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AMS1117-ADJ

DIOAMS1117-ADJ

Diodes Incorporated
Common SMD adjustable linear regulator that offers higher continuous current capability in a small footprint, useful when a surface-mount part with greater current is needed.
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Overview

The AMS1117-ADJ is a widely used adjustable linear voltage regulator from Diodes Incorporated, capable of supplying up to 1A of continuous output current. It is designed for surface-mount applications where a stable, regulated power source is needed with moderate current requirements. Its adjustable output makes it versatile for various voltage conversion tasks.

Why Choose This Part

This regulator offers up to 1A output current, providing sufficient power for many common embedded system needs. Its adjustable output voltage from 1.25V to 10V with 1.5% accuracy allows for flexible design. Integrated current limiting and thermal shutdown features enhance reliability and protect the device from adverse operating conditions.

Applications

Laptop, Palmtop, and Notebook Computers
Provides regulated power for internal circuits, managing voltage requirements efficiently.
Battery Charger Circuits
Can be used to provide a stable voltage source for charging circuits in portable devices.
SCSI-II Active Terminator
Supplies stable voltage rails required for active termination in SCSI-II bus systems.
Cellular Phone Power Management
Regulates power for specific sub-systems within cellular phones, ensuring stable operation.
Portable Instrumentation
Delivers a consistent and adjustable power supply for various components in battery-powered test and measurement equipment.
SMPS Post-Regulator
Used after a switching mode power supply to further smooth and regulate the output voltage, improving power quality.

Key Specifications

PSRR 70dB (120Hz)
Output Type Adjustable
Current - Output 1A
Protection Features Over Temperature
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Input (Max) 18V
Voltage Dropout (Max) 1.4V @ 1A
Voltage - Output (Max) 30V
Current - Quiescent (Iq) 10 mA
Voltage - Output (Min/Fixed) 1.25V

Getting Started

To get started with the AMS1117-ADJ, connect the input voltage (up to 12V) and use a resistor divider network on the adjust pin to set the desired output voltage. The datasheet provides standard application circuits for calculating resistor values. No specific development board or complex toolchain is typically required, as it is a fundamental power management component.

Also Consider

LM317 TITexas Instruments - This is another ubiquitous adjustable linear regulator with similar functionality, often available in different package options including through-hole.
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