AMS1117 3.3 5.0 说明书

Advanced AMS1117 Monolithic 1A LOW DROPOUT VOLTAGE REGULATOR

Systems

RoHS compliantAPPLICATIONS

High Efficiency Linear Regulators

Post Regulators for Switching Supplies 5V to 3.3V Linear Regulator Battery Chargers

Active SCSI Terminators

Power Management for Notebook Battery Powered Instrumentation

FEATURES

Three Terminal Adjustable or Fixed Voltages* 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V Output Current of 1A

Operates Down to 1V Dropout Line Regulation: 0.2% Max. Load Regulation: 0.4% Max.

SOT-223, TO-252 and SO-8 package available

GENERAL DESCRIPTION

The AMS1117 series of adjustable and fixed voltage regulators are designed to provide 1A output current and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V at maximum output current, decreasing at lower load currents.

On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload conditions on both the regulator and power source circuitry.

The AMS1117 devices are pin compatible with other three-terminal SCSI regulators and are offered in the low profile surface mount SOT-223 package, in the 8L SOIC package and in the TO-252 (DPAK) plastic package.

ORDERING INFORMATION:

PACKAGE TYPE

OPERATING JUNCTION

8L TEMPERATURE RANGE AMS1117CS -40 to 125° C AMS1117CS-1.5 -40 to 125° C AMS1117CS-1.8 -40 to 125° C AMS1117CS-2.5 -40 to 125° C AMS1117CS-2.85 -40 to 125° C AMS1117CS-3.3 -40 to 125° C AMS1117CS-5.0 -40 to 125° C *For additional available fixed voltages contact factory.

PIN CONNECTIONS

3 PIN FIXED/ADJUSTABLE VERSION

1- Ground/Adjust 2- VOUT3- VIN

SOT-223 Top View