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Automotive 3.6V to 36V, 3.2A buck converter with auto-sourced 280mA LDO regulator

Availability: 4,031


Package | PIN: HTSSOP (PWP) | 14
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.02
10-24 $1.82
25-99 $1.69
100-249 $1.48
250-499 $1.39
500-749 $1.18
750-999 $1.00
1,000+ $0.95


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C AmbientOperating Temperature
    • Device HBM ESD Classification Level2
    • Device CDM ESD Classification LevelC4B
  • One High-VIN Step-Down DC-DC Converter
    • Input Range of 3.6 V to 36 V
    • 250-mΩ High-SideMOSFET
    • Maximum Load Current 3.2 A, Output Adjustable 1.1 V to 20V
    • Adjustable Switching Frequency 100 kHz to 2.5MHz
    • Synchronizes to External Clock
    • High Efficiency atLight Loads With Pulse-Skipping Eco-mode™ Control Scheme
    • Maximum 140-µAOperating Quiescent Current
  • One Low-Dropout Voltage (LDO) Regulator
    • Input Range of 3 V to 20 V, WithAuto-Source to Balance Efficiency and Lower Standby Current
    • 280-mA Current CapabilityWith Typical 35-µA Quiescent Current in No-LoadCondition
    • Power-Good Output (Push-Pull)
    • Low-Dropout Voltageof 300 mV at
      IO = 200 mA (Typical)
  • Overcurrent Protection for Both Regulators
  • Overtemperature Protection
  • 14-Pin HTSSOP Package With PowerPAD™ Integrated Circuit Package

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Texas Instruments  TPS65320DQPWPRQ1

The TPS65320D-Q1 device is a combination of a high-VIN DC-DC step-downconverter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHzto 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V forthe buck regulator, and 3 V to
36 V for the LDO regulator. The buck regulator has anintegrated high-side MOSFET. The LDO regulator features a low-inputsupply current of 45-µA typical in no-load, also has an integrated MOSFET with an active-low, push-pull reset outputpin. The input supply of the LDOregulator auto-source from the output of the buck regulator when it is in operation. Low-voltage tracking feature enables TPS65320D-Q1 to track the input supply duringcold-crank conditions.

The buck regulator provides a flexible design to fit system needs. The external loopcompensation circuit allows for optimization of the converter response for the appropriateoperating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current tomaximum 140 µA.

The device has built-in protection features such as soft start, current-limit, thermalsensing and shutdown due to excessive power dissipation. Furthermore, the device has an internalundervoltage-lockout (UVLO) function that turns off the device when the supply voltage is toolow.