LT1963ET View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT1963ET

1.5A, Low Noise, Fast Transient Response LDO Regulators

Linear Technology 

LT1963 Series

1.5A, Low Noise,

Fast Transient Response

LDO Regulators

FEATURES

■ Optimized for Fast Transient Response

■ Output Current: 1.5A

■ Dropout Voltage: 340mV

■ Low Noise: 40µVRMS (10Hz to 100kHz)

■ 1mA Quiescent Current

■ No Protection Diodes Needed

■ Controlled Quiescent Current in Dropout

■ Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V

■ Adjustable Output from 1.21V to 20V

■ < 1µA Quiescent Current in Shutdown

■ Stable with 10µF Output Capacitor

■ Reverse Battery Protection

■ No Reverse Current

■ Thermal Limiting

■ 5-Lead TO-220, DD, 3-Lead SOT-223, 8-Lead SO

and 16-Lead TSSOP Packages

U

APPLICATIO S

■ 3.3V to 2.5V Logic Power Supplies

■ Post Regulator for Switching Supplies

TYPICAL APPLICATION

VIN > 3V

3.3V to 2.5V Regulator

+

10µF

IN

OUT

LT1963-2.5

SHDN SENSE

GND

2.5V

+

1.5A

10µF

1963 TA01

DESCRIPTIO

The LT®1963 series are low dropout regulators optimized

for fast transient response. The devices are capable of

supplying 1.5A of output current with a dropout voltage of

340mV. Operating quiescent current is 1mA, dropping to

< 1µA in shutdown. Quiescent current is well controlled; it

does not rise in dropout as it does with many other

regulators. In addition to fast transient response, the

LT1963 regulators have very low output noise which

makes them ideal for sensitive RF supply applications.

Output voltage range is from 1.21V to 20V. The LT1963

regulators are stable with output capacitors as low as

10µF. Internal protection circuitry includes reverse battery

protection, current limiting, thermal limiting and reverse

current protection. The devices are available in fixed

output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an

adjustable device with a 1.21V reference voltage. The

LT1963 regulators are available in 5-lead TO-220, DD,

3-lead SOT-223, 8-lead SO, and Exposed Pad 16-lead

TSSOP packages.

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

All other trademarks are the property of their respective owners. Protected by U.S. Patents,

including 6118263, 6144250.

Dropout Voltage

400

350

300

250

200

150

100

50

0

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

OUTPUT CURRENT (A)

1963 TA02

1963fc

1

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