ILIM

TPS543C20

RAMP

RT

RSP

RSN

SW

BP

VSEL

SS

MODE

AGND

PGND

GND

BOOT

+

LOAD

t

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS543C20

SLUSCD4 – MARCH 2017

TPS543C20 4 Vin to 16 Vin, 40-A Stackable, Synchronous Step-down SWIFT™ Converter

with Adaptive Internal Compensation

1

1 Features

1

•

Internally-compensated Advanced Current Mode

Control 40A POL

•

Input Voltage Range: 4.0-V to 16.0-V

•

Output Voltage Range: 0.6-V to 5.5-V

•

Integrated 3.0/0.9-mΩ Stacked NexFET™ Power

Stage with lossless Low-Side current sensing

•

Fixed Frequency - Synchronization to an External

Clock and/ or Sync Out

•

Pin Strapping Programmable Switching Frequency

–

300 kHz to 2 MHz for Standalone

–

300 kHz to 1 Mhz for Stackable

•

Stack 2X for up to 80A with Current share,

Voltage share, and CLK Sync

•

Pin Strapping Programmable Reference from 0.6

V to 1.1 V with 0.5% Accuracy

•

Differential Remote Sensing

•

Safe Start-Up into Pre-Biased Output

•

High accuracy Hiccup Current Limit

•

Asynchronous Pulse Injection (API) and Body

Braking

•

40-pin, 5-mm × 7-mm LQFN Package with 0.5-

mm Pitch and Single Thermal Pad

•

Create a Custom Design Using the TPS543C20

With the WEBENCH® Power Designer

2 Applications

•

Wireless and Wired Communications

Infrastructure equipment

•

Enterprise Servers, Switches, and Routers

•

Enterprise Storage, SSD

•

ASIC, SoC, FPGA, DSP Core and I/O Rails

3 Description

The TPS543C20 employs an internally compensated

emulated peak current mode control, with a clock

synchronizable, fixed frequency modulator for EMI-

sensitive POL. The internal integrator and directly

amplifying ramp tracking loop eliminate the need for

external

compensation

over

a

wide

range

of

frequencies thereby making the system Design

flexible, dense, and simple. Optional API and Body

Braking

help

improve

transient

performance

by

significantly reducing undershoot and overshoot,

respectively. Integrated NexFET™ MOSFETs with

low-loss switching facilitate high efficiency and deliver

up to 40 A in a 5 mm x 7 mm PowerStack™ package

with a layout friendly thermal pad. Two TPS543C20

devices can be stacked together to provide up to 80-

A point-of-load.

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS543C20

RVF (40)

5.00 mm × 7.00

1. For all available packages, see the orderable

addendum at the end of the data sheet.

4 Simplified Schematic