Low-Dropout, 300mA Linear Regulators in SOT23

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5

LINE-TRANSIENT RESPONSE

MAX8887/8 toc13

20mV/div

AC-COUPLED

4V

4.5V

100

μs/div

SHUTDOWN WAVEFORM

MAX8887/8 toc14

1V/div

DC-COUPLED

2V/div

Ω

20

μs/div

POK WAVEFORM

MAX8887/8 toc15

2V/div

2V/div

2V/div

Ω

20ms/div

Pin Description

MAX8887

MAX8888

NAME

FUNCTION

11

IN

Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with 2.2µF

capacitor to GND (see the Capacitor Selection and Regulator Stability section).

2

2

GND

Ground

33

SHDN

Active-Low Shutdown Input. A logic low reduces the supply current to below 0.1µA.

In shutdown, POK and OUT are driven low. Connect to IN for normal operation.

—4

POK

below the reset threshold. Connect a 100k

Ω pullup resistor to OUT to obtain a logic level

output. POK is driven low in shutdown. If not used, leave this pin unconnected.

4

—

BP

Reference Bypass. Bypass with a low-leakage 0.01µF ceramic capacitor.

5

5

OUT

Regulator Output. Sources up to 300mA guaranteed. Bypass with 2.2µF (<0.2

Ω typical

ESR) ceramic capacitor to GND.

LOAD-TRANSIENT RESPONSE

NEAR DROPOUT

MAX8887/8 toc12

50mV/div

AC-COUPLED

300mA

10mA

10

μs/div

Typical Operating Characteristics (continued)