EN5335QI Datasheet, PDF (1/13 Pages) Enpirion, Inc. – 3A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor 3-Pin Programmable Output

EN5335QI
3A Voltage Mode Synchronous Buck PWM
DC-DC Converter with Integrated Inductor
3-Pin Programmable Output
Description
The EN5335QI is a Power System on a Chip
(PowerSoC). It is specifically designed to meet
the precise voltage and fast transient
requirements of present and future high-
performance, low-power processor, DSP, FPGA,
memory boards and system level applications in
a distributed power architecture. Advanced circuit
techniques, ultra high switching frequency, and
very advanced, high-density, integrated circuit
and proprietary inductor technology deliver high-
quality, ultra compact, non-isolated DC-DC
conversion. Operating this converter requires as
few as three external components that include
small value input and output ceramic capacitors
and a soft-start capacitor.
The Enpirion solution significantly helps in
system design and productivity by offering greatly
simplified board design, layout and
manufacturing requirements. In addition, a
reduction in the number of vendors required for
the complete power solution helps to enable an
overall system cost savings.
All Enpirion products are RoHS compliant and
lead-free manufacturing environment compatible.
Typical Application Circuit
V_IN
22μF
PVIN
VS0
AVIN
VS1
VS2
VID Output
Voltage Select
Features
• Integrated INDUCTOR, MOSFETS, Controller
• Footprint 1/3^rd that of competing solutions.
• Low Part Count: only 3 MLC Capacitors.
• Up to 10W continuous output power.
• 5MHz operating frequency.
• High efficiency, up to 93%.
• V_OUT accuracy 3% over line, load and temp.
• Wide input voltage range of 2.375V to 5.5V.
• 3-pin VID output voltage select to choose one
of 7 pre-programmed voltage levels.
• Output enable pin and Power OK signal.
• Programmable soft-start time.
• Programmable over-current protection.
• Thermal shutdown, short circuit, and UVLO
• RoHS compliant, MSL level 3, 260C reflow.
Applications
• Point of load regulation for low-power
processors, network processors, DSPs,
FPGAs, and ASICs
• Notebook computers, servers, workstations
• Broadband, networking, LAN/WAN, optical
• Low voltage, distributed power architectures
with 2.5V, 3.3V or 5V rails
• DSL, STB, DVR, DTV, iPC
• Ripple sensitive applications
POK
VSENSE
SS
VOUT
V_OUT Ordering Information
15nF
AGND PGND
47μF
Part Number
EN5335QI
EN5335QI-E
Temp Rating
(°C)
Package
-40 to +85
44-pin QFN T&R
QFN Evaluation Board
Figure 1. Simple Layout.
00846
1
9/18/2009
www.enpirion.com
Rev:C