LT1964

1

1964fb

TYPICAL APPLICATION

DESCRIPTION

200mA, Low Noise,

Low Dropout Negative

Micropower Regulator

tive regulator. The device is capable of supplying 200mA

of output current with a dropout voltage of 340mV. Low

quiescent current (30μA operating and 3μA shutdown)

makes the LT1964 an excellent choice for battery-pow-

ered applications. Quiescent current is well controlled in

dropout.

Other features of the LT1964 include low output noise.

With the addition of an external 0.01μF bypass capacitor,

bandwidth. The LT1964 is capable of operating with small

capacitors and is stable with output capacitors as low

as 1μF. Small ceramic capacitors can be used without

the necessary addition of ESR as is common with other

regulators. Internal protection circuitry includes reverse

output protection, current limiting, and thermal limiting.

The device is available with a fixed output voltage of –5V

and as an adjustable device with a –1.22V reference volt-

age. The LT1964 regulators are available in a low profile

(1mm) ThinSOT and the low profile (0.75mm) 8-pin

(3mm

× 3mm) DFN packages.

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

a trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

FEATURES

APPLICATIONS

Capacitors

3mm

× 3mm DFN Packages

Instrumentation

Positive LDOs

–5V Low Noise Regulator

10Hz to 100kHz Output Noise

1964 TA01a

GND

SHDN

BYP

IN

OUT

LT1964-5

1μF

10μF

0.01μF

–5.4V

TO –20V

–5V AT 200mA

100μV/DIV

1ms/DIV

1964 TA01b