SupIRBuck

1
SupIRBuck Point-of-Load Voltage Regulators in a
Compact 4x5 mm Package
PRESS RELEASE
DATA SHEETS
HI-RES GRAPHIC
The IR3853, IR3856 and IR3859 SupIRBuck voltage
regulators integrate a high performance
controller with latest generation MOSFETs in a
slim 4 x 5 mm PQFN package and deliver 4A, 6A and
9A output current respectively to achieve more
than 96 percent peak efficiency. The devices,
tailored for energy-efficient server, storage,
telecom, Netcom and set-top box applications
offer the same efficiency and functionality as
previous generation devices in a 33 percent
smaller footprint. New features include Over
Voltage Protection (OVP), external
synchronization and optional output voltage
monitoring input for adjustable PGOOD and OVP
threshold setting.
SuPIRBuck PAGE

• Features
• Greater than 96 peak efficiency
• Pin compatible solutions for 4A, 6A and 9A
• Wide input voltage range 1.5V to 21V (with 5V
  Bias)
• Wide output voltage range 0.7V to 90 of the
  input voltage
• Integrated bootstrap diode, cont FET and Sync
  FETKY
• High bandwidth E/A for excellent transient
  performance
• Programmable frequency up to 1.5MHz
• 1 accurate 0.7V reference voltage in 0-125?C
  temp range
• Programmable hiccup current limit
• Programmable soft start
• Enhanced pre-bias start up
• Thermal protection
• Enable pin with voltage monitoring capability
• Power Good output for Over-voltage and
  Under-voltage detection
• Sequencing for simultaneous power-up/down of
  different rails
• Over Voltage Protection
• Optional output voltage monitoring input for
  adjustable PGOOD and OVP threshold setting
• External synchronization

ON-LINE DESIGN TOOL

• Advantages
• The three new devices eliminate the need for
  traditional dual stage POL conversion and save
  energy and cost by operating directly from 12
  Vin.
• While optimized for 12V input voltage, superior
  efficiencies are also achieved in applications
  with 5V input voltages.
• As a result of programmable switching frequencies
  up to 1.5 MHz and small 4 x 5 mm 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.
• Excellent package thermal properties and low
  height allows back-side board mounting for
  additional space savings.

November 2010