The MAX8529 is a high performance synchronous step-down converter from TI, with an input voltage range of 4.75V to 23V and a maximum output current of 3A. It integrates 2 synchronous step-down converters, and can achieve output voltage tracking by external inductors. The conversion efficiency is up to 96%
The MAX8529 dual step‑down controller generates two independent outputs from a 4.75 V‑23 V input. Each output can be set from sub‑1 V to 18 V, and the device supports synchronized 180° out‑of‑phase operation for reduced input ripple and higher efficiency. Features include soft‑start/soft‑stop, lossless current‑limit without sense resistors, and a power‑on‑reset output.
The controller is supplied in a 24‑pin QSOP package and is intended for applications such as DSL modems, routers, set‑top boxes, and other broadband equipment. An evaluation kit is available for rapid prototyping.
| Input voltage range | 4.75 V to 23 V |
|---|---|
| Output voltage range | 0 V to 18 V (up to 6 A) |
| Switching frequency | 600 kHz to 1.5 MHz (adjustable) |
| Efficiency | > 90 % |
| Package | 24‑pin QSOP |
| Operating temperature range | -40 °C to +85 °C |
| Current‑limit feature | Foldback current limit, lossless (no sense resistor) |
| Power‑on‑reset output | RST output with 140 ms minimum delay |
The device operates with an input supply from 4.75 V up to 23 V.
The switching frequency is set by an external resistor (Rosc) and can be adjusted between 600 kHz and 1.5 MHz.
Each output can be programmed from below 1 V up to 18 V, with a maximum current of 6 A.
No, it uses the MOSFET’s on‑resistance as a lossless current‑sense element.