ISL8271M Datasheet, PDF (1/51 Pages) Intersil Corporation – Digital DC/DC PMBus 33A Module

DATASHEET
Digital DC/DC PMBus 33A Module
ISL8271M
The ISL8271M is a 33A step-down DC/DC power supply module
with integrated digital PWM controller, synchronous power
switches, an inductor and passives. Only bulk input and output
capacitors are needed to finish the design. The 33A of
continuous output current can be delivered without a need of
airflow or a heatsink. The thermally enhanced HDA module is
capable of dissipating heat directly into the PCB.
The ISL8271M uses ChargeMode™ control architecture, which
responds to a transient load within a single switching cycle.
The ISL8271M comes with a preprogrammed configuration for
operating in a pin strap mode; output voltage, switching
frequency and device SMBus address can be programmed
with external resistors. More configuration such as soft-start
and fault limits can be easily programmed or changed via
PMBus compliant serial bus interface. PMBus can be used to
monitor voltages, current, temperatures and fault status. The
ISL8271M is supported by PowerNavigator™ software, a
graphical user interface (GUI) that can be used to configure
modules to a desired solution.
The ISL8271M is available in a 40-pin compact 17mmx19mm
HDA module with very low profile height of 3.55mm, suitable
for automated assembly by standard surface mount
equipment. The ISL8271M is RoHS compliant by exemption.
Features
• Complete digital switch mode power supply
- Wide V_IN range: 4.5V to 14V
- Programmable V_OUT range: 0.6V to 5V
• PMBus compliant I²C communication interface
- Programmable V_OUT, margining, UV/OV, I_OUT limit,
soft-start/stop, sequencing and external synchronization
- Monitor: V_IN, V_OUT, I_OUT, temperature, duty cycle,
switching frequency and faults
• ChargeMode control architecture
• ±1.0% V_OUT accuracy over line, load and temperature
• Power-Good indicator
• Over-temperature protection
• Internal nonvolatile memory and fault logging
• Patented thermally enhanced HDA package
Applications
• Server, telecom, storage and datacom
• Industrial/ATE and networking equipment
• General purpose power for ASIC, FPGA, DSP and memory
Related Literature
• AN1925, “ISL8271MEVAL1Z Evaluation Board User Guide”
VIN
2.2
1µ
C_IN
10µ
V_IN
V_DD
ISL8271M
V_DRVIN
V_DRVOUT
V_OUT
V_SEN+
V_SEN-
SCL
SDA
SALRT
SGND
PGND
V_OUT
C_OUT
19mm
3.55mm
17mm
NOTE:
1. Only bulk input and output capacitors are required to finish the design.
FIGURE 1. A COMPLETE DIGITAL SWITCH MODE POWER SUPPLY
FIGURE 2. A SMALL PACKAGE FOR HIGH POWER DENSITY
December 18, 2014
1
FN8636.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design), ChargeMode, PowerNavigator and Digital-DC are trademarks owned by Intersil Corporation
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