LT1965

1

1965f

OUTPUT CURRENT (A)

0

0

100

200

300

0.2

0.4

0.6

0.8

1

400

50

150

250

350

1.2

1965 TA01b

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

1.1A, Low Noise,

Low Dropout Linear Regulator

The device supplies 1.1A of output current with a 290mV

typical dropout voltage. Operating quiescent current is

500μA, reducing to <1μA in shutdown. Quiescent current

is well controlled; it does not rise in dropout as with many

other regulators. The LT1965 regulator has very low out-

put noise which makes it ideal for sensitive RF and DSP

supply applications.

Output voltage ranges from 1.20V to 19.5V. The LT1965

regulator is stable with output capacitors as low as 10μF.

Internal protection circuitry includes reverse battery pro-

tection, current limiting with foldback, thermal limiting

and reverse current protection. The LT1965 is available

as an adjustable device with a 1.20V reference voltage.

The package offering includes the 5-lead TO-220, 5-lead

DD-PAK as well as the thermally enhanced 8-lead MSOP

and 8-lead 3mm × 3mm DFN.

3.3V to 2.5V Regulator

■

Output Current: 1.1A

■

Dropout Voltage: 290mV

■

■

500μA Quiescent Current

■

Wide Input Voltage Range: 1.8V to 20V

■

No Protection Diodes Needed

■

Controlled Quiescent Current in Dropout

■

Adjustable Output from 1.20V to 19.5V

■

< 1μA Quiescent Current in Shutdown

■

Stable with 10μF Output Capacitor

■

Stable with Ceramic, Tantalum or Aluminum

Electrolytic Capacitors

■

Reverse Battery Protection

■

No Reverse Current

■

Current Limit with Foldback Protection

■

Thermal Limiting

■

5-Lead TO-220, DD-PAK, Thermally Enhanced 8-Lead

MSOP and 8-Lead 3mm × 3mm DFN Packages

■

Logic Power Supplies

■

Post Regulator for Switching Supplies

■

Low Noise Instrumentation

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

All other trademarks are the property of their respective owners.

Dropout Voltage

IN

SHDN

10μF*

*CERAMIC, TANTALUM OR

ALUMINUM ELECTROLYTIC

1965 TA01

OUT

TO 20V

ADJ

GND

LT1965

2.5V

1.1A

10μF*

+

+

5.11k

1%

4.75k

1%