-5V/-12V/-15V or Adjustable,

8

_______________________________________________________________________________________

______________________________________________________________Pin Description

PIN

NAME

FUNCTION

1

OUT

2

FB

3

SHDN

4

REF

1.5V reference output that can source 100

µA. Bypass to ground with 0.1µF.

5

V+

Positive power-supply input

6

CS

Noninverting input to the current-sense comparator. Typical trip level is 210mV (relative to V+).

7

EXT

The gate-drive output for an external P-channel power MOSFET. EXT swings from OUT to V+.

8

GND

Ground

and it is the negative supply input for the EXT driver.

use an external voltage divider, as described in the

Adjustable Output section.

Active-high shutdown input. With SHDN high, the part is in shutdown mode and the supply current is less

than 5

µA. Connect to GND for normal operation.

____________________________Typical Operating Characteristics (continued)

CIRCUIT OF FIGURE 2

LOAD-TRANSIENT RESPONSE

100

µs/div

A

B

CIRCUIT OF FIGURE 2

A: V+, 3V TO 8V, 5V/div

LINE-TRANSIENT RESPONSE

2ms/div

A

B