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RT8886A PDF даташит

Спецификация RT8886A изготовлена ​​​​«Richtek» и имеет функцию, называемую «2-Phase Controller».

Детали детали

Номер произв RT8886A
Описание 2-Phase Controller
Производители Richtek
логотип Richtek логотип 

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RT8886A Даташит, Описание, Даташиты
®
RT8886A
2-Phase Controller with Dual Integrated Drivers for VR12.5
and VR12.6 Mobile CPU Core Power Supply
General Description
The RT8886A is a two phase CPU power controller with
dual integrated drivers for VR12.5 and VR12.6 compliant.
The RT8886A adopts the 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 RT8886A also features a quick
response mechanism for optimized AVP performance
during load transient. The RT8886A supports mode
transition function with various operating states. A Serial
VID (SVID) interface is built in the RT8886A to
communicate with Intel VR12.5 and VR12.6 compliant
CPU. The RT8886A supports VID on-the-fly function with
different slew rates. By utilizing the G-NAVPTM topology,
the operating frequency of the RT8886A varies with VID,
load current and input voltage to further enhance the
efficiency even in CCM. Besides the 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 RT8886A integrates a high
accuracy ADC for platform setting functions, such as no-
load offset and over-current protection level. The RT8886A
provides VR ready output signals. 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 RT8886A
is available in the WQFN-32L 4x4 small foot print package.
Features
Intel VR12.5 and VR12.6 Serial VID Interface
Compatible Power Management States
2/1 Phase PWM Controller with Dual Integrated
Drivers
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
Programmable DVID Slew Rate
DVID Enhancement
Small 32-Lead WQFN Package
RoHS Compliant and Halogen Free
Simplified Application Circuit
To PCH
To CPU
RT8886A
VR_RDY
PHASE1
VR_HOT
VCLK
VDIO
PHASE2
ALERT
MOSFET
MOSFET
VCORE
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8886A-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1









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RT8886A Даташит, Описание, Даташиты
RT8886A
Applications
VR12.5 and VR12.6 Intel Core Supply
Notebook Multi-phase CPU Core Supply
AVP Step-Down Converter
Marking Information
15= : Product Code
15=YM
DNN
YMDNN : Date Code
Ordering Information
RT8886A
Package Type
QW : WQFN-32L 4x4 (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.
Pin Configurations
(TOP VIEW)
UGATE2
BOOT2
EN
ISEN2P
ISEN2N
ISEN1N
ISEN1P
IMON
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4
GND
21
5 20
6 33 19
7 18
8 17
9 10 11 12 13 14 15 16
TONSET
VCLK
ALERT
VDIO
VR_HOT
TSEN
IBIAS
SET3
WQFN-32L 4x4
Functional Pin Description
Pin No.
Pin Name
Pin Function
3 EN
VR Enable Control Input.
6, 5 ISEN [1:2] N Negative Current Sense Inputs of Channel 1 and 2.
7, 4 ISEN [1:2] P Positive Current Sense Inputs of Channel 1 and 2.
8 IMON
CPU CORE Current Monitor Output. This pin outputs a voltage proportional to
the output current. Don’t connect a bypass capacitor from this pin to GND or the
VREF pin.
9 VREF
Fixed 0.6V Output Reference Voltage. This voltage is only used to offset the
output voltage of the IMON pin.
10 COMP
CORE VR Compensation Node. This pin is error amplifier output pin.
11 FB
Negative Input of the Error Amplifier. This pin is for output voltage feedback to
controller.
12 VSEN
VR Voltage Sense Input. This pin is connected to the terminal of VR output
voltage.
13 RGND
Return Ground for VR. This pin is the negative node of the differential remote
voltage sensing.
14 VCC
Supply Voltage Input. Connect this pin to 5V and place a decoupling capacitor
2.2F at least. The decoupling capacitor should be placed as close to the PWM
controller as possible.
15 SET1
1st Platform Setting. Platform can use this pin to set DVID compensation time,
RSET, DVID compensation width and OCS.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8886A-00 November 2013









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RT8886A Даташит, Описание, Даташиты
RT8886A
Pin No.
16
Pin Name
SET2
17 SET3
18 IBIAS
19 TSEN
20 VR_HOT
21 VDIO
22 ALERT
23 VCLK
24 TONSET
25
30
26, 2
27, 1
VR_RDY
PVCC
BOOT [1:2]
UGATE [1:2]
28, 32
PHASE [1:2]
29, 31
LGATE [1:2]
33
(Exposed Pad)
GND
Pin Function
2nd Platform Setting. Platform can use this pin to set ICCMAX, QRTH and
QRWIDTH.
3rd Platform Setting. Platform can use this to set Anti-ov ershoot function, zero
load-line, DVID slew rate, RSET selection at PS1, Anti-Overshoot enhancem ent
and ZCD threshold.
Internal Bias Current Setting. Connect a 100kresistor from this pin tied to
GND to set the internal current. Don’t connect a bypass pass capacitor from this
pin to GND.
Thermal Sense Input for CORE VR.
Thermal Monitor Output. (Active Low)
VR and CPU Data Transmission Interface.
SVID Alert. (Active Low).
Synchronous Clock from the CPU.
On-time Setting. An on-time setting resistor is connected from this pin to input
voltage.
VR Ready Indicator.
Driver Power. Connect this pin to GND by a minimum 2.2F ceramic capacitor.
Bootstrap Supply for High-Side Gate Driver.
High-Side Gate Drive Output. Connect the pin to the Gate of high-side MOSFET.
Switch Node of High-Side Driver. Connect the pin to high-side MOSFET Source
with the low-side MOSFET Drain and the inductor.
Low-Side Gate Drive Output. This pin drives the Gate of low-side MOSFET.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8886A-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3










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