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Texas Instruments TPS7B4259-Q1 Low-Dropout (LDO) Regulator

Texas Instruments TPS7B4259-Q1 Low-Dropout (LDO) Regulator is an automotive, 150mA, 40V voltage-tracking regulator with independent enable and power good. This device is a monolithic, integrated LDO voltage tracker designed to reliably provide power to off-board sensors with a wire harness, even in harsh automotive environments. The TPS7B4259-Q1 comes with integrated protection features against fault conditions and protection against reverse polarity. This device features a topology consisting of two back-to-back P-channel MOSFETs. The TPS7B4259-Q1 regulator device is designed to handle a 45V (absolute maximum) input voltage and survive the automotive load dump transient conditions. This LDO regulator provides a protective buffer for the ADC and MCU against fault conditions, while securely transferring power to the off-board sensors. The TPS7B4259-Q1 regulator is available in the HSOIC (DDA) low thermal resistance (RθJA = 48°C/W) 8-pin package. This regulator is ideal for powertrain pressure sensors, powertrain temperature sensors, powertrain exhaust sensors, powertrain fluid concentration sensors, Body Control Modules (BCM), zone control module, and HVAC control modules.

Features

  • AEC-Q100 qualified for automotive applications:
    • -40°C to 125°C, TA temperature grade 1
    • -40°C to 150°C, TJ junction temperature
  • Wide input voltage range:
    • -40V to 45V absolute maximum range
    • 3.3V to 40V operating range 
  • Output voltage:
    • 2V to 40V wide operating range
    • Output voltage flexibility scale VOUT to values that are higher or lower than the reference using external resistors in a voltage divider configuration
  • 150mA (maximum) output current
  • 6mV (maximum) very tight output-tracking tolerance
  • 250mV at 150mA, low dropout voltage
  • Combined enable and reference functionalities
  • 55μA low quiescent current at light load
  • Stable over a wide range of ceramic output capacitor values:
    • 1μF to 100μF COUT range
    • 1mΩ to 2Ω ESR range
  • Integrated protection features:
    • Reverse current protection
    • Reverse polarity protection
    • Overtemperature protection
    • Protection against output short circuit to ground and supply
  • Available in the HSOIC (DDA) low thermal resistance (RθJA = 48°C/W) 8-pin package

Applications

  • Powertrain pressure sensors
  • Powertrain temperature sensors
  • Powertrain exhaust sensors
  • Powertrain fluid concentration sensors
  • Body Control Modules (BCM)
  • Zone Control Modules (ZCM)
  • HVAC control modules

Typical Application

Application Circuit Diagram - Texas Instruments TPS7B4259-Q1 Low-Dropout (LDO) Regulator

Block Diagram

Block Diagram - Texas Instruments TPS7B4259-Q1 Low-Dropout (LDO) Regulator

Low-Dropout (LDO) Regulator

Texas Instruments TPS7B4258-Q1 Low-Dropout (LDO) Regulator

Provides power to off-board sensors via a wire harness, even in a harsh automotive environment.

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Publicado: 2025-10-07 | Actualizado: 2025-10-29