Datasheet

GND7

COMP6

FB5

SW8

VIN

RT/CLK

BOOT

Thermal

Pad

TPS54560

www.ti.com

SLVSBN0A –MARCH 2013–REVISED MARCH 2014

6 Terminal Configuration and Functions

HSOIC PACKAGE

(TOP VIEW)

Terminal Functions

TERMINAL

I/O DESCRIPTION

NAME NO.

A bootstrap capacitor is required between BOOT and SW. If the voltage on this capacitor is below the

BOOT 1 O minimum required to operate the high side MOSFET, the output is switched off until the capacitor is

refreshed.

VIN 2 I Input supply voltage with 4.5 V to 60 V operating range.

Enable terminal, with internal pull-up current source. Pull below 1.2 V to disable. Float to enable. Adjust the

EN 3 I

input undervoltage lockout with two resistors. See the Enable and Adjusting Undervoltage Lockout section.

Resistor Timing and External Clock. An internal amplifier holds this terminal at a fixed voltage when using an

external resistor to ground to set the switching frequency. If the terminal is pulled above the PLL upper

RT/CLK 4 I threshold, a mode change occurs and the terminal becomes a synchronization input. The internal amplifier is

disabled and the terminal is a high impedance clock input to the internal PLL. If clocking edges stop, the

internal amplifier is re-enabled and the operating mode returns to resistor frequency programming.

FB 5 I Inverting input of the transconductance (gm) error amplifier.

Error amplifier output and input to the output switch current (PWM) comparator. Connect frequency

COMP 6 O

compensation components to this terminal.

GND 7 – Ground

SW 8 I The source of the internal high-side power MOSFET and switching node of the converter.

GND terminal must be electrically connected to the exposed pad on the printed circuit board for proper

Thermal Pad 9 –

operation.

Product Folder Links: TPS54560