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IR3088APBF Datasheet, PDF (1/34 Pages) International Rectifier – XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT | |||
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DATA SHEET No.94704
IR3088APbF
XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT
DESCRIPTION
The IR3088APbF Phase IC combined with an IR XPhaseTM Control IC provides a full featured and flexible
way to implement power solutions for the latest high performance CPUs and ASICs. The âControlâ IC
provides overall system control and interfaces with any number of âPhaseâ ICs which each drive and monitor
a single phase of a multiphase converter. The XPhaseTM architecture results in a power supply that is
smaller, less expensive, and easier to design while providing higher efficiency than conventional
approaches.
The IR3088APbF is intended for the following application conditions;
⢠Excessive impedance between converter and load
⢠Output voltage exceeding the control IC reference/VID voltage is desired
FEATURES
⢠2.5A Average Gate Drive Current
⢠Loss-Less Inductor Current Sense
⢠Internal Inductor DCR Temperature Compensation
⢠Programmable Phase Delay
⢠Programmable Feed-Forward Voltage Mode PWM Ramp
⢠Sub 100ns Minimum Pulse Width supports 1MHz per-phase operation
⢠Current Sense Amplifier drives a single wire Average Current Share Bus
⢠Current Share Amplifier reduces PWM Ramp slope to ensure sharing between phases
⢠Body BrakingTM disables Synchronous MOSFET for improved transient response and prevents negative
output voltage at converter turn-off
⢠Phase Fault Detection
⢠Programmable Phase Over-Temperature Detection
⢠Control FET driverâs 25V input voltage capability simplifies boot-strap supply design
⢠Small thermally enhanced 20L MLPQ package
PACKAGE PINOUT
1 RMPIN+
2
RMPIN-
3 HOTSET
4 VRHOT
5 ISHARE
IR3088A
PHASE
IC
VCCH 15
14
GATEH
PGND 13
GATEL 12
VCCL 11
Page 1 of 34
1/28/2005
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