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RT8876B 데이터시트 PDF




Richtek에서 제조한 전자 부품 RT8876B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 RT8876B 자료 제공

부품번호 RT8876B 기능
기능 Dual Channel PWM Controller
제조업체 Richtek
로고 Richtek 로고


RT8876B 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



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RT8876B 데이터시트, 핀배열, 회로
®
RT8876B
Dual Channel PWM Controller with 3/2/1 Phase for CORE VR
and Single Phase for AXG VR
General Description
The RT8876B is a VR12/IMVP7 compliant CPU power
controller which includes two channels : a 3/2/1 phase
with 3 integrated drivers synchronous Buck controller for
the CORE VR, and a single phase Buck controller for the
AXG VR. The RT8876B adopts G-NAVPTM (Green Native
Adaptive Voltage Positioning), which is Richtek's
proprietary topology derived from a finite DC gain
compensator with current mode control, making it an easy
setting PWM controller, meeting all Intel CPU
requirements of AVP. Based on the G-NAVPTM topology,
the RT8876B also features a quick response mechanism
for optimizing AVP performance during load transient. The
RT8876B supports mode transition function with various
operating states. A serial VID (SVID) interface is built in
the RT8876B to communicate with Intel VR12/IMVP7
compliant CPU. The RT8876B 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 RT8876B varies with VID, load and input
voltage to further enhance the efficiency even in CCM.
The built-in high accuracy DAC converts the SVID code
ranging from 0.25V to 1.52V with 5mV per step. The
RT8876B integrates a high accuracy ADC for platform
setting functions, such as no-load offset or over current
level.
Features
VR12/IMVP7 Compatible Power Management
3/2/1 Phase for CORE VR and Single Phase for AXG
VR
3 Embedded MOSFET Drivers at the CORE VR
G-NAVPTM Topology
Serial VID Interface
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
1.1VINITIAL / 0.0VINITIAL for both Rails at Startup
Power Ready Indicator
Thermal Throttling
Current Monitor Output
OVP, UVP, OCP, OTP, UVLO
External No-load Offset Setting for both Rails
DVID Enhancement
56-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
VR12/IMVP7 Intel Core Supply
Notebook/ Desktop Computer/ Servers Multi-phase CPU
Core Supply
AVP Step-Down Converter
Simplified Application Circuit
To CPU
RT8876B
VR_RDY PHASE1
VRHOT
VCLK
PHASE2
PHASE3
VDIO
ALERT
PWMA
MOSFET
MOSFET
MOSFET
RT9612
MOSFET
VCORE
VAXG
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8876B-00 August 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1




RT8876B pdf, 반도체, 판매, 대치품
RT8876B
Pin No.
49, 53, 47
Pin Name
LGATE [1:3]
50, 54, 46 PHASE [1:3]
51, 55, 45
52, 56, 44
57
(Exposed Pad)
UGATE [1:3]
BOOT [1:3]
GND
Pin Function
Low Side Drive Output. This pin drives the gate of low side MOSFET.
Switch node of High Side Driver. Connect the pin to high side MOSFET source
together with the low side MOSFET drain and the inductor.
High Side Drive Output. Connect the pin to the gate of high side MOSFET.
Bootstrap Power Pin. This pin powers high side MOSFET driver.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Function Block Diagram
IMON
RGNDA
FBA
COMPA
DVIDA
DVID
OFS
RGND
FB
COMP
IBIAS
ISEN3P
ISEN3N
ISEN2P
ISEN2N
ISEN1P
ISEN1N
Current
Monitor
VSET
Current
Monitor
VSETA
From Control Logic
DAC
Soft-Start & Slew
Rate Control +/-
Offset
Generator
MUX
ADC
VSETA
+
-
ERROR
AMP
Offset
Cancellation
POR
UVLO
SVID XCVR
Control &
Protection Logic
PWM
+ CMP
-
1/20
1/20
From Control Logic
Offset
Generator
DAC
To Protection Logic
OVP/UVP/NVP OCP
+
20
-
TON
Gen
Soft-Start & Slew
Rate Control
VSET
+
-
+
10
-
+
10
-
Offset
Cancellation
PWM
CMP
+
-
+ QR
+ CMP
-
VQR_TRIP
PHASE
Selector
TON
3-PH
Gen PWM Driver
[1:3]
SUM
To Protection Logic
OVP/UVP/NVP
OCP
Current Balance
+
10
-
OCSET
GND
QRSET
QRSETA
PWMA
TONSETA
ISENAP
ISENAN
OCSETA
TONSET
BOOTx
UGATEx
PHASEx
LGATEx
RSET
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
4
is a registered trademark of Richtek Technology Corporation.
DS8876B-00 August 2015

4페이지










RT8876B 전자부품, 판매, 대치품
RT8876B
VID7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
VID6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
VID5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
VID4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
VID3
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
VID2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
VID1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
VID0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Hex
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F
50
Voltage (V)
0.445
0.450
0.455
0.460
0.465
0.470
0.475
0.480
0.485
0.490
0.495
0.500
0.505
0.510
0.515
0.520
0.525
0.530
0.535
0.540
0.545
0.550
0.555
0.560
0.565
0.570
0.575
0.580
0.585
0.590
0.595
0.600
0.605
0.610
0.615
0.620
0.625
0.630
0.635
0.640
0.645
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8876B-00 August 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
7

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