RT8889C PWM Controller Datasheet

RT8889C Datasheet, PDF, Equivalent


Part Number

RT8889C

Description

3-Phase PWM Controller

Manufacture

Richtek

Total Page 30 Pages
Datasheet
Download RT8889C Datasheet


RT8889C
®
RT8889C
3-Phase PWM Controller with Triple Integrated Drivers for
VR12.5 CPU Core Power Supply
General Description
The RT8889C is a three phase CPU power controller with
triple integrated drivers for VR12.5 compliant. The
RT8889C adopts G-NAVPTM (Green Native AVP) which is
Richtek's proprietary topology derived from finite DC gain
of EA amplifier with current mode control, making it an
easy setting the droop to meet all Intel CPU requirements
of AVP (Adaptive Voltage Positioning). Based on the G-
NAVPTM topology, the RT8889C also features a quick
response mechanism for optimized AVP performance
during load transient. The RT8889C supports mode
transition function with various operating states. A Serial
VID (SVID) interface is built in the RT8889C to
communicate with Intel VR12.5 compliant CPU. The
RT8889C supports VID on-the-fly function with three
different slew rates : Fast, Slow and Decay. By utilizing
the G-NAVPTM topology, the operating frequency of the
RT8889C varies with VID, load current and input voltage
to further enhance the efficiency even in CCM. Besides
G-NAVPTM, the CCRCOT (Constant Current Ripple
Constant On Time) technology provides superior output
voltage ripple over the entire input/output range. The built-
in high accuracy DAC converts the SVID code ranging
from 0.5V to 3.04V with 10mV per step. The RT8889C
integrates a high accuracy ADC for platform setting
functions, such as no-load offset and over current
protection level. It also features complete fault protection
functions including Over Voltage (OV), Under Voltage (UV),
Negative Voltage (NV), Over Current (OC) and Under
Voltage Lockout (UVLO). The RT8889C is available in a
WQFN-40L 5x5 small foot print package.
Features
Intel VR12.5 Serial VID Interface Compatible Power
Management States
3/2/1 Phase PWM Controller with Triple Integrated
Driver
G-NAVPTM Topology
0.5% DAC Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming
Accurate Current Balance
System Thermal Compensated AVP
Diode Emulation Mode at Light Load Condition for
Single Phase
Fast transient Response
VR Ready Indicator
Thermal Throttling
Current Monitor Output
OVP, UVP, OCP, UVLO
External No-Load Offset Setting
DVID Enhancement
Small 40-Lead WQFN Package
Applications
VR12.5 Intel Core Supply
Notebook/Desktop Computer/Servers Multi-phase CPU
Core Supply
AVP Step-Down Converters
Simplified Application Circuit
To PCH
To CPU
RT8889C
VR_RDY PHASE1
VR_HOT
VCLK
PHASE2
VDIO
ALERT PHASE3
MOSFET
MOSFET
MOSFET
VCORE
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8889C-00 July 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

RT8889C
RT8889C
Ordering Information
RT8889C
Package Type
QW : WQFN-40L 5x5 (W-Type)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
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.
Marking Information
RT8889C
GQW
YMDNN
RT8889CGQW : Product Number
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
UGATE2 1
BOOT2 2
30
29
EN 3
28
ISEN2P 4
27
ISEN2N 5
ISEN1N 6
GND
26
25
ISEN1P 7
24
ISEN3P 8
ISEN3N 9
41 23
22
IMON 10
21
11 12 13 14 15 16 17 18 19 20
BOOT3
VR_RDY
TONSET
VCLK
ALERT
VDIO
VR_HOT
TSEN
IBIAS
SET3
WQFN-40L 5x5
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8889C-00 July 2014


Features ® RT8889C 3-Phase PWM Controller with Triple Integrated Drivers for VR12.5 CP U Core Power Supply General Descriptio n The RT8889C is a three phase CPU powe r controller with triple integrated dri vers for VR12.5 compliant. The RT8889C adopts G-NAVPTM (Green Native AVP) whic h is Richtek's proprietary topology der ived from finite DC gain of EA amplifie r with current mode control, making it an easy setting the droop to meet all I ntel CPU requirements of AVP (Adaptive Voltage Positioning). Based on the GNAV PTM topology, the RT8889C also features a quick response mechanism for optimiz ed AVP performance during load transien t. The RT8889C supports mode transition function with various operating states . A Serial VID (SVID) interface is buil t in the RT8889C to communicate with In tel VR12.5 compliant CPU. The RT8889C s upports VID on-the-fly function with th ree different slew rates : Fast, Slow a nd Decay. By utilizing the G-NAVPTM top ology, the operating frequency of the RT8889C varies with VID, l.
Keywords RT8889C, datasheet, pdf, Richtek, 3-Phase, PWM, Controller, T8889C, 8889C, 889C, RT8889, RT888, RT88, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)