LT1964

`  Low Profile (1mm) ThinSOTTM Package
`  Low Noise: 30mVRMS (10Hz to 100kHz)
`  Low Quiescent Current: 30mA
`  Low Dropout Voltage: 340mV
`  Output Current: 200mA
`  Fixed Output Voltage: 5V
`  Adjustable Output from 1.22V to 20V
`  Positive or Negative Shutdown Logic
`  3mA Quiescent Current in Shutdown
`  Stable with 1mF Output Capacitor
`  Stable with Aluminum, Tantalum, or Ceramic Capacitors
`  Thermal Limiting

·  Low Current Regulator
·  Regulator for Battery-Powered Systems
·  Low Noise Regulator for Noise-Sensitive Instrumentation
·  Negative Complement to LT1761 Family of Positive LDOs

IN Pin Voltage ........................................................ ±20V
OUT Pin Voltage (Note 11) ..................................... ±20V
OUT to IN Differential Voltage (Note 11) ....... 0.5V, 20V
ADJ Pin Voltage
(with Respect to IN Pin) (Note 11) ................ 0.5V, 20V
BYP Pin Voltage
(with Respect to IN Pin) ......................................... ±20V
SHDN Pin Voltage
(with Respect to IN Pin) (Note 11) ................ 0.5V, 35V
SHDN Pin Voltage
(with Respect to GND Pin) .............................. 20V, 15V
Output Short-Circuit Duration ......................... Indefinite
Operating Junction Temperature
Range (Note 10) .................................... 40 to 125
Storage Temperature Range ................. 65 to 150
Lead Temperature (Soldering, 10 sec)................... 300

The LT®1964 is a micropower low noise low dropout negative regulator. The device is capable of supplying 200mA of output current with a dropout voltage of 340mV.

Low quiescent current (30mA operating and 3mA shutdown) makes the LT1964 an excellent choice for atterypowered applications. Quiescent current is well controlled in dropout.

Other features of the LT1964 include low output noise.

With the addition of an external 0.01mF bypass capacitor, output noise is reduced to 30mVRMS over a 10Hz to 00kHz bandwidth. The LT1964 is capable of operating with small capacitors and is stable with output capacitors as low as 1mF. 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 voltage. The LT1964 regulators are available in the a low profile (1mm) ThinSOT package.