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LT1762 Series

150mA, Low Noise, LDO

Micropower Regulators

s

Low Noise: 20

s

Low Quiescent Current: 25

µA

s

Wide Input Voltage Range: 1.8V to 20V

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Output Current: 150mA

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Very Low Shutdown Current: < 1

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Low Dropout Voltage: 300mV

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No Protection Diodes Needed

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Fixed Output Voltages: 2.5V, 3V, 3.3V, 5V

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Adjustable Output from 1.22V to 20V

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Stable with 2.2

µF Output Capacitor

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Stable with Aluminum, Tantalum or

Ceramic Capacitors

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Reverse Battery Protection

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No Reverse Current

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Overcurrent and Overtemperature Protected

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8-Lead MSOP Package

The LT

dropout regulators. The devices are capable of supplying

150mA of output current with a dropout voltage of 300mV.

Designed for use in battery-powered systems, the low

25

µA quiescent current makes them an ideal choice.

Quiescent current is well controlled; it does not rise in

dropout as it does with many other regulators.

A key feature of the LT1762 regulators is low output noise.

With the addition of an external 0.01

µF bypass capacitor,

output noise drops to 20

bandwidth. The LT1762 regulators are stable with output

capacitors as low as 2.2

µF. Small ceramic capacitors can

be used without the series resistance required by other

regulators.

Internal protection circuitry includes reverse battery pro-

tection, current limiting, thermal limiting and reverse

current protection. The parts come in fixed output volt-

ages of 2.5V, 3V, 3.3V and 5V, and as an adjustable device

with a 1.22V reference voltage. The LT1762 regulators are

available in the 8-lead MSOP package.

Dropout Voltage

3.3V Low Noise Regulator

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Cellular Phones

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Battery-Powered Systems

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Frequency Synthesizers

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Noise-Sensitive Instrumentation Systems

, LTC and LT are registered trademarks of Linear Technology Corporation.

IN

SHDN

0.01

µF

10

µF

1762 TA01

OUT

SENSE

3.7V TO

20V

BYP

GND

LT1762-3.3

3.3V AT 150mA

20

1

µF

+

OUTPUT CURRENT (mA)

0

400

350

300

250

200

150

100

50

0

80

100 120 140

1762 TA02

20

40

60

160

APPLICATIO S

DESCRIPTIO

FEATURES