1 Features

1• Internally-Compensated Advanced Current Mode

Control 40-A POL

• Input Voltage Range: 4 V to 16 V

• Output Voltage Range: 0.6 V to 5.5 V

• Integrated 3.4/0.9-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 2× for up to 80 A With Current Share,

Voltage Share, and CLK Sync

• Pin Strapping Programmable Reference from 0.6V

to 1.1 V With 0.5% Accuracy

• Differential Remote Sensing

• Safe Start-Up into Prebiased 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 TPS543C20A

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 TPS543C20A uses an internally compensated

emulated peak-current-mode control, with a clock

synchronizable, fixed-frequency modulator for EMIsensitive

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 × 7-mm PowerStack™ package

with a layout friendly thermal pad. Two TPS543C20A

devices can be stacked together to provide up to 80-

A point-of-load.