IR3502B Datasheet, PDF (1/38 Pages) International Rectifier – XPHASE3TM CONTROL IC

IR3502B
DATA SHEET
XPHASE3^TM CONTROL IC
DESCRIPTION
The IR3502B control IC combined with an XPHASE3^TM Phase IC provides a full featured and flexible way
to implement a complete VR11.0 and VR11.1 power solution. The IR3502B provides overall system control
and interfaces with any number of Phase ICs, each driving and monitoring a single phase. The XPhase3^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
 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
 Small thermally enhanced 32L 5mm x 5mm MLPQ package
 RoHS Compliant
ORDERING INFORMATION
Device
IR3502BMTRPBF
* IR3502BMPBF
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 38
V3.2