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RT8884C PDF даташит

Спецификация RT8884C изготовлена ​​​​«Richtek» и имеет функцию, называемую «Multi-Phase PWM Controller».

Детали детали

Номер произв RT8884C
Описание Multi-Phase PWM Controller
Производители Richtek
логотип Richtek логотип 

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RT8884C Даташит, Описание, Даташиты
®
RT8884C
Multi-Phase PWM Controller for CPU Core Power Supply
General Description
The RT8884C is a 4/3/2/1 multi-phase synchronous Buck
controller designed to meet Intel VR12.5 compatible CPU
specification with a serial VID control interface. The
RT8884C 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 easy
to set the droop to meet all Intel CPU requirements of
AVP (Adaptive Voltage Positioning). Based on the G-
NAVPTM topology, the RT8884C also features a quick
response mechanism for optimized AVP performance
during load transient. The RT8884C supports mode
transition function with various operating states. A Serial
VID (SVID) interface is built in the RT8884C to
communicate with Intel VR12.5 compliant CPU. The
RT8884C 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
RT8884C 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.
Features
Intel VR12.5 Serial VID Interface Compatible
4/3/2/1 Phase PWM Controller
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 Operation
Fast Transient Response
VR Ready Indicator
Thermal Throttling
Current Monitor Output
OVP, UVP, OCP, NVP, UVLO
External No-Load Offset Setting
DVID Enhancement
Small 32-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
VR12.5 Intel Core Power Supply
Notebook/Desktop Computer/Servers Multi-phase CPU
Core Power Supply
AVP Step-Down Converter
Simplified Application Circuit
To PCH
To CPU
RT8884C
VR_RDY PWM1
VR_HOT
VCLK
VDIO
ALERT
PWM2
PWM3
PWM4
RT9624A
RT9624A
RT9624A
RT9624A
VCORE
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8884C-00 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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RT8884C Даташит, Описание, Даташиты
RT8884C
Ordering Information
RT8884C
Package Type
QW : WQFN-32L 4x4 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
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
3J= : Product Code
3J=YM
DNN
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
ISEN1P
ISEN3P
ISEN3N
ISEN4N
ISEN4P
IMON
VREF
COMP
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4
5
GND
21
20
6 33 19
7 18
8 17
9 10 11 12 13 14 15 16
DVD
VR_RDY
TONSET
VCLK
ALERT
VDIO
VR_HOT
TSEN
WQFN-32L 4x4
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8884C-00 July 2015









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RT8884C Даташит, Описание, Даташиты
RT8884C
Functional Pin Description
Pin No.
Pin Name
Pin Function
1, 30, 2, 5 ISEN [1:4] P Positive Current Sense Inputs of Channel 1, 2, 3 and 4.
32, 31, 3, 4
6
7
8
9
10
11
12
13
14
ISEN [1:4] N
IMON
VREF
COMP
FB
VSEN
RGND
VCC
SET1
SET2
Negative Current Sense Inputs of Channel 1, 2, 3 and 4.
CPU CORE Current Monitor Output. This pin outputs a voltage proportional to
the output current.
Fixed 0.6V Output Reference Voltage. This voltage is only used to offset the
output voltage of IMON pin. Connect a 0.47F decoupling capacitor between
this pin and GND.
CORE VR Compensation. This pin is an error amplifier output pin.
Negative Input of the Error Amplifier. This pin is for output voltage feedback to
controller.
VR Voltage Sense Input. This pin is connected to the terminal of VR output
voltage.
Return Ground for VR. This pin is the negative node of the differential remote
voltage sensing.
Controller Power Supply. Connect this pin to 5V and place a minimum 2.2F
decoupling capacitor. The decoupling capacitor should be placed to this pin as
close as possible.
1st Platform Setting. Platform can use this pin to set DVID time, RSET, DVID
width and OCS.
2nd Platform Setting. Platform can use this pin to set ICCMAX, QRTH and
QRSET.
15 SET3
16 IBIAS
17 TSEN
3rd Platform Setting. Platform can use this to set output offset voltage.
Internal Bias Current Setting. Connect a 100kresistor from this pin to GND for
setting the internal current. Don’t connect a bypass capacitor from this pin to
GND.
Thermal Sense Input for CORE VR.
18
VR_HOT
Thermal Monitor Output. (Active low).
19 VDIO
VR and CPU Data Transmission Interface.
20 ALERT SVID Alert. (Active low)
21 VCLK
Synchronous Clock from the CPU.
22
TONSET
On-time Setting. An on-time setting resistor is connected from this pin to input
voltage.
23 VR_RDY
24 DVD
27, 28, 26, 25 PWM [1:4]
VR Ready Indicator.
Divided Input Voltage Detection of CORE VR. Connect this pin to a voltage
divider from input voltage of power stage to detect input voltage.
PWM Outputs for Channel 1, 2, 3 and 4.
29
33
(Exposed Pad)
EN
GND
VR Enable.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8884C-00 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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