LP2954 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – 5V and Adjustable Micropower Low-Dropout Voltage Regulators

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LP2954, LP2954A
SNVS096E – JUNE 1999 – REVISED JULY 2016
LP2954, LP2954A 5-V and Adjustable Micropower LDOs
1 Features
•1 5-V Output within 1.2% Over Temperature
(A Grade)
• Adjustable 1.23-V to 29-V Output Voltage
Available (LP2954IM and LP2954AIM)
• Ensured 250-mA Output Current
• Extremely Low Quiescent Current
• Low Dropout Voltage
• Reverse Battery Protection
• Extremely Tight Line and Load Regulation
• Very Low Temperature Coefficient
• Current and Thermal Limiting
• Pin Compatible with LM2940 and LM340
(5-V Version Only)
• Adjustable Version Adds ERROR Flag to Warn of
Output Drop and a Logic-Controlled Shutdown
2 Applications
• High-Efficiency Linear Regulator
• Low Dropout Battery-Powered Regulator
3 Description
The LP2954 is a 5-V micropower LDO 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 5-V output is available in
three-pin TO-220 and DDPAK/TO-263 packages. The
adjustable LP2954 is provided in an 8-pin, small-
outline SOIC package. The adjustable version also
provides a resistor network which can be pin
strapped to set the output to any voltage from to
1.23 V to 29 V.
Reverse battery protection is provided for the IN pin.
The tight line and load regulation (0.04% typical), as
well as very low output temperature coefficient make
the LP2954 well suited for use as a low-power
voltage reference.
Output accuracy is ensured at both room temperature
and over the entire operating temperature range.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.91 mm
LP2954
DDPAK/TO-263 (3) 10.18 mm × 8.41 mm
TO-220 (3)
14.986 mm × 10.16 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
V_IN
IN
OUT
V_OUT
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.