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IR3088AMPBFIORN/a557avaiXPHASE IC with Fault and Overtemp Detect
IR3088AMTRPBFIRN/a937avaiXPHASE IC with Fault and Overtemp Detect


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IR3088AMPBF-IR3088AMTRPBF
XPHASE IC with Fault and Overtemp Detect
International
TOR Rectifier IR3088APbF
DATA SHEET
XPHASETM PHASE IC WITH F AULT AND OVERTEMP DETECT
DESCRIPTION
The IR3088A Phase IC combined with an IR XPhazseTM Control IC provides a full featured and flexible way to
implement power solutions for the latest high performance CPUs and ASICs. 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 XPhaseTM architecture results in a power supply that is smaller, less
expensive, and easier to design while providing higher efficiency than conventional approaches.
The IR3088A 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-oft
Phase Fault Detection
Programmable Phase Over-Temperature Detection
Control FET driver's 25V input voltage capability simplifies boot-strap supply design
Small thermally enhanced 20L MLPQ package
APPLICATION CIRCUIT
PHASE FAULT
RBIASIN 20k
RPHASE1
PHSFLT
RMPIN+
RMPIN- IR3088A GATEH
HOTSET PHASE PGND
5 Wire Analog Bu
From Control IC
ISHARE ISHARE VCCL
PWMHMP
RPHASE2
RPHASES
CF‘WMHMF‘
Page 1 of 33 May 18, 2009

International
TOR Rectifier
IR3088APbF
ORDERING INFORMATION
Device Order Quantity
IR3088AMTR 3000
* IR3088AM 100 piece strips
* Samples only
ABSOLUTE MAXIMUM RATINGS
Operating Junction Temperature ................. 150°C
Storage Temperature Range ...................... -65°C to 150°C
ESD Rating ............................................. HBM Class 1C JEDEC standard
PIN tt PIN NAME VMAX VMIN lSOURCE ISINK
1 RMPIN+ 20V -0.31/ 1mA 1mA
2 RMPIN- 20V -0.31/ 1mA 1mA
3 HOTSET 20V -0.3V 1mA 1mA
4 VRHOT 20V -O.3V 1mA 30mA
5 ISHARE 20V -0.3V 5mA 5mA
6 SCOMP 20V -0.31/ 1mA 1mA
7 EAIN 20V -0.3V 1mA 1mA
8 PWMRMP 20V -0.3V 1mA 20mA
9 LGND n/a n/a 50mA n/a
10 VCC 24V -0.3V n/a 50mA
11 VCCL 27V -O.3V n/a 3A for 100ns,
200mA DC
12 GATEL 27V -0.3V DC, -2V for 3A for 100ns, 3A for 100ns,
100ns 200mA DC 200mA DC
13 PGND 0.3V -0.3V 3A for 100ns, n/a
200mA DC
14 GATEH 27V -0.3V DC, -2V for 3A for 100ns, 3A for 100ns,
100ns 200mA DC 200mA DC
15 VCCH 27V -0.3V n/a 3A for 100ns,
200mA DC
16 CSIN+ 20V -O.3V 1mA 1mA
17 CSIN- 20V -0.3V 1mA 1mA
18 PHSFLT 20V -0.3V 1mA 20mA
19 DACIN 20V -0.3V 1mA 1mA
20 BIASIN 20V -0.3V 1mA 1mA
Page 2 of 33 May 18, 2009

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