G 50V ±0.5pF
CAP Ceramic 4.7μF 0805 X5R 25V 10%
CAP Ceramic 10μF 0805 X5R 16V 10%
CAP Ceramic 6.8pF 0603 C0G 50V ±0.5pF
CAP Ceramic 1.5pF 0603 C0G 50V ±0.5pF
CDRH4D22/HP-2R2NC
CDRH2D18/HPNP-2R2NC
CDRH2D14 NP-4R7NC
CDRH2D18/HP-100
Power Inductor 2.2μH 3.2A SMD
Power Inductor 2.2μH 1.6A SMD
Power Inductor 4.7μH 1.0A SMD
Power Inductor 10μH 0.85A SMD
RC0603FR-070RL
RES 0Ω 1/10W 1% 0603 SMD
RC0603FR-07432KL
RES 432KΩ1/10W 1% 0603 SMD
RC0603FR-0759KL
RES 59KΩ1/10W 1% 0603 SMD
IC Device
Capacitor
D5, D6, D7
RC0603FR-07267KL
RC0603FR-07187KL
RC0603FR-071M54L
RC0603FR-071M2L
RC0603FR-07732KL
RC0603FR-0751KL
RES 267KΩ1/10W 1% 0603 SMD
RES 187KΩ 1/10W 1% 0603 SMD
RES 1.54MΩ 1/10W 1% 0603 SMD
RES 1.2MΩ 1/10W 1% 0603 SMD
RES 732KΩ 1/10W 1% 0603 SMD
RES 51KΩ 1/10W 1% 0603 SMD
RS-0805
20mA White LED 0805
MBR0530
Diode Schottky 0.5A 30V SOD-123
KEMET
Murata
Sumida
Yageo
Realstar
International
Rectifier
Table 7: AAT2610 2AA Application Demo Board Bill of Material (BOM).
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PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Additional Applications
The auxiliary AUX1 channel can drive higher current levels by adding an external resistor at the CSL1 pin. As an
example, a 220Ω is connected between CSL1 and GND to get a maximum 25mA led current as shown in Figure 6; a
73Ω is used to get maximum 35mA led current as shown in Figure 7.
VIN
L1
4.7μH
LXL1
OVL1
38
D1
C2
1μF
R1
1.54MΩ
40
D1
D2
R2
59kΩ
PGL
25mA
D3
37
D4
CSL1
ENL1
Load Current (mA)
AAT2610
AUX1 Channel
30
C1
1μF
R3
220Ω
39
14
25
20
15
10
VIN = 3.3V
VIN = 5V
5
0
0
PWM Signal
1kHz
10
20
30
40
50
60
70
80
90
100
PWM Duty (%)
Figure 6: AUX1 Channel Application Example Driving 4 WLEDs with Maximum 25mA Led Current.
VIN
L1
4.7μH
LXL1
OVL1
38
40
D1
R1
1.54MΩ
C2
1μF
D1
D2
R2
59kΩ
PGL
35mA
D3
37
D4
CSL1
ENL1
35
30
25
20
15
10
R3
73Ω
39
14
LED Current (mA)
AAT2610
AUX1 Channel
40
C1
1μF
VIN = 3.3V
VIN = 5V
5
0
0
PWM Signal
1kHz
10
20
30
40
50
60
70
80
90
100
PWM Duty (%)
Figure 7: AUX1 Channel Application Example of Driving 4 WLEDs with Maximum 35mA Led Current.
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31
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Ordering Information
Output Voltage
Package
Marking1
Part Number(Tape & Reel)2
Adj. 0.6V
TQFN55-40L
3GXYY
AAT2610IIC
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor
products that are in compliance with current RoHS standards, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. For more information, please visit our website at
http://www.analogictech.com/about/quality.aspx.
Package Information
TQFN55-40L3
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. 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.
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2610.2008.11.1.1
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Advanced Analogic Technologies, Inc.
3230 Scott Boulevard, Santa Clara, CA 95054
Phone (408) 737-4600
Fax (408) 737-4611
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual
property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice. Except as provided in AnalogicTech’s terms and
conditions of sale, AnalogicTech assumes no liability whatsoever, and AnalogicTech disclaims any express or implied warranty relating to the sale and/or use of AnalogicTech products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. In order to minimize risks associated with the customer’s applications, adequate
design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to
support this warranty. Specific testing of all parameters of each device is not necessarily performed. AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other
brand and product names appearing in this document are registered trademarks or trademarks of their respective holders.
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