TPS53515

SLUSBN5A – AUGUST 2013 – REVISED DECEMBER 2013

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PIN DESCRIPTIONS (continued)

PIN

NAME

NO.

TRIP

25

I/O

sourced and sets the OCL trip voltage. See the Current Sense and Overcurrent Protection section for

detailed OCP setting.

VBST is the supply rail for the high-side gate driver (boost terminal). Connect the bootstrap capacitor

VBST

4

P

from this pin to the SW node. Internally connected to VREG via bootstrap PMOS switch.

VDD

19

P

Power-supply input pin for controller. Input of the VREG LDO. The input range is from 4.5 to 25 V.

15

VIN

16

P

VIN is the conversion power-supply input pins.

17

VREG

20

O

VREG is the 5-V LDO output. This voltage supplies the internal circuitry and gate driver.

VO

24

I

VOUT voltage input to the controller.

6

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