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International Rectifier Electronic Components Datasheet

IR3087PBF Datasheet

XPHASETM PHASE IC

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IR3087PBF
DATA SHEET
XPHASETM PHASE IC WITH OPTI-PHASETM, OVP, AND OVERTEMP DETECT
DESCRIPTION
The IR3087 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 “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.
www.DataSheet4U.com The IR3087 with Opti-PhaseTM is intended for applications demanding increased efficiency under medium to
light load conditions. Both gate drivers will drive low at a programmable output current threshold. This
effectively disconnects the phase from the load eliminating power losses due to switching and circulating
currents.
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
Opti-PhaseTM reduces the number of phases for improved light to medium load efficiency
OVP comparator with 150ns response
Programmable Phase Over-Temperature Detection
Small thermally enhanced 20L MLPQ package
APPLICATION CIRCUIT
VGATE
12V
VRHOT
DAC
BIAS
5 Wire Analog Bus
From Control IC
RAMP
ISHARE
ROP1
ROP2
RBIASIN 20k
RCS-
CCS-
CCS+
RCS+
DBST
CBST
1 RMPIN+
2 RMPIN-
3 HOTSET
4 VRHOT
5 ISHARE
IR3087
PHASE
IC
VCCH
GATEH
PGND
GATEL
VCCL
15
14
13
12
11
L
CO
CIN
VO
CVCCL
RVCC
EA RPWMRMP
CSCOMP
CVCC
Page 1 of 35
1/31/05


International Rectifier Electronic Components Datasheet

IR3087PBF Datasheet

XPHASETM PHASE IC

No Preview Available !

ORDERING INFORMATION
Device
IR3087MTRPbF
IR3087MPbF
IR3087PBF
Order Quantity
3000 per reel
100 piece strips
www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
Operating Junction Temperature……………..150oC
Storage Temperature Range………………….-65oC to 150oC
ESD Rating……………………………………..HBM Class 1C JEDEC standard
PIN #
1
2
3
4
5
6
7
8
9
10
11
PIN NAME
RMPIN+
RMPIN-
HOTSET
VRHOT
ISHARE
SCOMP
EAIN
PWMRMP
LGND
VCC
VCCL
VMAX
20V
20V
20V
20V
20V
20V
20V
20V
n/a
24V
27V
VMIN
-0.3V
-0.3V
-0.3V
-0.3V
-0.3V
-0.3V
-0.3V
-0.3V
n/a
-0.3V
-0.3V
ISOURCE
1mA
1mA
1mA
1mA
5mA
1mA
1mA
1mA
50mA
n/a
n/a
12 GATEL
13 PGND
14 GATEH
15 VCCH
27V
0.3V
30V
30V
-0.3V DC, -2V for
100ns
-0.3V
-0.3V DC, -2V for
100ns
-0.3V
3A for 100ns,
200mA DC
3A for 100ns,
200mA DC
3A for 100ns,
200mA DC
n/a
16 CSIN+
17 CSIN-
18 OPTIPHS
19 DACIN
20 BIASIN
20V
20V
20V
20V
20V
-0.3V
-0.3V
-0.3V
-0.3V
-0.3V
1mA
1mA
1mA
1mA
1mA
ISINK
1mA
1mA
1mA
30mA
5mA
1mA
1mA
20mA
n/a
50mA
3A for 100ns,
200mA DC
3A for 100ns,
200mA DC
n/a
3A for 100ns,
200mA DC
3A for 100ns,
200mA DC
1mA
1mA
1mA
1mA
1mA
Page 2 of 35
1/31/05


Part Number IR3087PBF
Description XPHASETM PHASE IC
Maker International Rectifier
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