IT电源管理芯datasheet-ucd9222.pdf

UCD9222 SLVSAL7A –NOVEMBER 2010 –REVISED FEBRUARY 2011 Digital PWM System Controller with 4-bit, 6-bit, or 8-bit VID Support Check for Samples: UCD9222 1 FEATURES APPLICATIONS 2 • Fully Configurable Two-Output Non-Isolated • Networking Equipment DC/DC PWM Controller with support for • Telecommunications Equipment TMS320C6670™and TMS320C6678 ™DSP VID • FPGA, DSP, and Memory Power interface • Supports Switching Frequencies Up to 2MHz DESCRIPTION With 250 ps Duty-Cycle Resolution The UCD9222 is a two-rail synchronous buck digital • Up To 1mV Closed Loop Resolution PWM controller designed for non-isolated DC/DC • Hardware-Accelerated, 3-Pole/3-Zero power applications. This device integrates dedicated Compensator with Non-Linear Gain for circuitry for DC/DC loop management with support for Improved Transient Performance up to two VID interfaces. Additionally, the UCD9222 has flash memory and a serial interface to support • Supports Multiple Soft-Start and Soft-Stop configurability, monitoring and management. Configurations Including Prebias Start-up