IR3623MPBF_1 Datasheet, PDF (1/26 Pages) International Rectifier – HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING

Data Sheet No.PD94717 revF
IR3623MPbF
HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP
DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING
Features
Description
• Dual Synchronous Controller with 180^o Out of Phase ^{The IR3623 IC is a high performance}
Operation
Synchronous Buck PWM Controller that can be
• Configurable to 2-Independent Outputs or Current ^{configured for two independent outputs or as a}
Share Single Output
current sharing single output. Since the IC does
• Output Voltage Tracking
• Power up /down Sequencing
not contain integrated MOSFET drivers it is ideal
for controlling iPOWIR^TM integrated power stage
• Current Sharing Using Inductor’s DCR
modules such as the iP2005 series of products.
• +/-1% Accurate Reference Voltage
• Programmable Switching Frequency up 1200kHz
• Programmable Over Current Protection
• Hiccup Current Limit Using MOSFET R_DS(on)
sensing
• Latched Overvoltage Protection
• Dual Programmable Soft-Starts
• Enable
• Pre-Bias Start-up
• Dual Power Good Outputs
• On Board Regulator
• External Frequency Synchronization
• Thermal Protection
• 32-Lead MLPQ Package
Applications
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Computing Peripheral Voltage Regulator
• Graphics Card
IR3623 enables output tracking and sequencing
of multiple rails in either ratiometric or
simultaneous fashion. The IR3623 features 180^o
out of phase operation which reduces the
required input/output capacitance. The switching
frequency is programmable from 200kHz to
1200kHz per phase by use of an external resistor
or the switching frequency can be synchronized
to an external clock signal. Other key features
offered by the IR3623 include; two independent
programmable soft starts, two independent power
good outputs, precision enable input and under
voltage lockout. The current limit is provided by
sensing the low side MOSFET's on-resistance for
optimum cost and performance. The output
voltages are monitored through dedicated pins to
protect against open circuit and to improve
response time to an overvoltage event.
• General DC/DC Converters
Vo1
Vo1
Vo2
Vo2
Ratiometric Powerup Ratiometric Powerdown
Vo1
Vo1
Vo2
Vo2
www.irf.com
Simultaneous Powerup Simultaneous Powerdown
Fig. 1: Power Up /Down Sequencing
ORDERING INFORMATION
PKG PACKAGE
DESIG DESCRIPTION
M
IR3623MPbF
PIN
PARTS PARTS
COUNT PER TUBE PER REEL
32
73
-------
M
IR3623MTRPbF
32
--------
3000
T&R
ORIANTAION
Fig A