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IR3084 Datasheet(PDF) 1 Page - International Rectifier

Part No. IR3084
Description  XPHASETM VR 10/11 CONTROL IC
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Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
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IR3084 Datasheet(HTML) 1 Page - International Rectifier

 
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IR3084
Page 1 of 45
07/20/2005
Data Sheet No. PD94718
XPHASETM VR 10/11 CONTROL IC
DESCRIPTION
The IR3084 Control IC combined with an IR XPhase
TM Phase IC provides a full featured and flexible
way to implement a complete VR10 or VR11 power solution. The “Control” IC provides overall system
control and interfaces with any number of “Phase” ICs which each drive and monitor a single phase of a
multiphase converter. The XPhase
TM
architecture results in a power supply that is smaller, less
expensive, and easier to design while providing higher efficiency than conventional approaches.
FEATURES
1 to X phase operation with matching Phase IC
Supports both VR11 8-bit VID code and extended VR10 7-bit VID code
0.5% Overall System Setpoint Accuracy
VID Select pin sets the DAC to either VR10 or VR11
VID Select pin selects either VR11 or legacy VR10 type startups
Programmable VID offset and Load Line output impedance
Programmable VID offset function at the Error Amp’s non-inverting input allowing zero offset
Programmable Dynamic VID Slew Rate
±300mV Differential Remote Sense
Programmable 150kHz to 1MHz oscillator
Enable Input with 0.85V threshold and 100mV of hysteresis
VR Ready output provides indication of proper operation and avoids false triggering
Phase IC Gate Driver Bias Regulator / VRHOT Comparator
Operates from 12V input with 9.9V Under-Voltage Lockout
6.9V/6mA Bias Regulator provides System Reference Voltage
Programmable Hiccup Over-Current Protection with Delay to prevent false triggering
Small thermally enhanced 5mm x 5mm, 28 pin MLPQ package
TYPICAL APPLICATION CIRCUIT
ROSC 30.1K
ROCSET
15.8K
RVSETPT
124
CSS/DEL
0.1uF
RFB1
162
C89
100pF
RCP
2.49K
RDRP
787
VSS_SENSE
CFB
10nF
CCP1
100pF
OUTEN
VID0
+5.0V
VID1
VID3
VID2
RVGDRV
97.6K
VID4
VID5
VR_RDY
VID6
VREG_12V_FILTERED
VID7
EA
CCP
56nF
R137
2K
VID_SEL
ISHARE
R117
1.21K
RMP
CVGDRV
10nF
CVDAC
33nF
RVDAC
3.5
VDAC
C1009
100pF
R30
10
C130
0.1uF
C134
0.1uF
VID5
4
VID0
9
VID1
8
VID2
7
VID3
6
VID4
5
RMPOUT
19
LGND
22
VDAC
12
SS/DEL
26
ENABLE
28
VOSNS--
10
FB
17
REGDRV
24
ROSC
11
REGSET
25
VDRP
16
IIN
15
EAOUT
18
VCC
21
VID6
3
VID7
2
VRRDY
27
VSETPT
14
VIDSEL
1
VBIAS
20
REGFB
23
OCSET
13
IR3084MTR
RFB
324
RT2
4.7K, B=4450
VCC_SENSE
VREG_12V_FILTERED
C204
0.1uF
Q4
CJD200
R1331
1
C135
1uF
VGDRIVE
VBIAS


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