TPS54719_15 datasheet(3/40 Pages) TI

No de pièce	TPS54719

Description	TPS54719 2.95 V To 6 V Input, 7-A Synchronous Step Down SWIFT??Converter

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PH

VIN

15

14

13

GND

12

11

10

9

8

7

6

5

16

GND

VIN

PH

1

2

3

4

SS/TR

PowerPAD

(17)

QFN16

RTE Package

(Top View)

TPS54719

www.ti.com

SLVSB69A – JUNE 2012 – REVISED JULY 2014

5 Pin Configuration and Functions

Table 1. Pin Functions

DESCRIPTION

NAME

NO.

AGND

5

Analog Ground should be electrically connected to GND close to the device.

BOOT

13

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

required by the BOOT UVLO, the output is forced to switch off until the capacitor is refreshed.

COMP

7

Error amplifier output, and input to the output switch current comparator. Connect frequency compensation

components to this pin.

EN

15

Enable pin, internal pull-up current source. Pull below 1.18 V to disable. Float to enable. Can be used to set the

on/off threshold (adjust UVLO) with two additional resistors.

GND

3, 4

Power Ground. This pin should be electrically connected directly to the power pad under the IC.

PH

10, 11,

The source of the internal high side power MOSFET, and drain of the internal low side (synchronous) rectifier

12

MOSFET.

PWRGD

14

An open drain output, asserts low if output voltage is low due to thermal shutdown, overcurrent, over/under-

voltage or EN shut down.

RT

8

Resistor Timing.

SS/TR

9

Slow-start. An external capacitor connected to this pin sets the output voltage rise time. This pin can also be used

for tracking.

Thermal

17

GND pin should be connected to the exposed power pad for proper operation. This thermal pad should be

Pad

connected to any internal PCB ground plane using multiple vias for good thermal performance.

VIN

1, 2, 16

Input supply voltage, 2.95 V to 6 V.

VSENSE

6

Inverting node of the transconductance (gm) error amplifier.

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