EN5337QI
3A Voltage Mode Synchronous Buck PWM
DC-DC Converter with Integrated Inductor
Description
The EN5337QI is a Power Supply on a Chip
(PwrSoC) DC-DC converter. It integrates
MOSFET switches, all small-signal circuits,
compensation, and the inductor in an advanced
4mm x 7mm QFN package.
The EN5337QI 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
distributed power architectures. 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.
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.
Features
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Integrated Inductor, MOSFETS, Controller
Total Power Solution
≈
75mm
2
Minimal external components.
3A Continuous Output Current Capability
5MHz operating frequency. Switching
frequency can be phase locked to an external
clock.
High efficiency, up to 92%.
Wide input voltage range of 2.375V to 5.5V.
Output Enable pin and Power OK signal.
Programmable soft-start time.
Under Voltage Lockout, Over Current, Short
Circuit and Thermal Protection.
RoHS compliant, MSL level 3, 260C reflow.
Point of load regulation for low-power
processors, network processors, DSPs,
FPGAs, and ASICs
Noise sensitive applications such as A/V, RF
and Gbit I/O
Low voltage, distributed power architectures
with 2.5V, 3.3V or 5V rails
Computing, Networking, DSL, STB, DVR,
DTV, iPC
Ripple sensitive applications
Beat frequency sensitive applications
V
IN
V
OUT
Applications
RA 0402
CA 0402
RB 0402
0402
Soft Start Cap
EN5337QI
EN5337QI
22μF
1206
PVIN
ENA
AVIN
PGND
VOUT
RA
XFB
PGND
RB
CA
47μF
1206
Output Cap
47uF/1206
Input Cap
22uF/1206
SS
AGND
Figure 1: Total Solution Footprint (Not to scale)
Total Area
≈
75 mm
2
Figure 2: Typical Application Schematic
www.enpirion.com
02638
6/18/2009
Rev:D
ENPIRION [ ENPIRION, INC. ]
