IR3080PBF Datasheet, PDF (1/41 Pages) International Rectifier – XPHASETM VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT

Data Sheet No. PD94705 revB
IR3080PbF
XPHASE^TM VRD10 CONTROL IC WITH VCCVID & OVERTEMP DETECT
DESCRIPTION
The IR3080 Control IC combined with an IR XPhase^TM Phase IC provides a full featured and flexible way to
implement a complete VRD 10 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.
The IR3080 is intended for desktop applications and includes the VCCVID and VRHOT functions required
for proper system operation.
FEATURES
• 6 bit VR10 compatible VID with 0.5% overall system accuracy
• 1 to X phases operation with matching phase ICs
• On-chip 700Ω VID Pull-up resistors with VID pull-up voltage input
• Programmable Dynamic VID Slew Rate
• No Discharge of output capacitors during Dynamic VID step-down (can be disabled)
• +/-300mV Differential Remote Sense
• Programmable 150kHz to 1MHz oscillator
• Programmable VID Offset and Load Line output impedance
• Programmable Softstart
• Programmable Hiccup Over-Current Protection with Delay to prevent false triggering
• Simplified Powergood provides indication of proper operation and avoids false triggering
• Operates from 12V input with 9.1V Under-Voltage Lockout
• 6.8V/5mA Bias Regulator provides System Reference Voltage
• 1.2V @ 150mA VCCVID Linear Regulator with Full Protection
• VCCVID Powergood with Programmable delay gates converter operation
• Programmable Converter Over-Temperature Detection and Output
• Small thermally enhanced 32L MLPQ package
APPLICATION CIRCUIT
12V
VRHOT
POWERGOOD
VID POWERGOOD
RVCC
10 ohm
CVCC
0.1uF
RHOTSET2
Page 1
VCCVID
3.3V
VID5
VID0
VID1
VID2
VID3
VID4
RHOTSET1
1
VIDFB
2
VCCVID
3 _VIDPWR
4 _VID5
5 _VID0
6
VID1
7 _VID2
8 _VID3
IR3080
CONTROL
IC
VCC ²⁴
VBIAS ²³
22
BBFB
EAOUT ²¹
FB ²⁰
VDRP ¹⁹
18
IIN
OCSET ¹⁷
0.1uF
RCP
CCP
RDRP1 CDRP
RDRP
CCP1
ROSC
ROCSET
RVDAC
CVDAC
CFB
RFB1 RFB
RMPOUT
VBIAS
EA
5 Wire Analog Bus
to Phase ICs
ISHARE
VDAC
VOSENSE+ _{Remote Sense}
VOSENSE-