|
IR3502_09 Datasheet, PDF (1/39 Pages) International Rectifier – XPHASE3TM CONTROL IC | |||
|
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
|
▷ |