uP9508Q
3/2/1+2/1-Phase PWM Controller
with SMBus Digital Interface Control for IMVP8
Features
General Description
Intel IMVP8 Compatible
Support S-Line Desktop CPU
Thermal Sense with VRHOT# Indication
RCOT+TM Control Topology
The uP9508Q is an IMVP8 compliant desktop CPU voltage
regulator controller that integrates a 3-phase PWM
controller for Vcore and a 2-phase PWM controller for
VccGT. The Vcore controller can be configured as 3/2/1-
phase, and the VccGT controller can be configured as 2/1-
phase for platform power design flexibility. This part outputs
PWM signal to external MOSFET driver to drive the buck
power stage. The integrated SMBus interface
programmability makes this part with high performance and
easy design. Designer can define different power scenario
for different current states to optimize the performance and
efficiency.
Easy Setting
Smooth Mode Transition
Fast Transition Response
External MOSFET Driver Enable Control
Support Operation Phase Disable Function
Vcore: 3/2/1-Phase PWM Outputs
VccGT: 2/1-Phase PWM Outputs
Build-in ADC for Platform Parameter Setting
Selectable SVID VR Address
Selectable SMBus Device Address
Selectable Vboot Voltage
The uP9508Q combines true differential output voltage
sense, differential inductorDCR 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. Similar to digital based PWM controller, the loop
gain is also programmable by SMBus interface to achieve
design flexibility.
Operation Phase Extension Function
SMBus Interface for Performance and Efficiency
Optimization
Dynamic Programmable VR Parameters
Programmable Protection Thresholds
VR Output Reporting
Programmable Loop Gain
System Input Power Monitor PSYSADC
Enable Control and VR_RDY Indicator
System Thermal Management
Differential Remote Voltage Sense
Differential Current Balance Sense Amplifier
OCP/OVP/UVP/Thermal Shutdown
RoHS Compliant and Halogen Free
The uP9508Q provides system input power monitor (PSYS)
ADC, VR_RDY indicator and selectable VR parameters,
such as SVID VR address, SMBus device address and
Vboot voltage. It also provides complete fault protection
functions, including over voltage, under voltage, over current,
over temperature and under voltage lockout. The uP9508Q
is available in VQFN6x6 - 52L package.
Applications
Desktop PC CPU Power Supplies
Pin Configuration
Ordering Information
Order Number
uP9508QQGW
Package
Remark
39 38 37 36 35 34 33 32 31 30 29 28 27
VQFN6x6 - 52L
26
25
24
23
22
21
20
19
18
17
16
40
41
42
43
44
45
46
47
48
49
50
51
52
SDIO
CSN2A
TSENSEA
TONSET
TSENSE
PSYS
ALERT#
SCLK
VRHOT#
SDA
Note:
(1) Please check the sample/production availability with
uPI representatives.
(2) uPI products are compatible with the current IPC/JEDEC
J-STD-020 requirement. They are halogen-free, RoHS
compliant and 100% matte tin (Sn) plating that are suitable
for use in SnPb or Pb-free soldering processes.
SCL
SYSFAULT#
PWM1A
PWM2A
PROG3
53
GND
VCC
VINSEN
IMON
FBRTN
DAC
DRCTRL
PROG2
15 EAP
14 FB
PROG1
PWM1
1
2
3
4
5
6
7
8
9 10 11 12 13
uP9508Q-DS-F0000, May 2017
www.upi-semi.com
1