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International Rectifier Electronic Components Datasheet

IR3502 Datasheet

CONTROLLER

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IR3502
DATA SHEET
XPHASE3TM CONTROL IC
DESCRIPTION
The IR3502 control IC combined with an XPHASE3TM Phase IC provides a full featured and flexible way to
implement a complete VR11.0 and VR11.1 power solution. The IR3502 provides overall system control
and interfaces with any number of Phase ICs, each driving and monitoring a single phase. The XPhase3TM
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
0.5% overall system set point accuracy
Daisy-chain digital phase timing provides accurate phase interleaving without external components
Programmable 250kHz to 9MHz clock oscillator frequency provides per phase switching frequency of
250kHz to 1.5MHz
Programmable Dynamic VID Slew Rate
Programmable VID Offset or No Offset
Programmable Load Line Output Impedance
High speed error amplifier with wide bandwidth of 30MHz and fast slew rate of 10V/us
Programmable constant converter output current limit during soft start
Hiccup over current protection with delay during normal operation
Central over voltage detection and latch with programmable threshold and communication to phase ICs
Over voltage signal output to system with overvoltage detection during powerup and normal operation
Load current reporting
Single NTC thermistor compensation for correct current reporting, OC Threshold, and Droop
Detection and protection of open remote sense line
Open control loop protection
IC bias linear regulator controller
Programmable VRHOT function monitors temperature of power stage through a NTC thermistor
Remote sense amplifier with true converter voltage sensing
Simplified VR Ready (VRRDY) output provides indication of proper operation
Small thermally enhanced 32L 5mm x 5mm MLPQ package
RoHS compliant
ORDERING INFORMATION
Device
IR3502MTRPBF
* IR3502MPBF
Package
32 Lead MLPQ
(5 x 5 mm body)
32 Lead MLPQ
(5 x 5 mm body)
Order Quantity
3000 per reel
100 piece strips
Samples only
Page 1 of 39
July 28, 2009


International Rectifier Electronic Components Datasheet

IR3502 Datasheet

CONTROLLER

No Preview Available !

APPLICATION CIRCUIT
IR3502
1 VID7
2 VID6
3 VID5
4 VID4
5 VID3
6 VID2
7 VID1
8 VID0
IR3500
LGND
ROSC / OVP
SS/DEL
VDAC
OCSET
VSETPT
IIN
VDRP
24
23
22
21
20
19
18
17
1 VID7
2 VID6
3 VID5
4 VID4
5 VID3
6 VID2
7 VID1
8 VID0
IR3502
GND
ROSC
SS/DEL
VDAC
VSETPT
VDAC_BUFF
VN
VDRP
24
23
22
21
20
19
18
17
Figure 1 – PIN difference between IR3500 and IR3502
+12V
VRRDY
IOUT
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
ENABLE
VRHOT
Q2
RVCCLDRV
CVCCL
RMON
CMON
RMON1
VOSEN-
1
VID7
2 VID6
3 VID5
4 VID4
5 VID3
6 VID2
7 VID1
8 VID0
IR3502
GND
ROSC
SS/DEL
VDAC
VSETPT
VDAC_BUFF
VN
VDRP
24
23
22
21
20
19
18
17
ROSC
RVDAC
RVSETPT
RTCMP3
CSS/DEL
CVDAC
RTCMP1
RTHERM
RHOTSET1
RHOTSET3
RTCMP2
RDRP
CHOTSET
RHOTSET2
RFB1
CFB1
RFB
REA CEA
CEA1
Page 2 of 39
Figure 2 – IR3502 Application Circuit
12V
VCCL
IIN
PHSIN
PHSOUT
CLKOUT
VDAC
EAOUT
VOSEN+
VOSEN-
July 28, 2009


Part Number IR3502
Description CONTROLLER
Maker International Rectifier
PDF Download

IR3502 Datasheet PDF






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