EP53A7LQI/EP53A7HQI
1000mA Synchronous Buck Regulator
with Integrated Inductor
RoHS Compliant; Halogen Free
Description
The EP53A7xQI (x = L or H) is a 1000mA
PowerSOC. The EP53A7xQI integrates MOSFET
switches, control, compensation, and the
magnetics in an advanced 3mm x 3mm 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 21mm
2
.
A proprietary light load mode (LLM) provides high
efficiency in light load conditions.
The EP53A7xQI 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. EP53A7LQI further has
the option to use an external voltage divider.
The EP53A7xQI offers the optimal combination
of very small solution footprint and advanced
performance features.
3.5mm
4.7uF
100 Ohm
Features
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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
55µA quiescent 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
Portable wireless and RF applications
Solid state storage applications
Space constrained applications requiring high
efficiency and very small solution size
100 ohm
Application
PVIN
V
IN
EP53A7xQI
4.7μF
V
OUT
V
SENSE
V
FB
V
OUT
AVIN
ENABLE
LLM
V
S0
V
S1
V
S2
10μF
6mm
PGND AGND
10uF
Figure 1: Total Solution Footprint
Figure 2: Typical Application Schematic
www.enpirion.com
01543
11/11/2009
Rev:B
ENPIRION [ ENPIRION, INC. ]
