The UCD9222RGZT is a two-rail synchronous buck digital Pulse Width Modulation (PWM) Controller designed for non-isolated DC/DC power applications. This device integrates dedicated circuitry for DC/DC loop management with support for up to two VID interfaces. Additionally, it has flash memory and a serial interface to support configurability, monitoring and management. Several Voltage Identification (VID) modes are supported, including a 4-bit parallel interface, a 6-bit interface and a 8-bit serial interface. It is designed to provide a wide variety of desirable features for non-isolated DC/DC converter applications while minimizing the total system component count by reducing external circuits. The solution integrates multi-loop management with sequencing, margining and tracking to optimize for total system efficiency. Additionally, loop compensation and calibration are supported without the need to add external components.
- Fully configurable two-output non-isolated DC/DC
- Duty-cycle resolution
- Up to 1mV closed loop resolution
- Supports multiple soft-start and soft-stop configurations including prebias start-up
- Supports voltage margining and sequencing
- Auxiliary ADC inputs
- Multiple levels of over-current fault protection
- External current fault inputs
- Analog comparators monitor current sense voltage
- Current continually digitally monitored
- Over and under-voltage fault protection
- Over-temperature fault protection
- Enhanced nonvolatile memory with error correction code (ECC)
- Device operates from a single supply with an internal regulator
- Controller that allows operation over a wide supply voltage range
- Supported by Fusion Digital Power? designer, a full featured
- PC based design tool to simulate, configure and monitor power supply performance
- Green product and no Sb/Br
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