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TPS65720_15 Datasheet, PDF (6/66 Pages) Texas Instruments – Integrated PMIC
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TPS65720, TPS657201, TPS657202, TPS65721
SLVS979A – OCTOBER 2009 – REVISED SEPTEMBER 2015
RSN Package
32-Pin WQFN With Thermal Pad
Top View
HOLD_DCDC1
FB_DCDC1
TS
AGND
GND
VINLDO1
VLDO1
NC
24 23 22 21 20 19 18 17
25
16
26
TPS65721
27
15
14
28
13
29
12
30
11
31
10
32
9
12345678
ISET
PB_IN
RESET
INT
SDAT
MODE
NC
NC
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PIN
NAME
AC
AGND
BAT
FB_DCDC1
FB_LDO1
GND
GPIO0
GPIO1
GPIO2
GPIO3
HOLD_DCDC1
HOLD_LDO1
INT
ISET
L1
MODE
PB_IN
PGND
RESET
SCLK
SDAT
SYS
THRESHOLD
TS
VINLDO1
VLDO1
ThermalPad
NO.
17, 18
28
21, 22
26
1
29
7
6
5
4
25
2
13
16
23
11
15
24
14
8
12
19, 20
3
27
30
31
—
Pin Functions—WQFN (TPS65721)
I/O
DESCRIPTION
I Input power for power manager, connect to external DC supply.
— Analog ground
I/O Connect to battery + terminal
I Feedback input of step-down converter
I Feedback input for LDO1
— Connect to AGND and PGND
I/O General purpose I/O
I/O General purpose I/O
I/O General purpose I/O or 5-mA current source
I/O General purpose I/O or 5-mA current source
I
Power-on input for DCDC1 converter. When pulled HIGH, the DC-DC converter is kept enabled
after PB_IN was released HIGH.
I
Power-on input for LDO1. When pulled HIGH, LDO1 is kept enabled after PB_IN was released
HIGH.
O Open-drain interrupt output
I Connect a resistor from this pin to GND to set fast charge current
O Switch output of step-down converter
I Pull HIGH to force the DCDC1 converter to PWM mode.
I Push button input; Turns on DCDC1 and LDO1 if pulled to GND.
— Power ground
O
Open-drain output of the reset generator; This output goes active LOW when the input voltage at
pin THRESHOLD falls below the threshold voltage.
I Clock input for the I2C interface
I/O Data line for the I2C interface
O System voltage; output of the power path manager. Power input for step-down converter DCDC1
I
Input voltage to the reset comparator. When the input voltage falls below the threshold, the RESET
output is actively pulled LOW.
I Connect a thermistor from this pin to GND for battery temperature
I Input voltage for LDO1
O Output voltage from LDO1
— Connect to GND
6
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