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LT1962 Series

300mA, Low Noise,

Micropower

LDO Regulators

s

Low Noise: 20

s

Output Current: 300mA

s

Low Quiescent Current: 30

µA

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Wide Input Voltage Range: 1.8V to 20V

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Low Dropout Voltage: 270mV

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Very Low Shutdown Current: < 1

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No Protection Diodes Needed

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Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V

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Adjustable Output from 1.22V to 20V

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Stable with 3.3

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

300mA of output current with a dropout voltage of 270mV.

Designed for use in battery-powered systems, the low

30

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 LT1962 regulators is low output noise.

With the addition of an external 0.01

µF bypass capacitor,

output noise drops to 20

bandwidth. The LT1962 regulators are stable with output

capacitors as low as 3.3

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 cur-

rent protection. The parts come in fixed output voltages of

1.5V, 1.8V, 2.5V, 3V, 3.3V and 5V, and as an adjustable

device with a 1.22V reference voltage. The LT1962 regu-

lators are available in the 8-lead MSOP package.

3.3V Low Noise Regulator

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Cellular Phones

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Battery-Powered Systems

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Noise-Sensitive Instrumentation Systems

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

LOAD CURRENT (mA)

0

400

350

300

250

200

150

100

50

0

1962 TA02

100

200

300

50

150

250

Dropout Voltage

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

IN

SHDN

0.01

µF

10

µF

1962 TA01

OUT

SENSE

3.7V TO

20V

BYP

GND

LT1962-3.3

3.3V AT 300mA

20

1

µF

+