EP5358LUI/EP5358HUI
500mA Synchronous Buck Regulator
with Integrated Inductor
RoHS Compliant; Halogen Free
Description
The EP5358xUI (x = L or H) is a 500mA
PowerSOC. The EP5358xUI integrates MOSFET
switches, control, compensation, and the
magnetics in an advanced 2.5mm x 2.25mm
micro-QFN Package.
Integrated magnetics enables a tiny solution
footprint, low output ripple, low part-count, and
high reliability, while maintaining high efficiency.
The complete solution can be implemented in as
little as 15mm
2
.
The EP5358xUI uses a 3-pin VID to easily select
the output voltage setting.
Output voltage
settings are available in 2 optimized ranges
providing coverage for typical V
OUT
settings.
The VID pins can be changed on the fly for fast
dynamic voltage scaling. EP5358LUI further has
the option to use an external voltage divider.
The EP5358xUI is a perfect solution for noise
sensitive and space constrained applications that
require high efficiency.
Features
•
•
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•
•
•
•
•
•
•
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Integrated Inductor Technology
2.5mm x 2.25mm x 1.1mm uQFN package
Total Solution Footprint < 15mm
2
Low V
OUT
ripple for RF compatibility
High efficiency, up to 93%
500mA continuous output current
Less than 1µA standby current
5 MHz switching frequency
3 pin VID for glitch free voltage scaling
V
OUT
Range 0.6V to V
IN
– 0.25V
Short circuit and over current protection
UVLO and thermal protection
IC level reliability in a PowerSOC solution
Application
•
•
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•
Wireless and RF applications
Wireless broad band data cards
Smart phone and portable media players
Advanced Low Power Processors, DSP, IO,
Memory, Video, Multimedia Engines
V
IN
AV
IN
PV
IN
ENABLE
2.2uF
V
SENSE
V
OUT
V
OUT
5.4
mm
Input Cap
2.2uF 0603
EP5358HUI
V
S0
V
S1
V
S2
10uF
2.7
mm
EN5358xUI
Output Cap
10uF 0603
PGND
AGND
Figure 1: Total Solution Footprint (Not to Scale)
Figure 2: Typical Application Schematic
www.enpirion.com
03541
5/29/2009
Rev:A
ENPIRION [ ENPIRION, INC. ]
