RT8152A/B
Single-Phase PWM Controller for CPU / GPU Core Power
Supply
General Description
Features
z Single Phase PWM Controller with Integrated MOS
The RT8152A/B is a single phase PWM controller with
integrated MOSFET drivers. Moreover, it is compliant with
Intel IMVP6.5 Voltage Regulator Specification to fulfill its
mobile CPU core and Render core voltage regulator
requirements.
Driver.
z Low-Gain Compensator with CCRCOT Topology
(Constant Current Ripple Constant On Time)
z 7-bit DAC
z 0.8% DAC Accuracy
The RT8152A/B adopts G-NAVP (Green-Native AVP),
which is a Richtek's proprietary topology derived from finite
DC gain compensator constant on-time mode, making it
an easy-setting PWM controller meeting all Intel AVP
(Active Voltage Positioning) mobile CPU/Render
requirements. The output voltage of the RT8152A/B is set
by 7-bit VIDcode. The built-in high accuracyDAC converts
the VID code ranging from 0V to 1.5V with 12.5mV per
step. The system accuracy of the controller can reach
1.5%. The part supports VIDon-the-fly and mode change
on-the-fly functions that are fully compliant with IMVP6.5
specification. It operates in single phase and diode
emulation modes. It can reach up to 90% efficiency in
different modes according to different loading conditions.
The droop load-line can be easily programmed by setting
the DC gain of the error amplifier. With proper
compensation, the load transient can achieve optimized
AVP performance. This chip controls soft-start and output
transition slew rate via a capacitor. It supports both DCR
and sense-resistor current sensing.
z 1.5% or 11.5mV System Accuracy
z Fixed VBOOT (For CPU Core Only)
z Differential Remote Voltage Sensing
z G-NAVP Topology (Green-Native AVP)
z Programmable Output Transition Slew Rate Control
z System Thermal Compensated AVP
z Ringing Free Mode at Light Load Condition
z Fast Transient Response
z IMVP6.5 Compatible Power Management States
z Power Good
z Clock Enable Output (For CPU Core Only)
z Thermal Throttling
z Current Monitor Output
z Switching Frequency Up to 1MHz
z OVP, UVP, OCP, OTP, UVLO, NVP
z 32-Lead WQFN Package
z RoHS Compliant and Halogen Free
Ordering Information
RT8152
The RT8152A/B provides power good and thermal throttling
output signals for IMVP6.5 Render core specification, and
additional clock enabling for CPU core specification. It
also features complete fault protection functions including
over voltage, under voltage, negative voltage, over current
and thermal shutdown. The RT8152A/B is available in
WQFN-32L 5x5 small foot print package.
Package Type
QW : WQFN-32L 5x5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
BOOT Output Voltage
A : 1.1V
B : 1.2V
Note :
Applications
Richtek products are :
z IMVP6.5 CPU / Render Core Voltage Regulator
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
z AVP Step-Down Converter
z Notebook / Desktop Computer / Servers
DS8152A/B-04 April 2011
www.richtek.com
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