LTC1646
TEST DIAGRA
V3VONLY No 5V Input Mode Window Voltage
V3VONLY = 5VIN – 3VIN 5VOUT = 3VOUT = 3.3V, 3VIN = 3.3V
V5VIN
3.3V
V3VONLY
–V3VONLY
5V
PWRGD
0V
1646 T01
TI I G DIAGRA S
tOC Overcurrent Fault Detect
FALL TIME ≤ 1µs, 5VIN = 5V, 3VIN = 3.3V
5V
V5VSENSE OR 3.3V
OR
V3VSENSE
100mV
FAULT
tOC
1V
1646 T02
8
tSC Short-Circuit Fault Detect
FALL TIME ≤ 30ns, 5VIN = 5V, 3VIN = 3.3V
5V
V5VSENSE OR 3.3V
OR
V3VSENSE
200mV
FAULT
tSC
1V
1646 T03