DCDC Converter
OPTIMOS IPOL
IR38263
Single-input Voltage, 30A Buck
Regulators with PVID
FEATURES
DESCRIPTION
Internal LDO allows single 16V operation
Output Voltage Range: 0.5V to 0.875*PVin
0.5% accurate Reference Voltage
Enhanced line/load regulation with Feedforward
Frequency programmable by PMBus up to 1.5 MHz
Enable input with Voltage Monitoring Capability
This family of OPTIMOS IPOL devices offers easy-to-use,
fully integrated and highly efficient DC/DC regulators with
PVID and I2C/PMBus interface. The on-chip PWM controller
and co-packaged low duty cycle optimized MOSFETs make
these devices a space-efficient solution, providing accurate
power delivery for low output voltage and high current
applications that require a parallel VID interface.
Remote Sense Amplifier with True Differential
Voltage Sensing
3 pins (PVID) to program output voltage
These versatile devices offer programmability of switching
frequency, output voltage, and fault/warning thresholds
and fault responses while operating over a wide input
range. Thus, they offer flexibility as well as system level
security in event of fault conditions.
Fast mode I2C and 400 kHz PMBus interface for
programming, sequencing and margining output
voltage, and for monitoring input voltage, output
voltage, output current and temperature.
PMBus configurable fault thresholds for input
UVLO, output OVP, OCP and thermal shutdown.
Thermally compensated pulse-by-pulse current
limit and Hiccup Mode Over Current Protection
Dedicated output voltage sensing for power good
indication and overvoltage protection which
remains active even when Enable is low.
The switching frequency is programmable from 150 kHz to
1.5 MHz for an optimum solution.
The on-chip sensors and ADC along with the PVID and
PMBus interfaces make it easy to monitor and report input
voltage, output voltage, output current and temperature.
Enhanced Pre-Bias Start up
Integrated MOSFET drivers and Bootstrap diode
Operating junction temp: -40oC<Tj<125oC
Thermal Shut Down
Post Package trimmed rising edge dead-time
PMBus Programmable Power Good Output
Small Size 5mmx7mm PQFN
Pb-Free (RoHS Compliant)
External resistor allows setting up to 16 PMBus
addresses
APPLICATIONS
Intel® VR13 and VR12.5 based systems
Servers and High End Desktop CPU VRs for non-
core applications
Telecom and storage applications
BASIC APPLICATION
For applications in which Pvin>14V, a 1 ohm resistor is required in series with the boot capacitor.
5.5V <Vin<16V
Optional placeholder for boot resistor.
Default should be 0 ohm
For PVin >14V, a 1 ohm resistor is
required
P1V8
PVin
Enable Vin
Boot
SW
Vo
Vcc/
LDO_out
Vsns
RS+
PGood
PGood
RS-
VIDSEL0
VIDSEL1
RSo
Fb
3 bit
PVID
VIDSEL2
ADDR
Comp
LGnd
PGnd
Placeholder
for capacitor
Figure 1: Typical application circuit
1
Rev 3.3
December 14, 2017