LP2951-Q1

ACTIVE

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

Product details

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2 Vout (max) (V) 29 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5 Noise (µVrms) 430 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 56, 122 TI functional safety category Functional Safety-Capable Rating Automotive Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 PSRR at 100 KHz (dB) 54 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2 Vout (max) (V) 29 Vout (min) (V) 3.3 Fixed output options (V) 3.3, 5 Noise (µVrms) 430 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 56, 122 TI functional safety category Functional Safety-Capable Rating Automotive Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 PSRR at 100 KHz (dB) 54 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 x: y°C to z°C, T A
  • Wide input range: Up to 35 V
  • Rated output current: 100 mA
  • Low dropout: 380 mV (typ) at 100 mA
  • Low quiescent current: 75 µA (typ)
  • Tight line regulation: 0.03% (typ)
  • Tight load regulation: 0.04% (typ)
  • High V O accuracy:
    • 1% at 25°C
    • 2% over temperature
  • Can be used as a regulator or reference
  • Stable with low ESR (>12 mΩ) capacitors
  • Current- and thermal-limiting features
  • 8-pin package:
    • Fixed voltages: 5 V/ADJ and 3.3 V/ADJ
    • Low-voltage error signal on falling output
    • Shutdown capability
    • Remote sense capability for optimal output regulation and accuracy
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade x: y°C to z°C, T A
  • Wide input range: Up to 35 V
  • Rated output current: 100 mA
  • Low dropout: 380 mV (typ) at 100 mA
  • Low quiescent current: 75 µA (typ)
  • Tight line regulation: 0.03% (typ)
  • Tight load regulation: 0.04% (typ)
  • High V O accuracy:
    • 1% at 25°C
    • 2% over temperature
  • Can be used as a regulator or reference
  • Stable with low ESR (>12 mΩ) capacitors
  • Current- and thermal-limiting features
  • 8-pin package:
    • Fixed voltages: 5 V/ADJ and 3.3 V/ADJ
    • Low-voltage error signal on falling output
    • Shutdown capability
    • Remote sense capability for optimal output regulation and accuracy

The LP2951-Q1 is a bipolar, low-dropout voltage regulator that can accommodate a wide input supply-voltage range of up to 35 V. The 8-pin 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 V TAP pins together, the LP2951-Q1 outputs a fixed 5 V and 3.3 V (depending on the version). Alternatively, by leaving the SENSE and V TAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.

The LP2951-Q1 device is designed to minimize all error contributions to the output voltage. With a tight output tolerance (0.5% at 25°C), a very low output voltage temperature coefficient (20 ppm typical), extremely good line and load regulation (0.3% and 0.4% typical), and remote sensing capability, the device can be used as either a low-power voltage reference or a 100-mA regulator.

The LP2951-Q1 is a bipolar, low-dropout voltage regulator that can accommodate a wide input supply-voltage range of up to 35 V. The 8-pin 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 V TAP pins together, the LP2951-Q1 outputs a fixed 5 V and 3.3 V (depending on the version). Alternatively, by leaving the SENSE and V TAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.

The LP2951-Q1 device is designed to minimize all error contributions to the output voltage. With a tight output tolerance (0.5% at 25°C), a very low output voltage temperature coefficient (20 ppm typical), extremely good line and load regulation (0.3% and 0.4% typical), and remote sensing capability, the device can be used as either a low-power voltage reference or a 100-mA regulator.

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Technical documentation

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Type Title Date
* Data sheet LP2951-Q1 Automotive, Adjustable Micropower Voltage Regulators With Shutdown datasheet (Rev. F) PDF | HTML 29 Aug 2023
Functional safety information LP2951-Q1 Functional Safety FIT Rate and Failure Mode Distribution 16 Dec 2019
EVM User's guide LP2951 EVM User's Guide (Rev. A) 05 Jan 2018

Design & development

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Simulation model

LP2951-50 PSpice Transient Model

SLVMA10.ZIP (24 KB) - PSpice Model
Package Pins Download
SOIC (D) 8 View options
WSON (DRG) 8 View options

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