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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

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 1: −40°C to +125°C, TA
  • Wide input range: Up to 35V
  • Rated output current: 100mA
  • Low dropout: 380mV (typ) at 100mA
  • Low quiescent current: 75µA (typ)
  • Tight line regulation: 0.03% (typ)
  • Tight load regulation: 0.04% (typ)
  • High VO accuracy:
    • 1% at 25°C
    • 2% over temperature
  • Can be used as a regulator or reference
  • Stable with low ESR (>12mΩ) capacitors
  • Current- and thermal-limiting features
  • 8-pin package:
    • Fixed voltages: 5V/ADJ and 3.3V/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 1: −40°C to +125°C, TA
  • Wide input range: Up to 35V
  • Rated output current: 100mA
  • Low dropout: 380mV (typ) at 100mA
  • Low quiescent current: 75µA (typ)
  • Tight line regulation: 0.03% (typ)
  • Tight load regulation: 0.04% (typ)
  • High VO accuracy:
    • 1% at 25°C
    • 2% over temperature
  • Can be used as a regulator or reference
  • Stable with low ESR (>12mΩ) capacitors
  • Current- and thermal-limiting features
  • 8-pin package:
    • Fixed voltages: 5V/ADJ and 3.3V/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 35V. 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 VTAP pins together, the LP2951-Q1 outputs a fixed 5V and 3.3V (depending on the version). Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235V to 30V.

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 (20ppm 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 100mA regulator.

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

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 (20ppm 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 100mA regulator.
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* Data sheet LP2951-Q1 Automotive, Adjustable Micropower Voltage Regulators With Shutdown datasheet (Rev. G) PDF | HTML 16 Apr 2024
Functional safety information LP2951-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML 27 Aug 2024
EVM User's guide LP2951 EVM User's Guide (Rev. A) 05 Jan 2018

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

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