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International Rectifier Electronic Components Datasheet

IR3856WMPBF Datasheet

SYNCHRONOUS BUCK REGULATOR

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PD-97506
IR3856WMPbF
SupIRBuckTM
HIGHLY EFFICIENT
INTEGRATED 6A, SYNCHRONOUS BUCK REGULATOR
Features
Greater than 95% Maximum Efficiency
Wide Input Voltage Range 1.5V to 16V
Wide Output Voltage Range 0.7V to 0.9*Vin
Continuous 6A Load Capability
Integrated Bootstrap-diode
High Bandwidth E/A for excellent transient
performance
Programmable Switching Frequency up to 1.5MHz
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
4mm x 5mm Power QFN Package
Halogen Free, Lead Free and RoHS compliant
Applications
Server Applications
Storage Applications
Embedded Telecom Systems
Distributed Point of Load Power Architectures
Description
The IR3856W 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
IR3856W a space-efficient solution, providing
accurate power delivery for low output voltage
applications.
IR3856W 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 1.5MHz 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.
Netcom Applications
Computing Peripheral Voltage Regulators
General DC-DC Converters
Rev 9.0
Fig. 1. Typical application diagram
1
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International Rectifier Electronic Components Datasheet

IR3856WMPBF Datasheet

SYNCHRONOUS BUCK REGULATOR

No Preview Available !

PD-97506
IR3856WMPbF
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND unless otherwise specified)
Vin ……………………………………….……………. -0.3V to 25V
PVcc, 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 (Max 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 3@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
4mm x 5mm POWER QFN
13
VIN
Boot
Enable
Seq
14
15
16
12
SW
17
Gnd
11
PGnd
θ JA( Sync _ FET ) = 45 o C / W *
θ JA( Ctrl _ FET ) = 45 o C / W *
θ J -PCB = 2o C / W
* Exposed pads on underside
are connected to copper
10
PVcc
pads of 4-layer (2 oz.) PCB
board design
9 VCC
8 PGood
ORDERING INFORMATION
12 34567
Fb NC COMP Gnd Rt SS/SD OCSet
PACKAGE
DESIGNATOR
M
M
PACKAGE
DESCRIPTION
IR3856WMTRPbF
IR3856WMTR1PbF
PIN COUNT
17
17
PARTS PER
REEL
4000
750
Rev 9.0
2
Free Datasheet http://www.Datasheet4U.com


Part Number IR3856WMPBF
Description SYNCHRONOUS BUCK REGULATOR
Maker International Rectifier
Total Page 30 Pages
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