EP5348UI Datasheet, PDF (1/12 Pages) Enpirion, Inc. – 400mA Synchronous Buck Regulator with Integrated Inductor

Enpirion^® Power Datasheet
EP5348UI 400mA PowerSoC
Synchronous Buck Regulator
With Integrated Inductor
Description
The EP5348UI delivers the optimal trade-off
between footprint and efficiency. It is a perfect
alternative to replace less efficient LDOs in space
constrained applications that require improved
efficiency.
The EP5348UI is a 400mA PowerSoC which
integrates MOSFET switches, control,
compensation, and the magnetics in a micro-
QFN Package. This highly integrated DCDC
solution offers up to 46-points better efficiency
than the comparable LDO. A significant
reduction in power loss and improved thermals
are achieved. It enables extended battery life
and helps Meet Energy Star requirements.
Features
• Integrated Inductor Technology
• 400mA continuous output current
• 2.0mm x 1.75mm x 0.9mm uQFN package
• Small Solution Footprint
• Efficiency, up to 90%
• V_OUT Range 0.6V to V_IN – V_{DROP_OUT}
• Short circuit and over current protection
• UVLO and thermal protection
• IC level reliability in a PowerSoC solution
95
85
75
65
55
45
35
25
15
0.0
VIN = 5.0V
VOUT = 1.2V
EP5348UI
LDO
Δ = 46-points
0.1
0.2
0.3
Load Current (A)
Applications
• Applications where poor LDO efficiency
creates:
o Thermal challenges
o Battery Life challenges
o Failure to meet Energy Star
requirements
• Space-constrained applications
• Portable media players and USB peripherals
Integrated magnetics enables a tiny solution
footprint, low output ripple, and high reliability,
while maintaining high efficiency. The complete
solution size is similar to an LDO and much
smaller than a comparable DCDC.
V_IN
C_IN
2.2µF
0603
0.1µF
C_AVIN
PVIN
VOUT
AVIN
EP5348
C_A
R_A
ENABLE
VFB
AGND PGND
R_B
V_OUT
C_OUT
10µF
0603
Figure 1: Typical Application Schematic
05721
October 11, 2013
www.altera.com/enpirion
Rev D