DC-DC Controller
Multiple Phase Buck Controller
uP9521Q
4/3/2/1 + 3/2/1 Phase PWM Controller for IMVP8
Datasheets PDF
General Description
The uP9521Q is an IMVP8 compliant desktop CPU voltage regulator controller that integrates a 4-phase PWM controller for Vcore and a 3-phase PWM controller for VccGT. The Vcore controller can be configured as 4/3/2/1-phase and the VccGT controller can be configured as 3/2/ 1-phase for platform power design flexibility. This part outputs PWM signal to external MOSFET driver to drive the buck power stage.
The uP9521Q combines the true differential output voltage sense, differential inductor DCR current sense, input voltage feedforward sense and adaptive voltage positioning to provide accurately regulated power for desktop CPU. It adopts uPI’s proprietary RCOT+TM (Robust Constant On-Time) topology to have fast transient response and smooth mode transition.
The uP9521Q provides the VR_RDY indicator and selectable VR parameters. It also provides complete fault protection functions, including over voltage, under voltage, over current and under voltage lockout. The uP9521Q is available in VQFN6x6 – 52L package.
Pin Configuration & Typical Application Circuit
4+3 Phase
Feature
- Intel IMVP8 Compatible
- Support S-Line Desktop CPU
- Thermal Sense with VRHOT# Indication
- RCOT+TM Control Topology
- Easy Setting
- Smooth Mode Transition
- Fast Transition Response
- External MOSFET Driver Enable Control
- Support Operation Phase Disable Function
- Vcore: 4/3/2/1-Phase PWM Outputs
- VccGT: 3/2/1-Phase PWM Outputs
- Built-in ADC for Platform Parameter Setting
- Selectable Vboot Voltage
- Operation Phase Extension Function
- Enable Control and VR_RDY Indicator
- Differential Remote Voltage Sense
- Differential Current Balance Sense Amplifier
- OCP/OVP/UVP
- RoHS Compliant and Halogen Free
Application
- Desktop PC CPU Power Supplies