General Description

The Himalaya series of voltage regulator ICs and power

modules enable cooler, smaller, and simpler power supply

solutions. The MAXM17543 is an easy-to-use, step-down

power module that combines a switching power supply

controller, dual n-channel MOSFET power switches, fully

shielded inductor, and the compensation components in

a low-profile, thermally-efficient, system-in-package (SiP).

The device operates over a wide input voltage range of

4.5V to 42V and delivers up to 2.5A continuous output

current with excellent line and load regulation over an output

voltage range of 0.9V to 12V. The device only requires

five external components to complete the total power

solution. The high level of integration significantly reduces

design complexity, manufacturing risks, and offers a true

plug-and-play power supply solution, reducing time-to-

market.

The device can be operated in the pulse-width modulation

(PWM), pulse-frequency modulation (PFM), or discontinu-

ous conduction mode (DCM) control schemes.

The MAXM17543 is available in a low-profile, highly

thermal-emissive, compact, 29-pin 9mm x 15mm x

2.8mm SiP package that reduces power dissipation in

the package and enhances efficiency. The package is

easily soldered onto a printed circuit board and suitable

for automated circuit board assembly. The device can

operate over the industrial temperature range from -40°C

to +125°C.

Applications

● Industrial Power Supplies

● Distributed Supply Regulation

● FPGA and DSP Point-of-Load Regulator

● Base Station Point-of-Load Regulator

● HVAC and Building Control

Features and Benefits

● Reduces Design Complexity, Manufacturing Risks,

and Time-to-Market

• Integrated Switching Power Supply Controller and

Dual-MOSFET Power Switches

• Integrated Inductor

• Integrated Compensation Components

• Integrated Thermal-Fault Protection

• Integrated Peak Current Limit

● Saves Board Space in Space-Constrained Applications

• Complete Integrated Step-Down Power Supply in a

Single Package

• Small Profile 9mm x 15mm x 2.8mm SiP Package

• Simplified PCB Design with Minimal External BOM

Components

● Offers Flexibility for Power-Design Optimization

• Wide Input Voltage Range from 4.5V to 42V

• Output-Voltage Adjustable Range from 0.9V to 12V

• Adjustable Frequency with External Frequency

Synchronization (100kHz to 1.8MHz)

• Soft-Start Programmable

• Autoswitch PWM, PFM, or DCM Current-Mode Control

• Optional Programmable EN/UVLO

Ordering Information appears at end of data sheet.

19-7450; Rev 0; 11/14

MAXM17543

4.5V to 42V, 2.5A High-Efficiency, DC-DC Step-

Down Power Module with Integrated Inductor

4.5V TO 42V

IN

SS

SGND

PGND

PGND

FB

OUT

OUT

OUT

OUT

OUT

OUT

OUT

SYNC

MAXM17543

OPTIONAL

EP3

RESET

EN

MODE

RT

CF

EP1

Typical Application Circuit