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RT8880B PDF даташит

Спецификация RT8880B изготовлена ​​​​«Richtek» и имеет функцию, называемую «Dual-Output PWM Controller».

Детали детали

Номер произв RT8880B
Описание Dual-Output PWM Controller
Производители Richtek
логотип Richtek логотип 

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RT8880B Даташит, Описание, Даташиты
®
RT8880B
Dual-Output PWM Controller with 3 Integrated Drivers for
AMD SVI2 Mobile CPU Power Supply
General Description
The RT8880B is a 3 + 2 phases PWM controller, and is
compliant with AMD SVI2 Voltage Regulator Specification
to support both CPU core (VDD) and Northbridge portion
of the CPU (VDDNB). The RT8880B features CCRCOT
(Constant Current Ripple Constant On-Time) with G-NAVP
(Green-Native AVP), which is Richtek's proprietary
topology. The G-NAVP makes it an easy setting controller
to meet all AMDAVP (Adaptive Voltage Positioning) VDD/
VDDNB requirements. The droop is easily programmed
by setting the DC gain of the error amplifier. With proper
compensation, the load transient response can achieve
optimized AVP performance. The controller also uses the
interface to issue VOTF Complete and to send digitally
encoded voltage and current values for the VDD and
VDDNB domains. It can operate in single phase and diode
emulation mode and reach up to 90% efficiency in different
modes according to different loading conditions. The
RT8880B provides special purpose offset capabilities by
pin setting. The RT8880B also provides power good
indication, over-current indication (OCP_L) and dual OCP
mechanism for AMD SVI2 CPU core and NB. It also
features complete fault protection functions including over-
voltage, under-voltage and negative-voltage protections.
Features
3/2/1-Phase (VDD) + 2/1-Phase (VDDNB) PWM
Controller
3 Embedded MOSFET Drivers
G-NAVPTM Topology
Support Dynamic Load-Line and Zero Load-Line
Diode Emulation Mode at Light Load Condition
SVI2 Interface to Comply with AMD Power
Management Protocol
Build-in ADC for VOUT and IOUT Reporting
Immediate OV, UV and NV Protections and UVLO
Programmable Dual OCP Mechanism
0.5% DAC Accuracy
Fast Transient Response
Power Good Indicator
Over-Current Indicator
52-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
AMD SVI2 Mobile CPU
Laptop Computer
Simplified Application Circuit
To CPU
RT8880B
OCP_L PHASE1
SVC
SVD
PHASE2
PWM3
PHASEA1
SVT PWMA2
MOSFET
MOSFET
RT9610
MOSFET
RT9610
MOSFET
MOSFET
VVDD
VVDDNB
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8880B-03 January 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1









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RT8880B Даташит, Описание, Даташиты
RT8880B
Ordering Information
RT8880B
Package Type
QW : WQFN-52L 6x6 (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
RT8880B
GQW
YMDNN
RT8880BGQW : Product Number
YMDNN : Date Code
Pin Configurations
(TOP VIEW)
52 51 50 49 48 47 46 45 44 43 42 41 40
UGATE2 1
BOOT2 2
PWM3 3
TONSET 4
ISEN2P 5
ISEN2N 6
ISEN1N 7
ISEN1P 8
ISEN3P 9
ISEN3N 10
VSEN 11
FB 12
COMP 13
GND
53
39 PGOOD
38 PGOODA
37 EN
36 ISENA1P
35 ISENA1N
34 ISENA2N
33 ISENA2P
32 VSENA
31 FBA
30 COMPA
29 IBIAS
28 VCC
27 OCP_L
14 15 16 17 18 19 20 21 22 23 24 25 26
WQFN-52L 6x6
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8880B-03 January 2015









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RT8880B Даташит, Описание, Даташиты
RT8880B
Functional Pin Description
Pin No.
Pin Name
Pin Function
3 PWM3
PWM Outputs for Channel 3 VDD Controller.
4 TONSET
VDD Controller On-Time Setting. Connect this pin to the converter input
voltage, VIN, through a resistor, RTON, to set the on-time of UGATE and
also the output voltage ripple of VDD controller.
5, 8, 9
ISEN1P to ISEN3P Positive Current Sense Input of Channel 1, 2 and 3 for VDD Controller.
6, 7, 10
ISEN1N to ISEN3N Negative Current Sense Input of Channel 1, 2 and 3 for VDD Controller.
11 VSEN
VDD Controller Voltage Sense Input. This pin is connected to the terminal
of VDD controller output voltage.
12 FB
Output Voltage Feedback Input of VDD Controller. This pin is the negative
input of the error amplifier for the VDD controller.
13 COMP
14 RGND
15 IMON
Compensation Node of the VDD Controller.
Return Ground of VDD and VDDNB Controller. This pin is the common
negative input of output voltage differential remote sense for VDD and
VDDNB controllers.
Current Monitor Output for the VDD Controller. This pin outputs a voltage
proportional to the output current.
16 V064
Fixed 0.64V Output Reference Voltage Output. This voltage is only used to
offset the output voltage of IMON pin and IMONA pin. Connect a 0.47F
capacitor from this pin to GND.
17 IMONA
Current Monitor Output for the VDDNB Controller. This pin outputs a
voltage proportional to the output current.
18 VDDIO
Processor Memory Interface Power Rail and Serves as the Reference for
PWROK, SVD, SVC and SVT. This pin is used by the VR to reference the
SVI pins.
19 PWROK
System Power Good Input. If PWROK is low, the SVI interface is disabled
and VR returns to BOOT-VID state with initial load line slope and initial
offset. If PWROK is high, the SVI interface is running and the DAC
decodes the received serial VID codes to determine the output voltage.
20 SVC
Serial VID Clock Input from Processor.
21 SVD
Serial VID Data input from Processor. This pin is a serial data line.
22 SVT
Serial VID Telemetry Input from VR. This pin is a push-pull output.
23 OFS
Over Clocking Offset Setting for the VDD Controller.
24 OFSA
Over Clocking Offset Setting for the VDDNB Controller.
25 SET1
1st Platform Setting. Platform can use this pin to set OCP_TDC threshold,
DVID compensation bit1 and internal ramp slew rate.
26 SET2
2st Platform Setting. Platform can use this pin to set quick response
threshold, OCP_TDC trigger delay time, DVID compensation bit0, VDDNB
rail zero load-line enable setting and over clocking offset enable setting.
27 OCP_L
Over-Current Indicator for Dual OCP Mechanism. This pin is an open-drain
output.
28 VCC
Controller Power Supply Input. Connect this pin to 5V with an 1F or
greater ceramic capacitor for decoupling.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8880B-03 January 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3










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