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International Rectifier Electronic Components Datasheet

IR3629A Datasheet

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

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Data Sheet No. PD94726
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IR3629/IR3629A MPbF
HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
WITH POWER GOOD OUTPUT
Features
Internal 600kHz Oscillator (300kHz “A version”)
Operates with Single 5V or 12V Supply
Programmable Over Current Protection
Hiccup Current Limit Using MOSFET RDS(on)
sensing
Precision Reference Voltage (0.6V)
Programmable Soft-Start
Programmable PGood output
Pre-Bias Start-up
Thermal Protection
12-Lead MLP Package
Applications
Distributed Point-of-Loads
Embedded Systems
Storage Systems
DDR Applications
Graphics Cards
Computing Peripheral Voltage Regulators
General DC-DC Converters
Description
The IR3629/IR3629A is a PWM controller
designed for high performance synchronous Buck
DC/DC applications. The IR3629/IR3629A drives
a pair of external N-MOSFETs using a fixed
600kHz (300kHz “A version”) 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. Protection such as Pre-Bias
startup, hiccup current limit and thermal shutdown
provide the required system level security in the
event of fault conditions.
11/26/2007
Fig. 1: Typical application Circuit
ORDERING INFORMATION
PKG PACKAGE
PIN
DESIG DESCRIPTION
COUNT
M IR3629/IR3629AMPBF 12
M IR3629/IR3629AMTRPBF 12
PARTS
PARTS
T&R
PER TUBE PER REEL ORIENTATION
122 -------
-------- 3000 Figure A


International Rectifier Electronic Components Datasheet

IR3629A Datasheet

HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER

No Preview Available !

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IR3629/IR3629A MPbF
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND)
• Vcc Supply Voltage ................................................… -0.5V to 16V
• Vc Supply Voltage …………………………………….. -0.5V to 30V
• PGood ………………………………………………… -0.5V to 16V
• 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
PGood 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 Vsns
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
11/26/2007
2


Part Number IR3629A
Description HIGH FREQUENCY SYNCHRONOUS PWM BUCK CONTROLLER
Maker International Rectifier
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IR3629A Datasheet PDF






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