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International Rectifier Electronic Components Datasheet

IR3550 Datasheet

60A Integrated PowIRstage

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60A Integrated PowIRstage® IR3550
FEATURES
Peak efficiency up to 95% at 1.2V
Integrated driver, control MOSFET, synchronous
MOSFET and Schottky diode
Input voltage (VIN) operating range up to 15V
Output voltage range from 0.25V to Vcc-2.5V, or to
5.5V if internal current sense amplifier is not used
Output current capability of 60A DC
Operation up to 1.0MHz
Integrated current sense amplifier
VCC under voltage lockout
Thermal flag
Body-Braking® load transient support
Diode-emulation high efficiency mode
Compatible with 3.3V PWM logic and VCC tolerant
Compliant with Intel DrMOS V4.0
PCB footprint compatible with IR3551 and IR3553
Efficient dual sided cooling
Small 6mm x 6mm x 0.9mm PQFN package
Lead free RoHS compliant package
APPLICATIONS
Voltage Regulators for CPUs, GPUs, and DDR
memory arrays
High current, low profile DC-DC converters
DESCRIPTION
The IR3550 integrated PowIRstage® is a synchronous buck
gate driver co-packed with a control MOSFET and a
synchronous MOSFET with integrated Schottky diode. It is
optimized internally for PCB layout, heat transfer and
driver/MOSFET timing. Custom designed gate driver and
MOSFET combination enables higher efficiency at lower
output voltages required by cutting edge CPU, GPU and
DDR memory designs.
Up to 1.0MHz switching frequency enables high
performance transient response, allowing miniaturization
of output inductors, as well as input and output capacitors
while maintaining industry leading efficiency. The IR3550’s
superior efficiency enables smallest size and lower solution
cost. The IR3550 PCB footprint is compatible with the
IR3551 (50A) and the IR3553 (40A).
Integrated current sense amplifier achieves superior
current sense accuracy and signal to noise ratio vs. best-in-
class controller based Inductor DCR sense methods.
The IR3550 incorporates the Body-Braking® feature which
enables reduction of output capacitors. Synchronous diode
emulation mode in the IR3550 removes the zero-current
detection burden from the PWM controller and increases
system light-load efficiency.
The IR3550 is optimized specifically for CPU core power
delivery in server applications. The ability to meet the
stringent requirements of the server market also makes
the IR3550 ideally suited to powering GPU and DDR
memory designs and other high current applications.
BASIC APPLICATION
VCC
4.5V to 7V
PHSFLT#
PWM
BBRK#
REFIN
IOUT
IR3550
VCC VIN
BOOST
PHSFLT#
PWM
BBRK#
REFIN
IOUT
LGND
SW
CSIN+
CSIN-
PGND
VIN
4.5V to 15V
VOUT
Figure 1: IR3550 Basic Application Circuit
1 July 16, 2014 | DATASHEET V3.2
95 20
93 18
91 16
89 14
87 12
85 10
83 8
81 6
79 4
77 2
75
0
0
5 10 15 20 25 30 35 40 45 50 55 60
Output Current (A)
Figure 2: Typical IR3550 Efficiency & Power Loss (See Note 2 on Page 8)


International Rectifier Electronic Components Datasheet

IR3550 Datasheet

60A Integrated PowIRstage

No Preview Available !

PINOUT DIAGRAM
60A Integrated PowIRstage® IR3550
ORDERING INFORMATION
Package
PQFN, 32 Lead
6mm x 6mm
Package
PQFN, 32 Lead
6mm x 6mm
Tape & Reel Qty
3000
Qty
100
Part Number
IR3550MTRPBF
Part Number
IR3550MPBF
Figure 3: IR3550 Pin Diagram, Top View
TYPICAL APPLICATION DIAGRAM
VCC
4.5V to 7V
R1
10k
PHSFLT#
PWM
BBRK#
Optional for
diode emulation
setup
REFIN
C8
1nF
IOUT
C3
1uF
IR3550
25 PHSFLT#
3
VCC
26 PWM
27 BBRK#
C9
22nF
28 LGND
29 REFIN
Gate
Drivers
and
Current
Sense
Amplifier
30 IOUT
TGND CSIN-
31 1
No Connect
CSIN+
2
18-23
VIN
C1
0.22uF
VIN
C2 4.5V to 15V
10uF x 2
24
BOOST
C5 L1
0.22uF 150nH
SW
6-15
C6 C7
22uF 470uF
VOUT
R2
2.49k
C4
0.22uF
PGND 16, 17
PGND 4
Figure 4: Application Circuit with Current Sense Amplifier
2 July 16, 2014 | DATASHEET V3.2


Part Number IR3550
Description 60A Integrated PowIRstage
Maker International Rectifier
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IR3550 Datasheet PDF






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