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 Silicon DC-
DC converter. 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
AVIN
VS0
VS1
VS2
Features
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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
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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
VID Output
Voltage Select
POK
SS
VSENSE
VOUT
V
OUT
47µF
Ordering Information
Part Number
EN5335QI-T
EN5335QI-E
Temp Rating
(°
C)
Package
-40 to +85
44-pin QFN T&R
QFN Evaluation Board
15nF
AGND
PGND
Figure 1. Simple Layout.
1
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