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LP2951

Low Dropout Regulator

Status: In Production

Features:

  • High accuracy 5V, guaranteed 100 mA output
  • Extremely low quiescent current
  • Low-dropout voltage
  • Extremely tight load and line regulation
  • Very low temperature coefficient
  • Use as regulator or reference
  • Needs only 1µF for stability
  • Current and thermal limiting
  • LP2951 Versions Only
  • Error flag warns of output dropout
  • Logic-controlled electronic shutdown
  • Output programmable from 1.24V to 29V 
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The LP2950 and LP2951 are micropower voltage regulators with very low dropout voltage (typically 40mV at light loads and 380mV at 100mA), and very low quiescent current (75µA typical). The quiescent current of the LP2950/LP2951 increases only slightly in dropout, thus prolonging battery life. This feature, among others, makes the LP2950 and LP2951 ideally suited for use in battery-powered systems.

Available in a 3-pin TO-92 package, the LP2950 is pin-compatible with the older 5V regulators. Additional system functions, such as programmable output voltage and logic-controlled shutdown, are available in the 8-pin DIP and 8-pin SOIC versions of the LP2951.

Additional features available with the LP2951 also include an error flag output that warns of a low output voltage, which is often due to failing batteries on the input. This may also be used as a power-on reset. A logic-compatible shutdown input is also available which enables the regulator to be switched on and off. This part may also be pin-strapped for a 5V output, or programmed from 1.24V to 29V with the use of two external resistors.

The LP2950 is available as either an -02 or -03 version. The -02 and -03 versions are guaranteed for junction temperatures from -40°C to +125°C; the -02 version has a tighter output and reference voltage specification range over temperature. The LP2951 is available as an -02 or -03 version.

The LP2950 and LP2951 both have a tight initial tolerance (0.5% typical), a very low output voltage temperature coefficient, which allows use as a low-power voltage reference, and extremely good load and line regulation (0.05% typical). This greatly reduces the error in the overall circuit and is the result of careful design techniques and process controls.

Additional Features
    • High accuracy 5V, guaranteed 100 mA output
    • Extremely low quiescent current
    • Low-dropout voltage
    • Extremely tight load and line regulation
    • Very low temperature coefficient
    • Use as regulator or reference
    • Needs only 1µF for stability
    • Current and thermal limiting
    • LP2951 Versions Only
    • Error flag warns of output dropout
    • Logic-controlled electronic shutdown
    • Output programmable from 1.24V to 29V 
Parametrics
Name
Value
Product Type
Single LDOs
# of Out
1
IOUT #1
100
IOUT #2
n/a
IOUT #3
n/a
IOUT #4
n/a
IOUT (mA)
100
VIN Min (V)
2
VIN Max (V)
30
VOUT (V)
4.8, 5.0, Adj
Voltage Drop Typ (mV)
380
IGND Typ (µA)
100
Tol Typ %
±0.5
Noise (µV) rms
100
PSRR 1 kHz (dB)
70
Soft Start Pin
Load Dump
Rev Bat
Reverse Current Protect

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
LP2951-02YM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
LP2951-03YM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
LP2951-02YM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
LP2951-03YM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
LP2951-02YN
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
LP2951-03YN
0.486700
0.900000
8
PDIP
.300in
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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