
MAX1693/(MAX1693H)/MAX1694
USB Current-Limited Switches
with Fault Blanking
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(VIN = +5V, TA = +25°C, unless otherwise noted.)
4
3
1
2
2ms/div
MAX1693/4
toc10
MAX1693
CURRENT-LIMIT AND FAULT RESPONSE
CH1 = VIN, 200mV/div, AC-COUPLED; CH2 = VOUT,
5V/div; CH3 = VFAULT, 5V/div; CH4 = IOUT, 500mA/div
4
10
s/div
3
1
2
MAX1693
CURRENT-LIMIT RESPONSE
MAX1693/4
toc11
CH1 = VIN, 200mV/div, AC-COUPLED; CH2 = VOUT,
5V/div; CH3 = VFAULT, 5V/div; CH4 = IOUT, 1A/div
4
3
2
1
MAX1693
SWITCH TURN-ON TIME
MAX1693/4
toc12
CH1 = VOUT, 5V/div; CH2 = VON, 5V/div;
CH3 = VFAULT, 5V/div; CH4 = IOUT, 200mA/div
20
s/div
0
2
6
4
10
8
12
-40
0
20
-20
406080
100
FAULT-BLANKING TIMEOUT
vs. TEMPERATURE
MAX1693/4
toc09
TEMPERATURE (°C)
FAULT-BLANKING
TIMEOUT
(ms)
IOUT = 850mA
VIN = 3V OR 5V
4
3
2
1
MAX1693
SWITCH TURN-OFF TIME
MAX1693/4
toc13
CH1 = VOUT, 5V/div; CH2 = VON, 5V/div;
CH3 = VFAULT, 5V/div; CH4 = IOUT, 200mA/div
1
s/div
4
3
2
1
MAX1693
STARTUP TIME
(TYPICAL USB APPLICATION)
MAX1693/4
toc14
CH1 = VOUT, 5V/div; CH2 = VON, 5V/div;
CH3 = IOUT, 500mA/div; CH4 = VFAULT, 5V/div
CL = 150
F
RL = 15
1ms/div
FULL-CURRENT LIMIT
CHARGES CAPACITOR
RESISTOR
LOAD
CURRENT
FOLDBACK-
CURRENT LIMIT