_______________Detailed Description

The MAX869L P-channel MOSFET power switch limits

output current to a programmed level. When the output

current passes through the main switch, a smaller cur-

exceeds the trip voltage of 1.24V, the current-limit error

amplifier regulates the output current to the pro-

This switch is not bidirectional; therefore, the input volt-

age must be higher than the output voltage.

Setting the Current Limit

The MAX869L features internal current-limiting circuitry

remains in effect throughout the input supply-voltage

range.

SET to ground (Figure 2) as follows:

2A, Current-Limited, High-Side

P-Channel Switch with Thermal Shutdown

6

_______________________________________________________________________________________

*REFER TO

TYPICAL OPERATING CIRCUIT

USB* CIRCUIT OUTPUT RISE TIME

A

B

C

D

0V

0V

0V

0A

500µs/div

____________________________Typical Operating Characteristics (continued)

USB* CIRCUIT OUTPUT FALL TIME

A

B

C

D

0V

0V

0V

0A

500µs/div

_____________________Pin Description

PIN

Input, P-channel MOSFET source.

Bypass IN with a 1µF capacitor to

ground.

IN

1, 4, 5,

12, 13, 16

FUNCTION

NAME

Switch output. P-channel MOSFET

drain. Bypass OUT with a 0.1µF

capacitor to GND.

OUT

2, 3, 6,

11, 14, 15

Ground

GND

8

Active-Low Switch-On Input. A logic

low turns the switch on.

ON

7

Fault-Indicator Output. This open-

drain output goes low when in cur-

rent limit or when the die temperature

exceeds +135°C. FAULT remains low

for Turn-On Time + 50µs during start-

up.

FAULT

10

Set Current-Limit Input. A resistor

from SET to ground sets the current

rent limit in amperes.

SET

9