RT9173/A
2.5V
3.3V
1.25V
VIN
VCNTL
REFEN RT9173/A VOUT
GND
VOUT
A
IL
V
COUT
Fig.3 Current Limit for High Side, ICLHIGH
Power supply
with current limit
2.5V
3.3V
1.25V
VIN
VCNTL
REFEN RT9173/A VOUT
GND
A
IL
VOUT
V
COUT
Fig.4 Current Limit for Low Side, ICLLOW
2.5V
3.3V
1.25V
VREFEN 0.2V
VIN
VCNTL
REFEN RT9173/A VOUT
GND
RL
1.25V
VOUT
0V
VOUT would be low if VREFEN < 0.2V
VOUT would be high if VREFEN > 0.8V
RL and COUT
Time delay
VOUT
V
COUT
Fig.5 REFEN Pin Shutdown Threshold, VTRIGGER
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4
DS9173/A-06 March 2002