1

LT1764A Series

1764afb

3A, Fast Transient

Response, Low Noise,

LDO Regulators

µA Quiescent Current in Shutdown

µF Output Capacitor*

The LT

fast transient response. The device is capable of supplying

3A of output current with a dropout voltage of 340mV.

Operating quiescent current is 1mA, dropping to < 1

µA 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 LT1764A has very

low output voltage noise which makes the device ideal for

sensitive RF supply applications.

Output voltage range is from 1.21V to 20V. The LT1764A

regulators are stable with output capacitors as low as 10

µF.

Internal protection circuitry includes reverse battery pro-

tection, current limiting, thermal limiting and reverse cur-

rent protection. The device is 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 LT1764A regu-

lators are available in 5-lead TO-220 and DD packages, and

16-lead FE packages.

Dropout Voltage

■

3.3V to 2.5V Logic Power Supply

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

IN

SHDN

10

µF*

*TANTALUM,

CERAMIC OR

ALUMINUM ELECTROLYTIC

1764 TA01

OUT

SENSE

GND

LT1764A-2.5

2.5V

3A

10

µF*

+

+

LOAD CURRENT (A)

0

0.5

1.0

2.0

1.5

2.5

3.0

1764 TA02

400

350

300

250

200

150

100

50

0

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

All other trademarks are the property of their respective owners.

*See Applications Information Section.