Datasheet

-50 -25 0 25 50 75 100 125
Temperature-°C
153.5
154
154.5
155
155.5
156
156.5
ResetThreshold-mV
V =12V
DD
-50 -25 0 25 50 75 100 125
Temperature-°C
4
4.05
4.1
4.15
4.2
4.25
4.3
UVLOTurnon-V
Turnoff
Turnon
-50 -25 0 25 50 75 100 125
Temperature-°C
1.56
1.57
1.58
1.59
1.6
1.61
1.62
1.63
1.64
1.65
1.66
I -mA
DD
V =12V
DD
5 10 15 20 25 30 35 40 45 50 55
V -V
DD
0
0.5
1
1.5
2
2.5
3
I -mA
DD
TPS40200-EP
www.ti.com SGLS371A –JANUARY 2007–REVISED JANUARY 2013
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
Switching frequency-setting RC network. Connect capacitor from RC pin to GND pin and resistor from V
IN
RC 1 I pin to RC pin. The device may be synchronized to an external clock by connecting an open-drain output to
this pin and pulling it to GND. The pulse width for synchronization should not be excessive.
Soft-start programming pin. Connect capacitor from SS to GND to program soft-start time. Pulling this pin
SS 2 I below 150 mV causes the output switching to stop, placing the device in a shutdown state. The pin also
functions as a restart timer for overcurrent events.
COMP 3 O Compensation. Error amplifier output. Connect control-loop compensation network from COMP to FB.
FB 4 I Feedback. Error amplifier inverting input. Connect feedback resistor network center tap to this pin.
GND 5 Device ground
GDRV 6 O Driver output for external P-channel MOSFET
Current-sense comparator input. Connect a current sense resistor between ISNS and V
DD
in order to set
ISNS 7 I
desired overcurrent threshold.
VDD 8 I System input voltage. Connect local bypass capacitor from V
DD
to GND.
TYPICAL CHARACTERISTICS
QUIESCENT CURRENT QUIESCENT CURRENT
vs vs
TEMPERATURE V
DD
Figure 4. Figure 5.
SOFT-START THRESHOLD UVLO TURNON AND TURNOFF
vs vs
TEMPERATURE TEMPERATURE
Figure 6. Figure 7.
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