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LP2951-Q1

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Automotive 100mA 30V low-dropout voltage regulator with power good and enable

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Data sheet

LP2951-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Vin (max) (V) 30 Vin (min) (V) 2 Iout (max) (A) 0.1 Output options Adjustable Output, Fixed Output Vout (max) (V) 29 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5 Noise (µVrms) 430 PSRR at 100 KHz (dB) 54 Iq (typ) (mA) 0.075 Features Enable, Power good Thermal resistance θJA (°C/W) 56, 122 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 30 Vin (min) (V) 2 Iout (max) (A) 0.1 Output options Adjustable Output, Fixed Output Vout (max) (V) 29 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5 Noise (µVrms) 430 PSRR at 100 KHz (dB) 54 Iq (typ) (mA) 0.075 Features Enable, Power good Thermal resistance θJA (°C/W) 56, 122 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DRG) 8 9 mm² 3 x 3
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
    • Temperature grade 1: −40°C to +125°C, TJ
  • Wide input voltage range
    • VIN range (new chip): 2V to 30V
  • Wide output voltage range VOUT
    • Fixed option: 3.3V, 5.0V
    • Adjustable option: 1.2V to 29V
  • Output current: Up to 100mA
  • VOUT accuracy:
    • ±2% over line, load, and temperature for legacy chip
    • ±1% over line, load, and temperature for new chip
  • Quiescent current IQ (new chip): 50µA (typical)
  • Low dropout: 340mV (typical) for new chip
  • Output current limiting and thermal shutdown
  • Open-drain error output
  • Stable over a wide range of ceramic output capacitor values:
    • CL range: 1µF to 100µF (new chip)
    • ESR range: 0Ω to 2Ω (new chip)
  • Package options:
    • D (8-pin SOIC)
    • DRG (8-pin WSON)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
    • Temperature grade 1: −40°C to +125°C, TJ
  • Wide input voltage range
    • VIN range (new chip): 2V to 30V
  • Wide output voltage range VOUT
    • Fixed option: 3.3V, 5.0V
    • Adjustable option: 1.2V to 29V
  • Output current: Up to 100mA
  • VOUT accuracy:
    • ±2% over line, load, and temperature for legacy chip
    • ±1% over line, load, and temperature for new chip
  • Quiescent current IQ (new chip): 50µA (typical)
  • Low dropout: 340mV (typical) for new chip
  • Output current limiting and thermal shutdown
  • Open-drain error output
  • Stable over a wide range of ceramic output capacitor values:
    • CL range: 1µF to 100µF (new chip)
    • ESR range: 0Ω to 2Ω (new chip)
  • Package options:
    • D (8-pin SOIC)
    • DRG (8-pin WSON)

The LP2951-Q1 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The LP2951-Q1 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951-Q1 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output are used for sequencing multiple power supplies in the system.

The LP2951-Q1 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The LP2951-Q1 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951-Q1 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output are used for sequencing multiple power supplies in the system.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LP2951-Q1 Automotive, Adjustable Micropower Voltage Regulator With Shutdown datasheet (Rev. I) PDF | HTML 04 Nov 2025
Application note An empirical analysis of the impact of board layout on LDO thermal performance (Rev. A) PDF | HTML 23 Sep 2025
Functional safety information LP2951-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. B) PDF | HTML 07 Nov 2024
Application note A Topical Index of TI LDO Application Notes (Rev. F) 27 Jun 2019
E-book LDO Basics (Rev. A) 08 Apr 2019
Technical article LDO basics: dropout PDF | HTML 16 Mar 2017

Design & development

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Evaluation board

LP2951EVM — LP2951 Fixed/Adjustable Micropower Low-Dropout (LDO) Regulator Evaluation Module

The LP2951 devices are bipolar low-dropout (LDO) voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V with an output load up to 100 mA. The LP2951EVM allows for flexibility in design, allowing the user to add or remove input and output capacitors, as well as (...)
User guide: PDF
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Simulation model

LP2951-50 PSpice Transient Model

SLVMA10.ZIP (24 KB) - PSpice Model
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SOIC (D) 8 Ultra Librarian
WSON (DRG) 8 Ultra Librarian
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