Description:
The ADP3421 is a hysteretic dc-dc buck converter controller with two auxiliary linear regulator controllers. The ADP3421 provides a total power conversion control solution for a microprocessor by delivering the core, I/O, and clock voltages. The optimized low-voltage design is powered from the 3.3 V system supply and draws only 10 μA maximum in shutdown. The main output voltage is set by a 5-bit VID code. To accommodate the transition time required by the newest processors for on-thefly VID changes, the ADP3421 features high-speed operation to allow a minimized inductor size that results in the fastest change of current to the output. To further allow for the minimum number of output capacitors to be used, the ADP3421 features active voltage positioning that can be optimally compensated to ensure a superior load transient response. The main output signal interfaces with the ADP3410 dual MOSFET driver, which is optimized for high speed and high efficiency for driving
both the upper and lower (synchronous) MOSFETs of the buck converter.
ADP3421 Geyserville-Enabled DC-DC Converter Controller for Mobile CPUs SOP-28 By Analog Devices Features:
Meets Intel® Mobile Voltage Positioning Requirements
Lowest Processor Dissipation for Longest Battery Life
Best Transient Containment
Minimum Number of Output Capacitors
System Power Management Compliant
Fast, Smooth Output Transition During VID Code Change
Programmable Current Limit
Power Good
Integrated LDO Controllers for Clock and I/O Supplies
Programmable UVLO
Soft Start with Restart Lock-In
Applications:
Geyserville-Enabled Core DC-DC Converters
Fixed Voltage Mobile CPU Core DC-DC Converters
Notebook/Laptop Power Supplies
Programmable Output Power Supplies
IBM T series Laptop Computer
Package included:
- 1 X ADP3421 Geyserville-Enabled DC-DC Converter Controller for Mobile CPUs SOP-28 By Analog Devices
