LT1962 - 300mA, Low Noise, Micropower LDO Regulators

FEATURES

Low Noise: 20µVRMS 

(10Hz to 100kHz)

Output Current: 300mA

Low Quiescent Current: 30µA

Wide Input Voltage Range: 1.8V to 20V

Low Dropout Voltage: 270mV

Very Low ShutdowCurrent: < 1µA

No ProtectioDiodes Needed

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

Adjustable Output from 1.22V to 20V

Stable with 3.3µF Output Capacitor

Stable with Aluminum, Tantalum or

Ceramic Capacitors

Reverse Battery Protection

No Reverse Current

Overcurrent and Overtemperature Protected

8-Lead MSOP Package

APPLICATIONS

Cellular Phones

Battery-Powered Systems

Noise-Sensitive InstrumentatioSystems

DESCRIPTION

The LT®1962 series are micropower, low noise, low

dropout regulators. The devices are capable of supplying

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

Designed for use ibattery-powered systems, the low

30µA quiescent current makes them aideal 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 additioof aexternal 0.01µF bypass capacitor,

output noise drops to 20µVRMS over a 10Hz to 100kHz

bandwidth. The LT1962 regulators are stable with output

capacitors as low as 3.3µF. Small ceramic capacitors can

be used without the series resistance required by other

regulators.

Internal protectiocircuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The parts come ifixed output voltages of

1.5V, 1.8V, 2.5V, 3V, 3.3V and 5V, and as aadjustable

device with a 1.22V reference voltage. The LT1962 regulators are available ithe 8-lead MSOP package.

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