Analogic AAT4621ITP-T1 Pc card current limit interface and capacitor charger Datasheet

AAT4621
PC Card Current Limit Interface
and Capacitor Charger
General Description
Features
The AAT4621 SmartSwitch is a current limited Pchannel MOSFET power switch designed for highside load-switching applications in PC Card
GSM/GPRS/3G modem cards. Used in conjunction with a super capacitor, the AAT4621 will
ensure that the power ratings of the PCMCIA host
are not exceeded at any time. Featuring two independent, programmable current limits and a power
loop, the AAT4621 can ensure that the super
capacitor can be charged without exceeding PCMCIA specifications. The current limit is set by two
external resistors allowing a ±10% current limit
accuracy over the normal operating temperature
range. The switch can be controlled from either of
the two enable inputs and in the off condition will
block currents in both directions. The AAT4621
also incorporates a System READY function which
can advise the system that the super capacitor is
fully charged and ready for use. Adjustable hysteresis is provided with the addition of an external
resistor. The quiescent supply current is typically a
low 40µA. In shutdown mode, the supply current
decreases to less than 1µA.
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The AAT4621 is available in a thermally enhanced,
Pb-free, 12-pin TSOPJW or 14-pin TDFN33 package and is specified over the -40°C to 85°C temperature range.
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•
•
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SmartSwitch™
VIN Range: 3.0V to 5.5V
Dual Independent Current Limits
— 75mA to 1200mA
— ±10% Current Accuracy
— 20°C Temperature Band
Reverse Current Blocking Protection
Power Loop
Low Quiescent Current
— 40µA Typical
— 1.0µA Max with Switch Off
65mΩ Typical RDS(ON) at 3V
Only 1.4V Needed for Enable Control Pin
System READY Output with Externally
Programmable Hysteresis
Under-Voltage Lockout
Temperature Range: -40 to 85°C
12-Pin TSOPJW Package or 14-Pin TDFN33
Package
Applications
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•
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Capacitor Charger
CF Card Port Power Protection
Express Card GSM/GPRS/3G Modems
PC Card GSM/GPRS Class 10/12 Modems
WiMAX Cards
Typical Application
100kΩ
Reverse
Blocking
VCC
OUT
To Load
RDY
To μC
V CC
Over-Temp
Protection
Power
Loop
UnderVoltage
Lockout
EN IL
ENSUPERCAP
EN OPERATION
EN IU
1.2V
Reference
Current
Limit
Control
ISETL
ISETU
GND
SuperCap
R HYS
4621.2007.07.1.0
R SETU
R SETL
1
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Pin Descriptions
Pin #
TSOPJW-12
TDFN33-14
Symbol
1
14
EN IU
2
13
EN IL
3
4, 5, 6
12
8, 9, 10, 11
GND
VCC
7, 8
5, 6, 7
OUT
9
4
ISETL
10
3
ISETU
11
2
RHYS
12
1
RDY
Function
Enable input. Active low enable with internal pull up. Also switches in the
higher current limit to allow the System to start functioning. Can be directly
connected to System Ready for automatic enabling. When both EN IL B and
EN IU B are enabled, ISETU will be selected.
Enable input. Active low enable with internal pull up. Also switches in the
lower current limit initiating the super capacitor to start charging.
Device ground connection.
Input pins to the P-channel MOSFET source. Connect 1µF capacitor from
VCC to GND.
P-channel MOSFET drain connection. Connect to super capacitor from OUT
to GND.
Lower current-limit set input. A resistor from ISETU to ground sets the
maximum lower current limit for the switch. Current limit can be set between
75mA and 1200mA.
Upper current limit set input. A resistor from ISETL to ground sets the
maximum upper current limit for the switch. Current limits can be set
between 75mA and 1200mA. Connect to ground to disable current limit.
System READY hysteresis. Connect a resistor to ground to set the System
Ready comparator hysteresis.
System ready pin. Open drain, active low, initiated when the capacitor is 98%
charged.
Pin Configuration
TSOPJW-12
(Top View)
EN IU
EN IL
GND
VCC
VCC
VCC
2
1
12
2
11
3
10
4
9
5
8
6
7
TDFN33-14
(Top View)
RDY
RHYS
ISETU
ISETL
OUT
OUT
RDY
RHYS
ISETU
ISETL
OUT
OUT
OUT
1
14
2
13
3
12
4
11
5
10
6
9
7
8
ENIU
ENIL
GND
VCC
VCC
VCC
VCC
4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Absolute Maximum Ratings1
Symbol
VCC
VEN
VSET, VOUT
IMAX
Description
VCC to GND
EN to GND
SET, OUT to GND
Maximum Continuous Switch Current
Value
Units
-0.3 to 6
-0.3 to VCC + 0.3
-0.3 to VCC + 0.3
2.5
V
V
V
A
Value
Units
Thermal Characteristics
Symbol
Description
θJA
Maximum Thermal Resistance2
PD
Maximum Power Dissipation2
TJ
Operating Junction Temperature Range
TSOPJW-12
TDFN33-14
TSOPJW-12
TDFN33-14
160
50
625
2
-40 to 150
°C/W
mW
W
°C
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 an FR4 board.
4621.2007.07.1.0
3
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Electrical Characteristics1
VCC = 3.0V to 5.5V, TA = -40°C to 85°C unless otherwise noted. Typical values are at TA = 25°C.
Symbol
VCC
IQ
IQU0
Description
Conditions
Operation Voltage
Quiescent Current
Quiescent Current U0
Off Supply Current
Off Switch Current
Under-Voltage Lockout
RDS(ON)
On-Resistance
ILIMLACC
Lower Current Limit Accuracy
ILIMUACC
Upper Current Limit Accuracy
ILIM(MIN)
VEN(L)
VEN(H)
IEN(SINK)
TDEL(OFF)
Lower Minimum Current Limit
EN Input Low Voltage
EN Input High Voltage
EN Input Leakage
Turn-Off Delay Time
VCC =3.0V to 5.5V2
VCC = 3.0V to 5.5V2
VEN = 5.5V
VCC = 5V
System READY Trip Threshold
VOUT rising, TA = 25°C
System READY Hysteresis
System READY Voltage Low
RDY Leakage Current
Shutdown Temperature
RHYS = 200kΩ
ISINK = 1mA
VRDY < 5.5V, VOUT < 98% of VOUT
VRDYHYS
VRDY(L)
IRDY
OTMP
Typ
Max
Units
5.5
V
40
75
µA
40
75
µA
0.4
0.4
2.7
50
65
200
200
1000
1000
75
1.0
10
3.0
100
120
220
230
1100
1150
µA
µA
V
3.0
EN IL or EN IU = VCC, IOUT = 0,
RHYS = 200kΩ
EN IL = VCC, EN IU = GND, IOUT = 0,
ISET = GND, RHYS = 200kΩ
EN IL = EN IU = VCC
EN IL = EN IU = VCC, VSUPERCAP = 0
Rising edge, 1% hysteresis
VCC =4.75V, RSETL = RSETU = 0k
VCC =3.0V, RSETL = RSETU = 0k
RSETL = 249kΩ; ΔTA ≤ 20°C
RSETL = 249kΩ
RSETU = 1.24MΩ; ΔTA ≤ 20°C
RSETU = 1.24MΩ
IQ(OFF)
ISD(OFF)
VUVLO
VRDY
Min
180
170
900
850
0.4
1.4
0.4
98
1.0
1.0
200
0.4
1.0
145
mΩ
mA
mA
mA
V
V
µA
µs
% of
VOUT
mV
V
µA
°C
1. The AAT4621 is guaranteed to meet performance specification over the -40°C to 85°C operating temperature range and is assured by
design, characterization and correlation with statistical process controls.
2. For VIN outside this range consult the Typical EN Threshold curve.
4
4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Typical Characteristics
RSET vs. ILIM
Output Current vs. Output Voltage
(25°°C)
(RSETU = 249KΩ
Ω; T = 25°C)
1.40
0.25
1.20
VIN = 5V
1.00
0.20
ILIM (A)
Output Current (A)
0.30
0.15
0.10
VIN = 3.3V
0.60
VIN = 5V
0.40
0.05
0.20
0.00
0.00
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0
5
200
400
600
800
1000
1200
1400
1600
Output Voltage (V)
RSET (kΩ)
Reverse Off-Switch Current vs. Temperature
Off-Switch Current vs. Temperature
(ENUB = ENLB = VCC; VIN = 0V)
(ENUB = ENLB = VCC; VOUT = 0V)
100
100
10
10
VOUT = 5V
ISD(OFF) (µA)
IRSD(OFF) (µA)
VIN = 3.3V
0.80
1
0.1
VOUT = 3.3V
VIN = 5V
1
0.1
VIN = 3.3V
0.01
-40
-20
0
20
40
60
80
100
120
Temperature (°°C)
0.01
-40
-20
0
20
40
60
80
100
120
Temperature (°°C)
Off-Supply Current vs. Temperature
(ENUB = ENLB = VCC; VOUT = Open)
10
IQ(OFF) (µA)
VIN = 5V
1
0.1
VIN = 3.3V
0.01
-40
-20
0
20
40
60
80
100
120
Temperature (°°C)
4621.2007.07.1.0
5
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Typical Characteristics
RDS(ON) vs. Input Voltage
RDS(ON) vs. Temperature
(RSET = 0kΩ
Ω)
(RSET = 0Ω
Ω)
90
70
80
RDS(ON) (mΩ)
RDS(ON) (mΩ)
65
60
55
50
VIN = 3V
70
60
50
VIN = 5V
40
45
2.5
3
3.5
4
4.5
5
30
-40
5.5
-20
0
20
40
60
80
100
Temperature (°C)
Input Voltage (V)
VRHYS vs. RRHYS
ILIM vs. Temperature
(VIN = 4V; VOUT = 3.85V; ENLB = 0V; RSETL = 249kΩ
Ω)
2.00
205
1.80
200
1.40
ILIM (mA)
VRHYS (V)
1.60
1.20
1.00
0.80
0.60
195
190
0.40
0.20
185
0.00
0
500
1000
1500
-50
-25
0
RRHYS (kΩ
Ω)
100
(ENUB = 0V; ENLB = VCC; or ENLB = 0V; ENUB = VCC;VOUT = Open)
1020
55
1010
50
IQU (µA)
1000
ILIM (mA)
75
Quiescent Current IQU vs. Temperature
ILIM vs. Temperature
990
980
VIN = 5V
45
40
35
970
30
960
-25
0
25
50
Temperature (°C)
6
50
Temperature (°C)
(VIN = 4V; VOUT = 3.85V; ENUB = 0V; RSETU = 1.3MΩ
Ω)
950
-50
25
75
100
25
-40
VIN = 3.3V
-20
0
20
40
60
80
100
120
Temperature (°°C)
4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Typical Characteristics
VIH and VIL vs. Input Voltage
VIH and VIL vs. Input Voltage
(ENUB = Open; Vary ENLB; T = 25°C)
(ENLB = Open; Vary ENUB; T = 25°C)
1.1
1.1
VIH
VIH
1.0
VIH and VIL (V)
VIH and VIL (V)
1.0
0.9
0.8
VIL
0.9
0.8
VIL
0.7
0.7
0.6
2.5
3.5
4.5
5.5
6.5
7.5
0.6
2.5
Input Voltage (V)
3.5
4.5
Input Voltage (V)
Output Voltage (V)
0.8
0.6
0.4
0.2
0.0
Output Current (A)
1.0
6
4
VIN
2
VOUT
0
1.5
1.0
IOUT
0.0
Time (2ms/div)
Time (20ms/div)
Hard Short Circuit
(VIN = 3.3V)
(VIN = 3.3V)
Input Voltage (V)
Output Voltage (V)
VIN and VOUT
3
IOUT
0.4
0.2
0.0
Time (2ms/div)
4621.2007.07.1.0
0.6
Output Current (A)
5
4
2
0
VIN
VOUT
1.5
1.0
IOUT
0.5
0.0
Output Current (bottom) (A)
6
Input Voltage (top) (V)
Output Voltage (middle) (V)
Soft Short Circuit with 5Ω
Ω Series Impedance
4
0.5
Output Current (bottom) (A)
VIN and VOUT
Input Voltage (top) (V)
Output Voltage (middle) (V)
(VIN = 5V)
6
I OUT
7.5
Hard Short Circuit
(VIN = 5V)
4
6.5
Input Voltage (V)
Soft Short Circuit with 5Ω
Ω Series Impedance
5
5.5
Time (20ms/div)
7
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Typical Characteristics
Charging Profile
Charging Profile
(ILIMIT = 150mA; VIN = 4.5V; CO = 0.55F)
(ILIMIT = 1A; ENIU = 0V; VIN = 4.5V; CO = 0.55F)
6
2
0
0.15
0.10
I OUT
0.05
0.00
Output Voltage (V)
VOUT
4
0.4
IOUT
0.2
0.0
1.5
1.0
0.5
0.0
-0.5
Input Voltage (top) (V)
Output Voltage (middle) (V)
2.0
VIN = 3.83V
VOUT = 3.76V
2.0
1.5
1.0
I OUT
0.5
0.0
-0.5
Output Current (bottom) (A)
Input Voltage (top) (V)
Output Voltage (middle) (V)
0.6
GSM900 GPRS Class 12 Transmit
2-Slot Ch975, 33dBm
Output Current (bottom) (A)
8
0.8
Time (1s/div)
VIN = 3.83V
Time (1ms/div)
1.0
0
GSM900 GPRS Class 12 Transmit
1-Slot Ch975, 33dBm
I OUT
VOUT
2
Time (5s/div)
VOUT = 3.80V
Thermal Foldback
Output Current (A)
4
Output Current (A)
Output Voltage (V)
6
Time (1ms/div)
4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Functional Block Diagram
Reverse
Blocking
OUT
VCC
Over-Temp
Protection
Power
Loop
UnderVoltage
Lockout
RDY
EN IL
EN IU
1.2V
Reference
Current Limit
Control
GND
Functional Description
The AAT4621 is an integrated P-channel MOSFET
load switch with an upper and lower adjustable current limits which can be enabled independently,
over temperature protection, a power loop and a
super capacitor charger. The current limit control is
combined with an over temperature thermal limit
and power loop circuit to provide a comprehensive
system to protect the load switch and its supply
from load conditions which exceed the supply specifications. The AAT4621 has been designed specifically to provide the interface between a PCMCIA
4621.2007.07.1.0
ISETL
ISETU
RHYS
host and PC card where a super capacitor has
been used to "average out" high pulse currents
which would otherwise exceed the PCMCIA/
Express Card power specifications. e.g. GSM/
GPRS modem cards, where pulse currents during
transmit signals can exceed the 1A maximum specification (1.3A in the case of Express Card).
The current limit and over temperature circuits act
independently. The device current limit is activated
when the output load current exceeds an internal
threshold level. There are two internal current limits which are enabled independently. The current
limit threshold in each case is determined by exter-
9
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
nal resistors connected between the two SET pins
and ground. The minimum current limit threshold is
specified by ILIM(MIN). If the load condition maintains
the device in current limit and the chip temperature
reaches a critical point, then an internal power loop
will reduce the current to a safe level. Connecting
ISETU to ground disables the current limit protection allowing a low impedance path to the host VCC.
The load switch is turned off by applying a logic
high level to both of the EN pins. When both EN IL
and EN IU are selected ISETU will be selected.
The EN function has logic level thresholds that
allow the AAT4621 to be TTL compatible and may
also be controlled by 2.5V to 5.0V CMOS circuits.
The voltage level applied to the EN pins should not
exceed the input supply level present on the VCC
pin. The AAT4621 typically consumes 40µA when
operating, when off, the device draws less then
1µA. In the off state, current is prevented from flowing between the input and output.
Under-voltage lockout circuitry ensures that the
VCC supply is high enough for correct operation of
the IC. Also included is a System Ready function
which will be activated when the capacitor voltage
is charged and the load is permitted to take current.
For automatic functionality, this pin can be directly
connected to the EN IU pin. An external resistor is
provided to add hysteresis to this function.
Application Information
ISETU and ISETL Current Limit Set
The AAT4621 current limit is set at two different levels. Resistors from ISETL and ISETU set the lower
and upper current limit levels respectively.
The ISETL and ISETU nodes operate within a window of 0.75V to 1.5V for resistor values ranging from
93.75Ω to 1.5MΩ. Resistor values outside this range
are not recommended. The ISETL and ISETU
source current varies with the resistor value used
according to Table 1. To determine the resulting current limit multiply the RSETU or RSETL node voltage
times the gain in Table 1. Note that the voltage at the
node varies from 0.75V to 1.5V and the current limit
gain varies depending on the resistor value used.
VISET = RSET · IISET = 0.75V to 1.5V
If the set pin is open circuit or allowed to exceed
2V, all power devices are disabled and the input is
disconnected from the output. Shorting the set pin
to GND enables all power devices and shorts the
VCC to the output pin with no current limit.
To activate the upper current level (RSETU) pull EN IU
low. To activate the lower current level (RSETL) pull
EN IL low. If both EN IU and EN IL are pulled low the
EN IU current limit level (RSETU) will be selected.
RSET Range
IISET (µA)
ILIM/VISET (A/V)
Current Limit Range (A)
Current Limit
1.5Meg - 750k
750k - 375k
375k - 187.5k
187.5 - 93.75k
1
2
4
8
0.8
0.4
0.2
0.1
1.2-0.6
0.6-0.3
0.3-0.15
0.15-0.075
RSET*1µA*0.8
RSET*2µA*0.4
RSET*4µA*0.2
RSET*8µA*0.1
Table 1: RSET Table.
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4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
die temperature is less than 110°C, it increases the
load current in increments of 1/32 of the current limit
set point until the set current limit point is reached or
the die temperature exceeds 110°C.
ILOAD vs. RSETU and RSETL
1.2
ILOAD Limit (A)
1.0
The delay time between die temperature measurements varies depending on the load current limit
set point. The delay ranges from 0.5ms for a 75mA
current limit set point to 4ms for a 1.2A current limit
set point.
0.8
0.6
0.4
0.2
0.0
0.10
0.30
0.50
0.70
0.90
1.10
1.30
1.50
RSETU and RSETL (MΩ
Ω)
Figure 1: Calculated Current Limit RSET
Characteristic.
System Ready Hysteresis (RHYS) and
System Ready (RDY)
In internal comparator senses the output voltage
and delivers a ready signal to the external micro
controller when the output voltage reaches 98% of
the final value (VCC). The comparator hysteresis is
programmed by a resistor from the RHYS pin to
ground. The RHYS voltage determines the hysteresis voltage and is equal to the RHYS source
current (1µA) times the RHYS resistance.
VHYST = RHYS · 1μA
= 200kΩ · 1μA
= 0.2V
The system ready pin (RDY) is an open drain output that switches low when the output voltage
reaches 98% of the input voltage. It requires an
external pull up resistor tied to the input voltage
with a typical value of 100kΩ.
Power Loop
The AAT4621 power loop limits the load current in
the event that the device power dissipation becomes
excessive. The AAT4621 power loop regulates the
die temperature to 110°C, decreasing the load current in increments of 1/32 of the current limit set point
when the die temperature reaches 110°C. When the
die temperature exceeds 110°C it decreases the
load current by 1/32 of the current limit set point. If
4621.2007.07.1.0
For the condition where there is no current limit set
point (shorting RSETU or RSETL to ground) the soft
start increments the current limit is 1/32 steps of
1.2A until the current reaches 1.2A, at which point
the power MOSFET turns on fully. At this point, the
current is limited by the RDS(ON) of the power MOSFET and other series resistance. The Power Loop
and Over-Temperature Loop then takes control to
limit the current until the output voltage has fully
charged.
Over-Temperature Protection
If the die temperature rate of rise is fast enough to
exceed the power loop regulated temperature,
over-temperature shutdown disables the device.
The over-temperature threshold is 145°C. After
over-temperature shutdown, soft start is initiated
once the die temperature drops to 130°C.
Short Circuit Protection
The series pass power MOSFET turns off completely after the output has charged to within 18mV of the
input voltage. This protects the device in the event
where a short circuit is applied to the output. After
applying a short circuit or heavy load to the output,
which causes the output to sink below the 18mV
threshold plus some hysteresis, the current will
immediately attempt to slew from zero to the final
programmed value. The device will continue to output the current limit as long as the output is VIN 18mV or until the die temperature reaches 110ºC. If
temperature foldback occurs, then the power loop
will become active.
Under-Voltage Shutdown
Under-voltage lockout enables the device at 2.7V
typical with 100mV of hysteresis. The maximum
UVLO level is 3.0V.
11
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Digitally Programmed Soft Start
Current Limit
Reverse Current Blocking
An internal comparator disables the internal pass
transistor when the input voltage is less than the
output voltage blocking any reverse current from
the output to the input.
At turn on, the digital soft start increases the load
current in discrete levels equal to 1/32 of the final
programmed current limit set point from zero to the
final programmed current limit level.
Evaluation Board
Once the AAT4621 has fully charged the supercap,
the soft start circuit is disabled. The soft start function
will only reactivate under the following conditions:
The evaluation board schematic is shown in Figure 2.
The PCB layout for the TSOP package is shown in
Figures 3 and 4. The TDFN package layout is
shown in Figures 5 and 6.
1. The power source or enable is cycled off and
back on.
2. The thermal shutdown is activated
3. Switching from ENU to ENL or vice versa or
4. Following an over current event e.g. a hard output short circuit.
J2
3
R1
4.7K
2
1
D1
ENIU
J1
1
ENIU
RDY
12
RDY
3
2
2
ENIL
RHYS
11
3
GND
ISETU
10
4
VCC
ISETL
9
5
VCC
OUT
8
6
VCC
OUT
7
1
ENIL
VCC
2
GND
1
J4
AAT4621
C1
10μF
C2
10μF
R3
1.00M
R2
200K
R4
120K
1
Out
2
GND
J3
Figure 2: AAT4621 Evaluation Board Schematic.
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4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Figure 3: AAT4621 TSOPJW-12 Evaluation Board PCB Top Side.
Figure 4: AAT4621 TSOPJW-12 Evaluation Board PCB Bottom Side.
4621.2007.07.1.0
13
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Figure 5: AAT4621 TDFN33-14 Evaluation Board PCB Top Side
Figure 6: AAT4621 TDFN33-14 Evaluation Board PCB Bottom Side
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4621.2007.07.1.0
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
Ordering Information
Package
Marking1
Part Number (Tape and Reel)2
TSOPJW-12
TDFN33-14
YWXYY
AAT4621ITP-T1
AAT4621IWO-T1
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/pbfree.
Package Information3
TSOPJW-12
2.85 ± 0.20
2.40 ± 0.10
0.10
0.20 +- 0.05
0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC
7° NOM
0.04 REF
0.055 ± 0.045
0.15 ± 0.05
+ 0.10
1.00 - 0.065
0.9625 ± 0.0375
3.00 ± 0.10
4° ± 4°
0.45 ± 0.15
0.010
2.75 ± 0.25
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.
4621.2007.07.1.0
15
AAT4621
PC Card Current Limit Interface
and Capacitor Charger
TDFN33-14
Detail "A"
3.000 ± 0.050
2.500 ± 0.050
Index Area
(D/2 x E/2)
3.000 ± 0.050
1.650 ± 0.050
Top View
Bottom View
Pin 1 Indicator
(Optional)
0.180 ± 0.050
Side View
0.400 BSC
0.005 ± 0.005
0.203 REF
0.750 ± 0.050
0.425 ± 0.050
Detail "A"
All dimensions in millimeters.
© 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.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
16
4621.2007.07.1.0
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