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PDF RT8862 Data sheet ( Hoja de datos )
| Número de pieza | RT8862 | |
| Descripción | Advanced 4/3/2/1-Phase PWM Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT8862
Advanced 4/3/2/1-Phase PWM Controller with Embedded
Drivers for CPU Core Power Supply
General Description
The RT8862 is an advanced 4/3/2/1-phase synchronous
buck controller with 2 integrated MOSFET drivers for Intel
VR11/VR10 and AMD K8/K8_M2 CPUs power application.
RT8862 adopts state-of-the-art dynamic phase control
capability. That achieves high efficiency over wide load
range. It uses differential inductor DCR current sense to
achieve phase current balance and active voltage
positioning. Other features include adjustable operating
frequency, adjustable soft start, power good indication,
external error-amp compensation, over voltage protection,
over current protection and enable/shutdown for various
application. RT8862 comes to a small footprint with
WQFN-48L 7x7 package.
Ordering Information
RT8862
Package Type
QW : WQFN-48L 7x7 (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.
Applications
z Desktop CPU Core Power
z Low Voltage, High Current DC/ DC Converter
Features
z Support Dynamic Phase Control
z 12V Power Supply Voltage
z 4/3/2/1-Phase Power Conversion
z 2 Embedded MOSFET Drivers
z Internal Regulated 5V Output
z VID table for INTEL VR11.1/VR10.x and AMD K8/
K8_M2 CPUs
z Continuous Differential Inductor DCR Current Sense
z Adjustable Soft Start
z Adjustable Frequency (300kHz typ.)
z Power Good Indication
z Adjustable Over Current Protection
z Over Voltage Protection
z VRHOT Sensing with External Thermistor
z IMON Output Current Indication
z Power State Indicator (PSI)
z Small 48-Lead WQFN Package
z RoHS Compliant and Halogen Free
Pin Configurations
(TOP VIEW)
FBRTN
QR1
QR2
SS/EN
COMP
FB
OFS
RT
ADJ
IMAX
IMAXPSI
IMONFB
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 32
6 31
7
GND
30
8 29
9 28
10 49 27
11 26
12 25
PWRGD
BOOT1
UGATE1
PHASE1
LGATE1
VCC12
LGATE2
PHASE2
UGATE2
BOOT2
PWM3
PWM4
13 14 15 16 17 18 19 20 21 22 23 24
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8862-02 January 2014
WQFN-48L 7x7
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT8862
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 Voltage
1 0 0 0 1 1 1 0 0.72500
1 0 0 0 1 1 1 1 0.71875
1 0 0 1 0 0 0 0 0.71250
1 0 0 1 0 0 0 1 0.70625
1 0 0 1 0 0 1 0 0.70000
1 0 0 1 0 0 1 1 0.69375
1 0 0 1 0 1 0 0 0.68750
1 0 0 1 0 1 0 1 0.68125
1 0 0 1 0 1 1 0 0.67500
1 0 0 1 0 1 1 1 0.66875
1 0 0 1 1 0 0 0 0.66250
1 0 0 1 1 0 0 1 0.65625
1 0 0 1 1 0 1 0 0.65000
1 0 0 1 1 0 1 1 0.64375
1 0 0 1 1 1 0 0 0.63750
1 0 0 1 1 1 0 1 0.63125
1 0 0 1 1 1 1 0 0.62500
1 0 0 1 1 1 1 1 0.61875
1 0 1 0 0 0 0 0 0.61250
1 0 1 0 0 0 0 1 0.60625
1 0 1 0 0 0 1 0 0.60000
1 0 1 0 0 0 1 1 0.59375
1 0 1 0 0 1 0 0 0.58750
1 0 1 0 0 1 0 1 0.58125
1 0 1 0 0 1 1 0 0.57500
1 0 1 0 0 1 1 1 0.56875
1 0 1 0 1 0 0 0 0.56250
1 0 1 0 1 0 0 1 0.55625
1 0 1 0 1 0 1 0 0.55000
1 0 1 0 1 0 1 1 0.54375
1 0 1 0 1 1 0 0 0.53750
1 0 1 0 1 1 0 1 0.53125
1 0 1 0 1 1 1 0 0.52500
1 0 1 0 1 1 1 1 0.51875
1 0 1 1 0 0 0 0 0.51250
1 0 1 1 0 0 0 1 0.50625
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 Voltage
1 0 1 1 0 0 1 0 0.50000
1 1 1 1 1 1 1 0 OFF
1 1 1 1 1 1 1 1 OFF
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8862-02 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
VID5
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
1
1
VID4
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
0
0
RT8862
Table 4. Output Voltage Program (K8_M2)
VID3
0
0
0
Pin Name
VID2
0
0
0
VID1
0
0
1
VID0
0
1
0
Nominal Output Voltage DACOUT
1.5500
1.5250
1.5000
0011
1.4750
0100
1.4500
0101
1.4250
0110
1.4000
0111
1.3750
1000
1.3500
1001
1.3250
1010
1.3000
1011
1.2750
1100
1.2500
1101
1.2250
1110
1.2000
1111
1.1750
0000
1.1500
0001
1.1250
0010
1.1000
0011
1.0750
0100
1.0500
0101
1.0250
0110
1.0000
0111
0.9750
1000
0.9500
1001
0.9250
1010
0.9000
1011
0.8750
1100
0.8500
1101
0.8250
1110
0.8000
1111
0.7750
0000
0.7625
0001
0.7500
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8862-02 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet RT8862.PDF ] | |
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