MAX8553/MAX8554 is a 4.5V to 28V input, synchronous buck controller providing a complete power management solution for DDR memories.
The MAX8553 and MAX8554 are synchronous buck regulators that operate from a 4.5 V to 28 V input range and deliver up to 25 A of balanced source current. They are designed for DDR memory power‑management in servers, laptops, storage systems and other high‑performance applications.
Key features include Quick‑PWM control for fast transient response, selectable switching frequencies (200 kHz‑550 kHz), up to 95 % efficiency, and a compact 16‑pin QSOP package. The devices provide integrated VTT/VTTR tracking, adjustable fold‑back current limit, digital soft‑start, and over‑voltage protection. This manual is written in Chinese.
| Input voltage range | 4.5 V – 28 V |
|---|---|
| Maximum output current | 25 A |
| Typical efficiency | up to 95 % |
| Selectable switching frequency | 200 kHz / 300 kHz / 400 kHz / 550 kHz |
| Package | 16‑pin QSOP |
The devices operate from 4.5 V to 28 V input.
They can provide up to 25 A of balanced source current.
Typical efficiency can reach up to 95 %.
Both devices are offered in a 16‑pin QSOP package.