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LT1175CT#PBF

ADILT1175CT#PBF

Analog Devices Inc.
Linear Voltage Regulator IC Negative Adjustable 1 Output 500mA TO-220-5
Active135 in stock
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Overview

The LT1175CT#PBF is a negative micropower low dropout (LDO) linear regulator capable of providing 500mA of output current. It features a unique architecture that remains stable with a wide range of output capacitors, including small ceramic units, while maintaining a very low 80uA quiescent current. The device is adjustable from -3.8V to -19.3V and includes a logic-level shutdown pin for power management.

Why Choose This Part

This regulator is highly versatile due to its stability with almost any output capacitor type, including ceramic, tantalum, or electrolytic. It offers robust protection with current limiting that is user-adjustable via an external resistor and includes thermal shutdown. Its low dropout voltage of 0.7V at 500mA allows for efficient operation even as input-to-output differentials shrink.

Applications

Operational Amplifier Supplies
Provides clean, low-noise negative rails for high-precision analog circuitry and bipolar op-amp stages.
Battery-Powered Instruments
The 80uA quiescent current and low dropout voltage of 0.7V at full load extend battery life in portable equipment.
Post-Regulator for Switching Supplies
Filters high-frequency switching noise from negative DC-DC converter outputs to provide ripple-free power.
Negative Bias Generation
Ideal for generating negative bias voltages for LCDs, GaAs FETs, and sensor interfaces.

Key Specifications

Output Type Adjustable
Mounting Type Through Hole
Package / Case TO-220-5
Control Features Current Limit, Enable
Current - Output 500mA
Number of Regulators 1
Output Configuration Negative
Operating Temperature 0degC ~ 125degC (TJ)
Voltage - Input (Max) -20V
Voltage Dropout (Max) 0.7V @ 500mA
Voltage - Output (Max) -19.3V
Supplier Device Package TO-220-5
Current - Quiescent (Iq) 80 uA
Voltage - Output (Min/Fixed) -3.8V

Getting Started

When designing with the LT1175CT#PBF, ensure the TO-220 package is appropriately heat-sinked if operating at high input-to-output voltage differentials and full 500mA current. Connect the SHDN pin to ground for normal operation or pull it positive to shut down the regulator. Use two external resistors to set the output voltage between -3.8V and -19.3V according to the formula in the datasheet.

Also Consider

LM337T TITexas Instruments - Industry-standard negative adjustable regulator for applications where higher quiescent current is acceptable.