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PDF RT8802A Data sheet ( Hoja de datos )
| Número de pieza | RT8802A | |
| Descripción | 2/3/4/5-Phase PWM Controller | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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RT8802A
2/3/4/5-Phase PWM Controller for High-Density Power Supply
General Description
The RT8802Ais a 2/3/4/5-phase synchronous buck controller
specifically designed to power Intel®/ AMD next generation
microprocessors. It implements an internal 8-bit DAC that is
identified by VID code of microprocessor directly. RT8802A
generates VID table that conform to Intel® VRD10.x and
www.DataSVheReDt41U1.cocmore power with 6.25mV increments and 0.5%
accuracy.
RT8802Aadopts innovative time-sharingDCR current sensing
technique to sense phase currents for phase current balance,
load line setting and over current protection. Using a common
GM to sense all phase currents eliminates offset and linearity
variation between GMs in conventional current sensing
methods. As sub-milli-ohm-grade inductors are widely used
in modern motherboards, slight offset and linearity mismatch
will cause considerable current shift between phases. This
technique ensures good current balance in mass production.
Other features include over current protection, programmable
soft start, over voltage protection, and output offset setting.
RT8802A comes to a small footprint package with
VQFN-40L 6x6.
Ordering Information
RT8802A
Package Type
QV : VQFN-40L 6x6 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richtek Pb-free and Green 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.
`100% matte tin (Sn) plating.
Features
z 5V Power Supply
z 2/3/4/5-Phase Power Conversion with Automatic
Phase Selection
z 8-bit VID Interface, Supporting Intel VRD11/VRD10.x
and AMD K8, K8_M2 CPUs
z VR_HOT and VR_FAN Indication
z Precision Core Voltage Regulation
z Power Stage Thermal Balance by DCR Current
Sensing
z Adjustable Soft-start
z Over-Voltage Protection
z Adjustable Frequency and Typical at 300kHz per
Phase
z Power Good Indication
z 40-Lead VQFN Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Intel®/AMDNew generation microprocessor for Desktop
PC and Motherboard
z Low Output Voltage, High power density DC-DC
Converters
z Voltage Regulator Modules
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
VTT/EN
VR_Ready
FBRTN
FB
1
2
3
4
30 PWM5
29 PWM4
28 PWM3
27 PWM2
COMP 5
SS 6
QRSEL 7
VR_FAN 8
VR_HOT 9
TSEN 10
GND
41
26 PWM1
25 ISP1
24 ISP2
23 ISP3
22 ISP4
21 ISP5
11 12 13 14 15 16 17 18 19 20
VQFN-40L 6x6
DS8802A-04 August 2007
All brandname or trademark belong to their owner respectively
www.richtek.com
1
1 page  
RT8802A
Table 1. Output Voltage Program (VRD10.x + VID6)
VID4 VID3
Pin Name
VID2
VID1
VID0
VID5
Nominal Output Voltage DACOUT
VID6
01 0 1 0 1 1
1.60000V
01 0 1 0 1 0
1.59375V
01 0 1 1 0 1
1.58750V
01 0 1 1 0 0
1.58125V
01 0 1 1 1 1
1.57500V
01 0 1 1 1 0
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01 1 0 0 0 1
1.56875V
1.56250V
01 1 0 0 0 0
1.55625V
01 1 0 0 1 1
1.55000V
01 1 0 0 1 0
1.54375V
01 1 0 1 0 1
1.53750V
01 1 0 1 0 0
1.53125V
01 1 0 1 1 1
1.52500V
01 1 0 1 1 0
1.51875V
01 1 1 0 0 1
1.51250V
01 1 1 0 0 0
1.50625V
01 1 1 0 1 1
1.50000V
01 1 1 0 1 0
1.49375V
01 1 1 1 0 1
1.48750V
01 1 1 1 0 0
1.48125V
01 1 1 1 1 1
1.47500V
01 1 1 1 1 0
1.46875V
10 0 0 0 0 1
1.46250V
10 0 0 0 0 0
1.45625V
10 0 0 0 1 1
1.45000V
10 0 0 0 1 0
1.44375V
10 0 0 1 0 1
1.43750V
10 0 0 1 0 0
1.43125V
10 0 0 1 1 1
1.42500V
10 0 0 1 1 0
1.41875V
10 0 1 0 0 1
1.41250V
10 0 1 0 0 0
1.40625V
10 0 1 0 1 1
1.40000V
10 0 1 0 1 0
1.39375V
10 0 1 1 0 1
1.38750V
10 0 1 1 0 0
1.38125V
10 0 1 1 1 1
1.37500V
10 0 1 1 1 0
1.36875V
10 1 0 0 0 1
1.36250V
All brandname or trademark belong to their owner respectively
To be continued
DS8802A-04 August 2007
www.richtek.com
5
5 Page 
RT8802A
Table 2. Output Voltage Program (VRD11)
Pin Name
Nominal Output Voltage DACOUT
HEX
9C 0.63750V
9D 0.63125V
9E 0.62500V
9F 0.61875V
A0 0.61250V
A1
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0.60625V
0.60000V
A3 0.59375V
A4 0.58750V
A5 0.58125V
A6 0.57500V
A7 0.56875V
A8 0.56250V
A9 0.55625V
AA 0.55000V
AB 0.54375V
AC 0.53750V
AD 0.53125V
AE 0.52500V
AF 0.51875V
B0 0.51250V
B1 0.50625V
B2 0.50000V
B3 X
B4 X
B5 X
B6 X
B7 X
B8 X
B9 X
BA X
BB X
BC X
BD X
BE X
BF X
C0 X
C1 X
C2 X
Pin Name
Nominal Output Voltage DACOUT
HEX
C3 X
C4 X
C5 X
C6 X
C7 X
C8 X
C9 X
CA X
CB X
CC X
CD X
CE X
CF X
D0 X
D1 X
D2 X
D3 X
D4 X
D5 X
D6 X
D7 X
D8 X
D9 X
DA X
DB X
DC X
DD X
DE X
DF X
E0 X
E1 X
E2 X
E3 X
E4 X
E5 X
E6 X
E7 X
E8 X
E9 X
DS8802A-04 August 2007
All brandname or trademark belong to their owner respectively
To be continued
www.richtek.com
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet RT8802A.PDF ] | |
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