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International Rectifier Electronic Components Datasheet

IR3628MPBF Datasheet

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

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IR3628MPBF pdf
Data Sheet No PD94725
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IR3628MPbF
HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Features
Internal 600kHz Oscillator
Operates with Single 5V or 12V Supply
Programmable Over Current Protection
Hiccup Current Limit Using MOSFET RDS(on)
sensing
Tracking for memory application
Precision Reference Voltage (0.6V)
Programmable Soft-Start
Pre-Bias Start-up
Thermal Protection
12-Lead 3x4mm MLPD Package
Applications
DDR Application
Storage Systems
Embedded Telecom Systems
Distributed Point of Load Power Architectures
Computing Peripheral Voltage Regulator
Graphics Card
General DC/DC Converters
Description
The IR3628 is a PWM controller designed for
high performance synchronous Buck DC/DC
applications. The IR3628 drives a pair of external
N-MOSFETs using a fixed 600kHz switching
frequency allowing the use of small external
components. The output voltage can be precisely
regulated using the internal 0.6V reference
voltage for low voltage applications. IR3628
provides an efficient solution for high-speed
bandwidth data bus which requires a particular
tracking scheme for best performance using the
uncommitted error amplifier.
Protection such as Pre-Bias startup, hiccup
current limit and thermal shutdown are provided
to give required system level security in the event
of fault conditions.
08/10/2007
Fig. 1: Typical application Circuit
ORDERING INFORMATION
PKG PACKAGE
DESIG DESCRIPTION
M IR3628MPBF
M IR3628MTRPBF
PIN
COUNT
12
12
PARTS
PER TUBE
122
--------
PARTS
PER REEL
-------
3000
T&R
ORIANTAION
Figure A


International Rectifier Electronic Components Datasheet

IR3628MPBF Datasheet

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

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IR3628MPBF pdf
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IR3628MPbF
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND)
• Vcc Supply Voltage ................................................… -0.5V to 16V
• Vc Supply Voltage …………………………………….. -0.5V to 30V
• Vref, Vp, Fb, Comp, SS …………..………………….. -0.3V to 3.5V
• OCset ………………………………………………… 10mA
• AGnd to PGnd ………………………………….…….. -0.3V to +0.3V
• Storage Temperature Range ..................................... -65°C To 150°C
• Operating Junction Temperature Range ................... -40°C To 150°C
• ESD Classification …………………………………..… JEDEC, JESD22-A114
• Moisture Sensitivity Level ……………………………. JEDEC Level 2 @ 260oC
Caution: Stresses beyond those listed under “Absolute Maximum Rating” 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 is not implied. Exposure to “Absolute Maximum
Rating” conditions for extended periods may affect device reliability.
Package Information
Vref 1
VCC 2
LDrv 3
PGnd 4
HDrv 5
VC 6
Exposed Pad
12 OCSet
11 SS/SD
10 Gnd
9 Comp
8 Fb
7 Vp
12-Lead MLPD, 3x4mm
ΘJA = 30o C/W *
ΘJC = 2o C/W
*Exposed pad on underside is connected to a copper
pad through vias for 4-layer PCB board design
08/10/2007
2


Part Number IR3628MPBF
Description HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Maker International Rectifier
Total Page 22 Pages
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