This document is an introduction to UCD9240, which is a multi-output multi-phase non-isolated DC/DC PWM power supply controller that supports multiple soft-start and soft-stop configurations, including prebias start-up.
The UCD9240 digital PWM system controller integrates a configurable multi‑output, multi‑phase buck architecture for non‑isolated DC/DC power applications. It supports up to four voltage rails, eight phases, and provides 12‑bit digital monitoring of input/output voltages, currents, and temperatures. The device includes hardware‑accelerated compensation, soft‑start/stop, voltage tracking, and phase‑adding/shedding capabilities.
A Fusion Digital Power™ Designer GUI allows engineers to configure parameters, store them in on‑chip non‑volatile memory, and simulate performance. The datasheet also details electrical specifications, timing characteristics for SMBus/PMBus, fault detection latency, and recommended PCB layout guidelines.
| Supply voltage range | 3.0 V – 3.6 V |
|---|---|
| Maximum switching frequency | 2 MHz |
| Digital monitoring resolution | 12‑bit |
| Number of controllable voltage rails | Up to 4 |
| Non‑volatile memory with ECC | Enhanced with Error Correction Code |
The controller supports switching frequencies up to 2 MHz.
It can control up to four voltage rails.
Yes, it offers 12‑bit digital monitoring of input/output voltage, current, and temperature.