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LD1117-ADJ

LD1117-ADJ

STMicroelectronics
Another popular SMD adjustable regulator family with similar application space and wide distributor availability.
Active1,570 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LD1117-ADJ is a widely used adjustable low dropout (LDO) linear voltage regulator. It offers current limiting and thermal shutdown features for robust operation. This regulator is suitable for a variety of general-purpose power regulation tasks requiring up to 1A output current.

Why Choose This Part

This regulator offers an adjustable output from 1.25V to 10V, allowing flexibility for various designs. Its 1A output current capability supports moderate power loads. The integrated thermal shutdown and current limiting protect the device from adverse operating conditions.

Applications

Laptop, Palmtop, and Notebook Computers
Providing stable power rails for various subsystems within portable computing devices.
Battery Charger
Regulating voltage for battery charging circuits.
Cellular Phone and Cordless Telephones
Delivering regulated power for communication circuits and other functions in portable phones.
Battery Powered Systems
Efficiently regulating voltage from battery sources for diverse portable electronics.
Portable Instrumentation
Ensuring stable voltage supply for sensitive measurement and control equipment.
SMPS Post-Regulator
Cleaning up and fine-tuning the output voltage from switching mode power supplies.

Key Specifications

PSRR 75dB (120Hz)
Output Type Adjustable
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Control Features Current Limit
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Input (Max) 12V
Voltage Dropout (Max) 1.3V @ 1A
Voltage - Output (Max) 10.7V
Supplier Device Package SOT-223-3L
Current - Quiescent (Iq) 10 mA
Voltage - Output (Min/Fixed) 1.25V

Getting Started

To get started with the LD1117-ADJ, you will need to design an external resistor divider to set the desired output voltage. Refer to the datasheet for typical application circuits and component selection guidelines. Due to its common SOT-223-3L package, it can be easily integrated into custom PCB designs.

Part of 1117 Regulators family » LD1117

LD1117 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Output V Output I PSRR Output Type Temp Range Stock
LD1117-ADJ (this part) 4-261 1.25V — 120Hz Adjustable -40degC ~ 125degC .. 1,570
LD1117AS12TR Tape & Reel 4-261 1.2V 1A 120Hz Fixed 0degC ~ 125degC 57,161
LD1117DT18TR Tape & Reel 3-252 1.8V 800mA 120Hz Fixed 0degC ~ 125degC 6,765
LD1117AS18TR Tape & Reel 4-261 1.8V 1A 120Hz Fixed 0degC ~ 125degC 4,079

Also Consider

AMS1117-ADJ Advanced Monolithic Systems - A cost-effective and widely available alternative often found in consumer electronics, providing similar functionality.