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Texas Instruments LP2951-Q1 Low-Dropout (LDO) Voltage Regulators

Texas Instruments LP2951-Q1 Low-Dropout (LDO) Voltage Regulators are designed to accommodate a wide input supply voltage range of up to 30V. These regulators can deliver either a fixed or adjustable output from the same device. The LP2951-Q1 regulators include an error flag output that monitors the voltage at the feedback pin to indicate the status of the output voltage. These regulators consist of integrated thermal shutdown, current limit, and Undervoltage Lockout (UVLO) functions. The LP2951-Q1 regulators are AEC-Q100 qualified for automotive applications.

The LP2951-Q1 regulators feature a 1% output tolerance across line, load, and temperature variation (new chip). These regulators operate within the -40°C to 125°C temperature range and are stable with small ceramic output capacitors. The LP2951-Q1 regulators are used in infotainment, clusters, HEV/EV DC-DC converters, HEV/EV motor controls, and HEV/EV Battery Management Systems (BMSs).

Features

  • 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 output voltage range VOUT:
    • 3.3V and 5V at a fixed option
    • 1.2V to 29V at the adjustable option
  • VOUT accuracy:
    • ±2% over line, load, and temperature for legacy chip
    • ±1% over line, load, and temperature for new chip
  • Stable over a wide range of ceramic output capacitor values:
    • 1μF to 100μF CL range (new chip)
    • 0Ω to 2Ω ESR range (new chip)
  • 2V to 30V VIN range (new chip)
  • Deliver up to 100mA of load current
  • 50μA (typical) quiescent current IQ (new chip)
  • 340mV (typical) low drop out for new chip
  • Open-drain error output
  • Output current limiting and thermal shutdown

Applications

  • Infotainment and clusters
  • HEV/EV DC-DC converters
  • HEV/EV Onboard Chargers (OBC) and wireless chargers
  • HEV/EV inverters and motor controls
  • HEV/EV Battery Management Systems (BMSs)

Related Module

Texas Instruments LP2951EVM LDO Regulator Evaluation Module (EVM)

Helps evaluate the operation and performance of the LP2951 bipolar LDO voltage regulators.

Learn Moreabout Texas Instruments LP2951EVM LDO Regulator Evaluation Module (EVM) View Productsrelated to Texas Instruments LP2951EVM LDO Regulator Evaluation Module (EVM)

Functional Block Diagram

Block Diagram - Texas Instruments LP2951-Q1 Low-Dropout (LDO) Voltage Regulators

Application Circuit Diagram

Application Circuit Diagram - Texas Instruments LP2951-Q1 Low-Dropout (LDO) Voltage Regulators
Published: 2025-01-20 | Updated: 2025-03-05