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LP2954A Datasheet 5V and Adjustable Micropower Low-Dropout Voltage Regulators

Manufacturer: National Semiconductor (now Texas Instruments)

General Description

The LP2954 is a 5V micropower voltage regulator with very low quiescent current (90 µA typical at 1 mA load) and very low dropout voltage (typically 60 mV at light loads and 470 mV at 250 mA load current).

The quiescent current increases only slightly at dropout (120 µA typical), which prolongs battery life.

The LP2954 with a fixed 5V output is available in the three-lead TO-220 and TO-263 packages.

Overview

LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators June 1999 LP2954/LP2954A 5V and Adjustable Micropower Low-Dropout Voltage.

Key Features

  • n 5V output within 1.2% over temperature (A grade) n Adjustable 1.23 to 29V output voltage available (LP2954IM and LP2954AIM) n Guaranteed 250 mA output current n Extremely low quiescent current n Low dropout voltage n Reverse battery protection n Extremely tight line and load regulation n Very low temperature coefficient n Current and thermal limiting n Pin compatible with LM2940 and LM340 (5V version only) n Adjustable version adds error flag to warn of output drop and a logic-controlled shutd.