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International Rectifier Electronic Components Datasheet

IR3843AMPBF Datasheet

HIGHLY EFFICIENT INTEGRATED 3A SYNCHRONOUS BUCK REGULATOR

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IR3843AMPBF pdf
PD-97509
IR3843AMPbF
SupIRBuckTM
HIGHLY EFFICIENT
INTEGRATED 3A SYNCHRONOUS BUCK REGULATOR
Features
Wide Input Voltage Range 1.5V to 21V
Wide Output Voltage Range 0.7V to 0.9*Vin
Continuous 3A Load Capability
Integrated Bootstrap-diode
High Bandwidth E/A for excellent transient
performance
Programmable Switching Frequency up to 1.2MHz
Programmable Over Current Protection
PGood output
Hiccup Current Limit
Precision Reference Voltage (0.7V, +/-1%)
Programmable Soft-Start
Enable Input with Voltage Monitoring Capability
Enhanced Pre-Bias Start-up
Seq input for Tracking applications
-40oC to 125oC operating junction temperature
Thermal Protection
Multiple current ratings in pin compatible footprint
5mm x 6mm Power QFN Package, 0.9 mm height
Lead-free, halogen-free and RoHS compliant
Description
The IR3843A SupIRBuckTM is an easy-to-use,
fully integrated and highly efficient DC/DC
synchronous Buck regulator. The MOSFETs co-
packaged with the on-chip PWM controller make
IR3843A a space-efficient solution, providing
accurate power delivery for low output voltage
applications.
IR3843A is a versatile regulator which offers
programmability of start up time, switching
frequency and current limit while operating in
wide input and output voltage range.
The switching frequency is programmable from
250kHz to 1.2MHz for an optimum solution.
It also features important protection functions,
such as Pre-Bias startup, hiccup current limit and
thermal shutdown to give required system level
security in the event of fault conditions.
Applications
Server Applications
Storage Applications
Embedded Telecom Systems
Distributed Point of Load Power Architectures
Netcom Applications
Computing Peripheral Voltage Regulators
General DC-DC Converters
1.5V <Vin<16V
4.5V <Vcc<5.5V
PGood
Seq Enable
Vcc
PGood
Rt
SS/ SD Gnd
Vin Boot
SW
OCSet
Fb
Comp
PGnd
Vo
Rev 16.0
Fig. 1. Typical application diagram
1
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International Rectifier Electronic Components Datasheet

IR3843AMPBF Datasheet

HIGHLY EFFICIENT INTEGRATED 3A SYNCHRONOUS BUCK REGULATOR

No Preview Available !

IR3843AMPBF pdf
PD-97509
IR3843AMPbF
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND unless otherwise specified)
Vin ……………………………………………………. -0.3V to 25V
Vcc ……………….….…………….……..……….…… -0.3V to 8V (Note2)
Boot ……………………………………..……….…. -0.3V to 33V
SW …………………………………………..……… -0.3V to 25V(DC), -4V to 25V(AC, 100ns)
Boot to SW ……..…………………………….…..….. -0.3V to Vcc+0.3V (Note1)
OCSet ………………………………………….……. -0.3V to 30V, 30mA
Input / output Pins ……………………………….. ... -0.3V to Vcc+0.3V (Note1)
PGND to GND ……………...………………………….. -0.3V to +0.3V
Storage Temperature Range ................................... -55°C To 150°C
Junction Temperature Range ................................... -40°C To 150°C (Note2)
ESD Classification …………………………… ……… JEDEC Class 1C
Moisture sensitivity level………………...………………JEDEC Level 2@260 °C (Note5)
Note1: Must not exceed 8V
Note2: Vcc must not exceed 7.5V for Junction Temperature between -10oC and -40oC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress ratings only and functional operation of the device at these or any other
conditions beyond those indicated in the operational sections of the specifications are not implied.
PACKAGE INFORMATION
5mm x 6mm POWER QFN
SW
VIN 12
11 10 PGnd
θJA = 35oC / W
θJ-PCB = 2oC / W
Boot
Enable
13 15
Gnd
14
9 VCC
8 PGood
ORDERING INFORMATION
PACKAGE
DESIGNATOR
M
M
12 34567
Seq FB COMP Gnd Rt SS OCSet
PACKAGE
DESCRIPTION
IR3843AMTRPbF
IR3843AMTR1PbF
PIN
COUNT
15
15
PARTS PER
REEL
4000
750
Rev 16.0
2
Free Datasheet http://www.datasheet4u.com/


Part Number IR3843AMPBF
Description HIGHLY EFFICIENT INTEGRATED 3A SYNCHRONOUS BUCK REGULATOR
Maker International Rectifier
Total Page 30 Pages
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