EP53A8LQI/EP53A8HQI
1000mA Synchronous Buck Regulator
with Integrated Inductor
RoHS Compliant; Halogen Free
Description
The EP53A8LQI and EP53A8HQI are a 1000mA
PowerSOC. The device integrates MOSFET
switches, control, compensation, and the
Inductor in an advanced 3mm x 3mm QFN
Package.
Integrated inductor ensures the complete power
solution is fully characterized with the inductor
carefully
matched
to
the
silicon
and
compensation network. . It 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 21mm
2
.
The EP53A8xQI 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. EP53A8LQI further has
the option to use an external voltage divider.
Features
•
•
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•
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Integrated Inductor Technology
3mm x 3mm x 1.1mm QFN package
Total Solution Footprint ~ 21mm
2
Low V
OUT
ripple for RF compatibility
High efficiency, up to 94%
1000mA 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
– 0.5V
Short circuit and over current protection
UVLO and thermal protection
IC level reliability in a PowerSOC solution
Application
•
•
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•
Portable wireless and RF applications
Wireless broad band data cards
Solid state storage applications
Noise and space sensitive applications
100 ohm
3.5mm
4.7uF
100 Ohm
PVIN
V
IN
6mm
EP53A8xQI
4.7µF
0603
V
OUT
V
SENSE
V
FB
PGND AGND
V
OUT
AVIN
ENABLE
V
S0
V
S1
V
S2
10µF
0805
10uF
Figure 1: Total Solution Footprint.
Figure 2: Typical Application Circuit.
www.enpirion.com
03651
12/16/2009
Rev:B
ENPIRION [ ENPIRION, INC. ]
