Download SupIRBuck™ Point-of-Load Voltage Regulators in a Compact 4x5

SupIRBuck™ Point-of-Load
Voltage Regulators in a
Compact 4x5 mm Package
Features
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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
-40C to 125C operating junction temp (Tj)
Halogen free, lead free and RoHS compliant
PRESS
RELEASE
DATA SHEETS
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.
HI-RES
GRAPHIC
SuPIRBuck™
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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 cutand-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