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International Rectifier Electronic Components Datasheet

IR3558 Datasheet

45A Integrated PowIRstage

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45A Integrated PowIRstage® IR3558
FEATURES
Peak efficiency up to 94.0% at 1.2V
Integrated driver, control MOSFET, synchronous
MOSFET and Schottky diode
Input voltage (VIN) operating range of 4.5V to 15V
Separate LVCC and HVCC from 4.5V to 13.2V to
optimize converter efficiency
Output current capability of 45A DC
Switching frequency up to 1.0MHz
Programmable thermal flag threshold from 70°C to
150°C
5V VCC with under voltage lockout
Low quiescent current
Enable control
Selectable regular 3.3V tri-state PWM logic or IR
Active Tri-Level (ATL) PWM logic
PCB footprint compatible with most IR3551 pins
Efficient dual sided cooling
Small 5mm 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 IR3558 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 fast transient
response, allowing miniaturization of output inductors as
well as input and output capacitors while maintaining high
efficiency. The IR3558’s superior efficiency enables
smallest size and lower solution cost. The IR3558 PCB
footprint is compatible with most pins of the IR3551 (50A).
The IR3558 provides two selectable PWM logic modes, the
3.3V tri-state PWM logic or International Rectifier’s Active
Tri-LevelTM (ATL) PWM logic. The ATL PWM logic eliminates
a dedicated Body-Braking® pin and improves the transient
response of the converter during load release.
The IR3558 provides a thermal flag output with
programmable threshold from 70°C to 150°C, which makes
it possible to adjust the thermal protection threshold
based on the PCB layout and thermal distribution.
The IR3558 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 IR3558 ideally suited to powering GPU and DDR
memory designs and other high current applications.
BASIC APPLICATION
VCC
5V
OT#
PWM
ENABLE
PVCC
4.5V to 13.2V
VCC
IR3558 VIN
LGND
OT#
BOOST
OTSET
PWM
SW
EN
MODE
HVCC
LVCC
PGND
VIN
4.5V to 15V
VOUT
CS+ CS-
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
Output Current (A)
Figure 1: IR3558 Basic Application Circuit
Figure 2: Typical IR3558 Efficiency & Power Loss (See Note 2 on Page 7)
1 September 10, 2012 | FINAL DATASHEET


International Rectifier Electronic Components Datasheet

IR3558 Datasheet

45A Integrated PowIRstage

No Preview Available !

PINOUT DIAGRAM
45A Integrated PowIRstage® IR3558
ORDERING INFORMATION
Package
PQFN, 28 Lead
5mm x 6mm
Tape & Reel Qty
4000
Part Number
IR3558MTRPBF
Figure 3: IR3558 Pin Diagram, Top View
TYPICAL APPLICATION DIAGRAM
VCC
4.5V to 5.5V
R1
10k
OT#
PWM
ENABLE
MODE
OTSET
PVCC
4.5V to 13.2V
C3
0.1uF
IR3558
21 OT#
1
VCC
22 PWM
23 EN
25 MODE
26 OTSET
2 LVCC
Gate
Drivers
and
Over
Temperat-
ure
Detection
3 HVCC
C4
1uF
LGND
24
16-19
VIN
C1
0.1uF
VIN
C2 4.5V to 15V
10uF x 2
20
BOOST
C5 L1
0.22uF 150nH
SW
6-13
C7 C8
22uF 470uF
VOUT
PGND 14, 15
PGND 4, 27
R2
2.49k
C6
0.22uF
CS+ CS-
Figure 4: Application Circuit
2 September 10, 2012 | FINAL DATASHEET


Part Number IR3558
Description 45A Integrated PowIRstage
Maker International Rectifier
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IR3558 Datasheet PDF






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