Datasheet
0.7 V
POR
Turn Off Main Circuit
ENSD
10 μA
0.9 V
+
+
B0438-01
+
VCC
GATE
0~60 µA
11 mA
30 µA
+
60 mV
1-shot
2.22 V
UVLO
1.5 V
Fault Logic
1.35 V
0.35 V
Charge
Pump
SENSESET
R
GATE
R
SET
PROG
IMON
2.32 V
OUT
V
IN
–
Servo
Amplifier
Fast
Comparator
OUT
PGb
FLTb
14 µs
TSD
DC
PG
Comparator
Main Opamp in Inrush
Becomes Comparator
After Inrush Limit
Complete
2 ms
10 µA
10 µA
+
+
–
VCC
5.9 V
Gate
Comparator
20 kΩ
TIMER
Inrush
Latch
240 mV
+
GND
M
1
C
T
DC
S
R
Q
Q
+
170 mV
+
+
R
SENSE
R
PROG
R
IMON
+
+
1.3 V
1.35 V
+
1
EN
2
6
12
3
8
15
13
4
11
–
–
–
–
–
–
–
–
10
1.2 μs
5
OV
+
1.29 V
1.35 V
16
FFLTb
9
7
LATCH
14
A
B
KpA
, 675 mV
B
Min
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TPS24720
SLVSAL1C –MARCH 2011–REVISED SEPTEMBER 2013
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
Figure 5. Block Diagram of the TPS24720
PIN FUNCTIONS
NAME PIN I/O DESCRIPTION
EN 1 I Active-high enable input. Logic input. Connects to resistor divider.
ENSD 16 I Pull low to put device into low-current standby mode. Logic input.
FFLTb 9 O Active-low, open-drain FET fault indicator. Indicates shorted MOSFET when output is off.
FLTb 13 O Active-low, open-drain output indicates overload fault timer has turned MOSFET off.
GATE 10 O Gate driver output for external MOSFET
GND 4 – Ground
IMON 6 O Analog load current limit program point. Connect R
IMON
to ground.
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