MAX15118
Maxim Integrated
The MAX15118 high-efficiency, current-mode step-down regulator with integrated power switches operates from 2.7V to 5.5V and delivers up to 18A output current
Design DocumentAnalog
MAXREFDES1020: 0.68V Output Step-Down Regulator Reference Design using MAX15118
Technical guide for a 0.68V synchronous buck converter using the MAX15118 regulator. Delivers 6A from a 2.7V-4.5V input with 86% efficiency and 1MHz switching frequency.
Overview
This design document describes the MAXREFDES1020, a high-efficiency synchronous buck converter reference design based on the Maxim Integrated MAX15118 step-down regulator. The design is optimized for low-voltage, high-current applications, delivering a 0.68V DC output at up to 6A from an input range of 2.7V to 4.5V. Operating at a factory-trimmed 1MHz switching frequency, the circuit utilizes a current-mode control architecture to enable a compact design with all-ceramic capacitors. The document provides detailed hardware specifications, a systematic design procedure for component selection (inductors, input/output capacitors), and loop compensation guidelines. Key features highlighted include integrated power switches, skip mode for improved light-load efficiency, and ±1% feedback accuracy. The MAXREFDES1020 utilizes the same PCB layout as the MAX15118 evaluation kit.
Use Cases
- Microprocessor and FPGA core power supplies
- High-current point-of-load regulation
- Portable and battery-powered electronics
- Low-voltage high-efficiency power modules
Topics
MAX15118
MAXREFDES1020
synchronous buck converter
step-down regulator
current-mode control
DC-DC converter
0.68V power supply
point-of-load
Referenced Parts
| MAX15118 | Maxim Integrated | The MAX15118 high-efficiency, current-mode step-down regulator with integrated power switches operates from 2.7V to 5.5V and delivers up to 18A output current |