350mA, 16.5V Input,

Low-Dropout Linear Regulators

_______________________________________________________________________________________

5

____________________________Typical Operating Characteristics (continued)

otherwise noted.)

B

A

0V

3.3V

100

µs/div

MAX1658 OVERSHOOT AND

TIME EXITING SHUTDOWN

MAX1658/59TOC14

A: OUTPUT VOLTAGE (1V/div)

B: SHDN PIN VOLTAGE (2V/div)

B

A

0V

5V

100

µs/div

MAX1659 OVERSHOOT AND

TIME EXITING SHUTDOWN

MAX1658/59TOC15

A: OUTPUT VOLTAGE (2V/div)

B: SHDN PIN VOLTAGE (2V/div)

10ms/div

OUTPUT NOISE

______________________________________________________________Pin Description

Ground

GND

8

Regulated Output Voltage. Fixed or adjustable from 1.25V to 16V. Sources up to 350mA. For stable opera-

tion, bypass with a 10µF, low-ESR (<0.2

Ω) capacitor from OUT to GND. For improved load-transient

response, use a larger low-ESR capacitor.

OUT

4, 5

Unregulated Input Supply Voltage, 2.7V to 16.5V input range. The IN pins also serve as heatsinks. Connect

to a copper plane to achieve maximum thermal dissipation.

IN

3, 6, 7

PIN

Shutdown Input. When SHDN is low, the device turns off and typically draws 0.1µA of supply current.

SHDN

2

Output Voltage Input. Connecting SET to ground selects the factory-preset 3.3V (MAX1658) or 5V

(MAX1659) output voltage. For an adjustable output voltage, connect SET to a resistive voltage divider from

OUT to GND.

SET

1

FUNCTION

NAME

10

10

50k

OUTPUT NOISE DENSITY

vs. FREQUENCY

FREQUENCY (Hz)