See datasheet for actual packaging/pinout drawings


Package | PIN:

PWP | 14


Q (-40 to 125)

ECO Plan:

Green (RoHS & no Sb/Br)


Automotive 3.6V to 36V, 3.2A Buck Converter with Wide Vin 280mA LDO Regulator

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500 - 749 $ 2.26
750 - 999 $ 1.90
1000 - 9999 $ 1.60

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Texas Instruments TPS65321QPWPRQ1

The TPS65321-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6-V to 36-V for the buck regulator, and 3-V to 36-V for the LDO regulator. The buck regulator has an integrated high-side MOSFET and an active-low, open-drain power-good output-pin (nRST). The LDO regulator also has an integrated MOSFET and features a low-input supply current of 35-μA typical in no-load condition. The low-voltage tracking feature enables the TPS65321-Q1 device to track the input supply during cold-crank conditions.

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

The device has built-in protection features such as soft start, current-limit, thermal sensing, and shutdown because of excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.

For all available packages, see the orderable addendum at the end of the datasheet. View datasheet
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