SupIRBuck

1
SupIRBuck Point-of-Load Voltage Regulators
PRESS RELEASE
DATA SHEETS
The IR3837M, IR3838M and IR3839M SupIRBuck
voltage regulators are tailored for
energy-efficient high performance server,
storage, telecom and Netcom applications offering
even greater efficiency and functionality over
previous generation devices for energy saving and
easy on-board implementation. New features
include single rail input voltage of 4.5V to 16V,
external reference for margining purposes,
internal digital soft-start, and external
synchronization, to reduce noise and EMI in
multi-rails systems. A /- 1 over-temperature
accurate 0.6V reference voltage is offered for
very precise regulation.
HI-RES GRAPHIC
SuPIRBuck PAGE

• Features
• Greater than 96 peak efficiency
• Single 4.5V - 16V application
• Wide output voltage range 0.6V to 0.9Vin
• Pin compatible solutions for 6A, 10A and 14A
• Programmable switch frequency up to 1.5MHz
• /- 1 accurate 0.6V reference voltage in 0 to
  125?C temperature range
• Internal digital soft-start
• Enable input with voltage monitoring capability
• Programmable Hiccup current limit
• Internal LDO for single 12V operation
• External synchronization
• Enhanced pre bias start up
• External reference for margining purposes
• Input for DDR tracking applications
• Integrated MOSFET drivers and bootstrap diode
• Operating junction temp -40?C lt Tj lt 125?C
• Thermal protection
• Power Good output for under-voltage and
  over-voltage detection with tracking capability

ON-LINE DESIGN TOOL

• Advantages
• The three new devices eliminate the need for
  traditional dual stage POL conversion and save
  energy, size and cost by operating directly from
  12 Vin.
• While optimized for 12V input voltage, superior
  efficiencies are also achieved in applications
  with 9.6V, 5V or 3.3V input voltages.
• As a result of programmable switching frequencies
  up to 1.5 MHz and small footprint, the new
  voltage regulators shrink size and cost, in
  addition to achieving higher power density.
• The common footprint of the devices provides
  design flexibility and allows cut-and-paste
  layout for fast time-to-market.
• The devices are configurable for DDR memory
  tracking or sequencing, and offer Power Good
  output for over-voltage and under-voltage
  detection with tracking capability
• The devices can operate directly from 12V and do
  not require 5V bias. However, 5V external bias
  option is offered to improve light load efficiency

October 2010