REG1117-3.3/2K5集成电路（IC）的线性+开关稳压器规格书PDF中文资料

REG1117-3.3/2K5属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的REG1117-3.3/2K5稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

FEATURES

FIXED AND ADJUSTABLE VERSIONS

2.85V MODEL FOR SCSI-2 ACTIVE

TERMINATION

OUTPUT CURRENT:

REG1117: 800mA max

REG1117A: 1A max

OUTPUT TOLERANCE:
1% max

DROPOUT VOLTAGE:

REG1117: 1.2V max at IO = 800mA

REG1117A: 1.3V max at IO = 1A

INTERNAL CURRENT LIMIT

THERMAL OVERLOAD PROTECTION

SOT-223 AND DDPAK SURFACE-MOUNT

PACKAGES

APPLICATIONS

SCSI-2 ACTIVE TERMINATION

HAND-HELD DATA COLLECTION DEVICES

HIGH EFFICIENCY LINEAR REGULATORS

BATTERY-POWERED INSTRUMENTATION

BATTERY MANAGEMENT CIRCUITS FOR

NOTEBOOK AND PALMTOP PCs

CORE VOLTAGE SUPPLY: FPGA, PLD, DSP,

CPU

DESCRIPTION

The REG1117 is a family of easy-to-use three-terminal

voltage regulators. The family includes a variety of fixedand

adjustable-voltage versions, two currents (800mA and

1A) and two package types (SOT-223 and DDPAK). See

the chart below for available options.

Output voltage of the adjustable versions is set with two

external resistors. The REG1117 low dropout voltage

allows its use with as little as 1V input-output voltage

differential.

Laser trimming assures excellent output voltage accuracy

without adjustment. An NPN output stage allows output

stage drive to contribute to the load current for maximum

efficiency.