Datasheet

R
SET
R
IMON
POR
B0438-03
+
VCC
Summing
Point
GATE
0~60 µA
11 mA
30 µA
+
60 mV
1-shot
2.22 V
UVLO
1.5 V
Fault Logic
Charge
Pump
SENSE
R
GATE
2.32 V
675 mV
OUT
V
IN
Servo
Amplifier
Fast
Comparator
PGb
14 µs
TSD
DC
PG
Comparator
Main Opamp in Inrush
Limit Becomes Comparator
After Inrush Limit Complete
2 ms
10 µA
10 µA
+
+
–
VCC
6 V
Gate
Comparator
20 kΩ
TIMER
Inrush
Latch
240 mV
GND
M
1
C
T
DC
S
R
Q
Q
+
170 mV
+
+
R
SENSE
+
1.3 V
1.35 V
+
2
EN
8
3
5
1
4
7
–
–
–
–
–
–
–
–
6
TPS24700
TPS24701
www.ti.com SLVSAL3B – MARCH 2011– REVISED MAY 2011
FUNCTIONAL BLOCK DIAGRAM
Figure 4. Block Diagram of the TPS24700/1
PIN FUNCTIONS
NAME TPS24700/1 I/O DESCRIPTION
EN 2 I Active-high enable input. Logic input. Connects to resistor divider
GATE 6 O Gate driver output for external MOSFET
GND 4 – Ground
OUT 5 I Output voltage sensor for monitoring MOSFET power
PGb 1 O Active-low, open-drain power good indicator. Status is determined by the voltage across the MOSFET.
SENSE 7 I Current sensing input for resistor shunt from VCC to SENSE
TIMER 3 I/O A capacitor connected from this pin to GND provides a fault timing function.
VCC 8 I Input-voltage sense and power supply
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Product Folder Link(s): TPS24700 TPS24701