IR3552_15 Datasheet, PDF (1/23 Pages) International Rectifier – 40A Integrated PowIRstage

40A Integrated PowIRstage^® _IR3552
FEATURES
• Peak efficiency up to 94.5% at 12VIN to
1.8VOUT, 93.3% at 1.2VOUT
• 40A PowIRstage^® includes: Integrated Driver,
Control MOSFET, Synchronous MOSFET and
Schottky Diode
• <1uA Disabled ICC Bias Current
• <500uA Enabled ICC Bias Current
• Input voltage (VIN) range of 4.5V to 17V with
available 14:1 VIN_DIV monitor pin
• Flexible Drive Voltage (VDRV) from 4.5V to
13.2V to optimize converter efficiency
• Integrated bootstrap PFET for improved high
side MOSFET enhancement
• VDRV under voltage lockout protection
• 5V VCC with under voltage lockout protection
• Switching frequency up to 1.5MHz
• Over-temperature TFAULT alert flag with
internal temperature exceeds 150°C
• MODE pin selectable 3.3V tri-state PWM logic
or IR Active Tri-Level (ATL) PWM logic
• Efficient dual sided cooling
• Small 4mm x 6 mm x 0.9mm PQFN package
• Lead-free RoHS compliant package
APPLICATIONS
• High current solutions with true sleep
requirements
• High frequency, low profile DC-DC converters
• Voltage Regulators for CPUs, GPUs, and DDR
memory arrays
DESCRIPTION
The IR3552 integrated PowIRstage™ contains a low
quiescent current synchronous buck gate driver IC
which is co-packed with control and synchronous
MOSFETs and low side Schottky diode to further
improve efficiency. The package is optimized for PCB
layout, heat transfer, driver/MOSFET control timing,
and minimal switch node ringing when layout
guidelines are followed. The paired gate driver and
MOSFET combination enables higher efficiency at
lower output voltages required by cutting edge CPU,
GPU and DDR memory designs.
The IR3552 also supports <1uA disabled ICC bias
current when the ENABLE pin is pulled low. This
feature supports ultra-low or “near-off” power
shutdown requirements of battery powered devices.
1.5MHz 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 IR3552’s superior efficiency
enables smallest size and lower solution cost.
The IR3552 provides two selectable PWM logic
modes, the regular 3.3V tri-state PWM logic or
International Rectifier’s Active Tri-Level (ATL) PWM
logic. The ATL PWM logic eliminates a dedicated
Body-braking^TM pin and improves the transient
response of the converter during load release.
The IR3552 provides a thermal warning output set to
150°C, which makes it possible to protect critical
circuits on the PCB.
ORDERING INFORMATION
Base Part Number Package Type
IR3552MTRPBF PQFN 4 mm x 6 mm
Standard Pack
Form
Quantity
Tape and Reel
3000
Orderable Part Number
IR3552MTRPBF
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February 19, 2014 | FINAL