uP9503P
3/2/1+2/1/0-Phase Driver Embedded PWM Controller
with SMBus Digital Interface for AMD SVI2 GPU Power
Features
General Description
AMD SVI2 GPU Compliant
RCOT+TM Control Topology
The uP9503P is an AMD SVI2 compliant GPU voltage
regulator controller that integrates a 3-phase PWM
controller for VDDand a 2-phase controller for VDDA. The
VDDcontroller can be configured as 3/2/1-phase, and the
VDDA controller can be configured as 2/1/0-phase (0
denotes VDDA controller is disabled) for platform power
design flexibility. This part integrates 2 bootstrap diode
embedded 12V MOSFET drivers. For the typical 3+2-phase
application, the 3-phase VDD controller has 2 embedded
MOSFET driver and 1 PWM output. The 2-phase VDDA
controller has 2 PWM outputs. The controller provides further
flexible operating phase configurations to support 5+0 or
4+1 phase application (0 denotes VDDA controller is
disabled). 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
2 Integrated 12V MOSFET Drivers for VDD
Embedded Bootstrap Diode
Flexible Operation Phase Configuration
3/2/1-Phase PWM Controller for VDD
2/1/0-Phase PWM Controller for VDDA
Support Operation Phase Disable Function
Support 5+0 or 4+1 Phase Application
SMBus Interface for Performance and Efficiency
Optimization
Dynamic Programmable VR Parameters
Programmable Protection Thresholds
VR Output Reporting
Programmable Loop Gain
The uP9503P combines true differential output voltage
sense, differential inductorDCR current sense, input voltage
feed-forward sense and adaptive voltage positioning to
provide accurately regulated power forGPU. It adopts uPI
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.
Programmable Operation Frequency
Inductor DCR Current Sensing for Droop/
Channel OCP/ Total OCP
Differential Current Sense Amplifier for Current
Balance
Differential Remote Output Voltage Sense
Transient Boost for Fast Transient Response
High Accuracy DAC
OCP/UVP/OVP
RoHS Compliant and Halogen Free
The uP9503P has built-in serial interface to communicate
withAMDSVI2 compliantGPU. It supports mode transition
function with various operating states. This part provides
two different VID on-the-fly slew rates, which can be
programmed by the SMBus register.
Applications
AMD VGA Card GPU Power Supplies
Pin Configuration
The uP9503Pprovides power good indicator and selectable
VR parameters, such as 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 uP9503P is
available in VQFN6x6-52L package.
39 38 37 36 35 34 33 32 31 30 29 28 27
CSN2 40
CSP3 41
CSN3 42
CSP 43
26 PWM3
25 FBRTN
24 DAC
23 EAP
22 FB
Ordering Information
CSN 44
CSNA 45
21 TP
Order Number
uP9503PQGW
Package
Remark
46
53 GND
20
19
18
17
16
15
14
CSPA
COMP
TONSET
IMON
IMONA
EN
CSN1A 47
CSP1A 48
CSN2A 49
CSP2A 50
PWROK 51
PWM1A 52
VQFN6x6-52L
Note:
(1) Please check the sample/production availability with
uPI representatives.
VCC5
PROG
(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) p lating that are suitable
for use in SnPb or Pb-free soldering processes.
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uP9503P-DS-F0000, June 2017
www.upi-semi.com
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