LP2951: Linear Voltage Regulator, LDO, Low Power, 100 mA, with Error Flag Output

The LP2950 and LP2951 are micropower low dropout (LDO) linear voltage regulators that are specifically designed to maintain proper regulation with an extremely low input-to-output voltage differential. These devices feature a very low quiescent bias current of 75 µA and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided.The LP2951 LDO linear voltage regulator has three additional features. The first is the Errorbar Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor power-on reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 3.0 V output (depending on the version) or programmed from 1.25 V to 29 V. It consists of a pinned out resistor divider along with direct access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turn-off or turn-on the regulator output. Due to the low input-to-output voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension ofuseful battery life is desirable. The LP2950 is available in the three pin case 29 and DPAK packages, and the LP2951 is available in the eight pin dual-in-line, SO-8 and Micro-8 surface mount packages.The 'A' suffix devices feature an initial output voltage tolerance +/-0.5%.

Features
  • Low Quiescent Bias Current of 75 mA
  • Low Input-to-Output Voltage Differential of 50 mV at 100 mA and 380 mV at 100 mA
  • 5.0 V, 3.3 V or 3.0 V +/- 0.5% Allows Use as a Regulator or Reference
  • Extremely Tight Line and Load Regulation
  • Requires Only a 1.0 mF Output Capacitor for Stability
  • Internal Current and Thermal Limiting
  • LP2951 also has Error(bar) Output Signals an Out of Regulation Condition
  • LP2951 also has Output Programmable from 1.25 V to 29 V
  • LP2951 also has Logic Level Shutdown Input
  • Pb-Free Packages are Available
Applications
  • Automotive
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
100 mA, Low Power Low Dropout Voltage RegulatorLP2950/D (223kB)29Oct, 2016
Package Drawings (3)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
Micro 8 lead Surface Mount846A-02 (57.7kB)J
SOIC-8 Narrow Body751-07 (62.6kB)AK
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
LP2951ACD-3.0GActivePb-free Halide freeSOIC-8751-071Tube98$0.2867
LP2951ACD-3.0R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.2867
LP2951ACD-3.3GActivePb-free Halide freeSOIC-8751-071Tube98$0.2867
LP2951ACD-3.3R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.2867
LP2951ACDGActivePb-free Halide freeSOIC-8751-071Tube98$0.2867
LP2951ACDM-3.0RGActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.2933
LP2951ACDM-3.3RGActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.2933
LP2951ACDMR2GActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.2933
LP2951ACDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.2867
LP2951ACN-3.0GActivePb-free Halide freePDIP-8626-05NATube50$0.3333
LP2951ACN-3.3GActivePb-free Halide freePDIP-8626-05NATube50$0.2963
LP2951ACNGActivePb-free Halide freePDIP-8626-05NATube50$0.3333
LP2951CD-3.0GActivePb-free Halide freeSOIC-8751-071Tube98$0.28
LP2951CD-3.0R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.28
LP2951CD-3.3GActivePb-free Halide freeSOIC-8751-071Tube98$0.28
LP2951CD-3.3R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.1933
LP2951CDGActivePb-free Halide freeSOIC-8751-071Tube98$0.1933
LP2951CDM-3.0R2GActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.4573
LP2951CDM-3.3R2GActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.4573
LP2951CDMR2GActivePb-free Halide freeMicro8™846A-021Tape and Reel4000$0.4573
LP2951CDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.1933
LP2951CN-3.0GActivePb-free Halide freePDIP-8626-05NATube50Contact BDTIC
LP2951CN-3.3GActivePb-free Halide freePDIP-8626-05NATube50$0.3067
LP2951CNGActivePb-free Halide freePDIP-8626-05NATube50$0.3067
Specifications
ProductOutputPolarityVO (V)IO Typ (A)VI Max (V)VDO Typ (V)Iq Typ (mA)PSRR (dB)Noise (µVrms)
LP2951ACD-3.0GSinglePositive30.1300.350.0934856
LP2951ACD-3.0R2GSinglePositive30.1300.350.0934856
LP2951ACD-3.3GSinglePositive3.30.1300.350.0934856
LP2951ACD-3.3R2GSinglePositive3.30.1300.350.0934856
LP2951ACDGSinglePositiveAdjustable0.1300.350.0934856
LP2951ACDM-3.0RGSinglePositive30.1300.350.0934856
LP2951ACDM-3.3RGSinglePositive3.30.1300.350.0934856
LP2951ACDMR2GSinglePositiveAdjustable0.1300.350.0934856
LP2951ACDR2GSinglePositiveAdjustable0.1300.350.0934856
LP2951ACN-3.0GSinglePositive30.1300.350.0934856
LP2951ACN-3.3GSinglePositive3.30.1300.350.0934856
LP2951ACNGSinglePositiveAdjustable0.1300.350.0934856
LP2951CD-3.0GSinglePositive30.1300.350.0934856
LP2951CD-3.0R2GSinglePositive30.1300.350.0934856
LP2951CD-3.3GSinglePositiveAdjustable0.1300.350.0934856
LP2951CD-3.3R2GSinglePositive3.30.1300.350.0934856
LP2951CDGSinglePositiveAdjustable0.1300.350.0934856
LP2951CDM-3.0R2GSinglePositive30.1300.350.0934856
LP2951CDM-3.3R2GSinglePositive3.30.1300.350.0934856
LP2951CDMR2GSinglePositiveAdjustable0.1300.350.0934856
LP2951CDR2GSinglePositiveAdjustable0.1300.350.0934856
LP2951CN-3.0GSinglePositive30.1300.350.0934856
LP2951CN-3.3GSinglePositiveAdjustable0.1300.350.0934856
LP2951CNGSinglePositiveAdjustable0.1300.350.0934856
100 mA, Low Power Low Dropout Voltage Regulator (223kB) LP2951
Micro 8 lead Surface Mount CM1216
SOIC-8 Narrow Body CM1216
8 LEAD PDIP NE592