LP2950: Linear Voltage Regulator, LDO, Low Power, 100 mA

Description: The LP2950 and LP2951 are micropower low dropout (...

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

Technical Documentation & Design Resources

• Collateral Brochure (1)
• Data Sheets (1)
• Package Drawings (2)

Product Change Notification

• DPAK Package Case Outline Standardization to match JEDEC and Industry

  PRODUCT BULLETIN

• 2008 (Second Half 2008) Leaded Parts to Lead Free Parts Standard Conversion EOL &

  PRODUCT DISCONTINUANCE

• Move of IC T092 Assembly and Test to Dalian, China

  FINAL PRODUCT/PROCESS CHANGE NOTIFICATION

• H1 2008 (First Half 2008) Leaded Parts to Lead Free Parts standard conversion EOL

  PRODUCT DISCONTINUANCE

• Move of IC T092 Assembly and Test to Dalian, China

  INITIAL PRODUCT/PROCESS CHANGE NOTIFICATION

• H2 2007 (Second HALF 2007) Leaded Parts to Lead Free Parts standard conversion EOL

  PRODUCT DISCONTINUANCE

• DPAK Package Mold Compound Change – Analog

  FINAL PRODUCT/PROCESS CHANGE NOTIFICATION

• DPAK Package Mold Compound Change

  INITIAL PRODUCT/PROCESS CHANGE NOTIFICATION

• H1 2007 (First HALF 2007) Leaded Parts to Lead Free Parts standard conversion EOL

  PRODUCT DISCONTINUANCE

• Pb-free Conversion - Backward Compatibility

  GENERAL ANNOUNCEMENT

• Final Notification to IPCN 11528- Motorola BMC to Tesla: LP2950, LP2951 and MC79XXA

  FINAL PRODUCT/PROCESS CHANGE NOTIFICATION

• 3ld Dpak Single Gauge Leadframe Qual at Internal and External

  FINAL PRODUCT/PROCESS CHANGE NOTIFICATION

• Initial Notification for Transfer of Analog Devices from Motorola BMC to Tesla

  INITIAL PRODUCT/PROCESS CHANGE NOTIFICATION

• Update Notification for PCNs 4813 and 10041

  UPDATE NOTIFICATION

• Transfer from BMC/BP4 to Tesla of Analog Devices

  UPDATE NOTIFICATION

• Transfer from BMC/BP4 to Tesla of Analog Devices

  PRODUCT/PROCESS CHANGE NOTIFICATION

• Addendum to PCN#4396:Assembly/Test Site Change to Seremban, Malaysia

  PRODUCT BULLETIN

• Analog IC DPACK Assembly/Site Qualification for PSI Phillipines

  PRODUCT/PROCESS CHANGE NOTIFICATION

• Assembly/Test Site Change to Seremban, Malaysia

  PRODUCT/PROCESS CHANGE NOTIFICATION

Availability and Samples

Packages

Specifications

Output: Single 

Polarity: Positive 

V_O (V): 3  3.3  5 

I_O Typ (A): 0.1 

V_I Min (V): 3.1 

V_I Max (V): 30 

V_DO Typ (V): 0.35 

I_q Typ (mA): 0.093 

PSRR (dB): 48 

Noise (µV_rms): 56 

Enable: No 

PowerGood: No 

Package Type: DPAK-3  TO-92