Enpirion Power Datasheet
EP53A8LQI/HQI 1A PowerSoC
Voltage Mode Synchronous
PWM Buck with Integrated Inductor
Description Features
The EP53A8LQI and EP53A8HQI are 1A PowerSoCs Integrated Inductor Technology
with integrated MOSFET switches, control,
3mm x 3mm x 1.1mm QFN Package
compensation, and inductor in an advanced 3mm x
2
Total Solution Footprint ~ 21mm
3mm QFN Package.
Low V Ripple for IO Compatibility
OUT
Integrated inductor ensures the complete power
solution is fully characterized with the inductor
High Efficiency, up to 94%
carefully matched to the silicon and compensation
V Range 0.6V to V 0.5V
OUT IN
network. It enables a tiny solution footprint, low output
1A Continuous Output Current
ripple, low part-count, and high reliability, while
maintaining high efficiency. The complete solution
5 MHz Switching Frequency
2
can be implemented in as little as 21mm and operate
3-pin VID for Glitch Free Voltage Scaling
from -40C to 85C ambient temperature range.
Short Circuit and Over Current Protection
The EP53A8xQI uses a 3-pin VID to easily select the
UVLO and Thermal Protection
output voltage setting. Output voltage settings are
available in 2 optimized ranges providing coverage
IC Level Reliability in a PowerSoC Solution
for typical V settings.
OUT
Applications
The VID pins can be changed on the fly for fast
dynamic voltage scaling. EP53A8LQI further has the
Portable Wireless and RF applications
option to use an external voltage divider.
Wireless Broad Band Data Cards
Solid State Storage Applications
Noise and Space Sensitive Applications
Efficiency vs. I (V = 3.3V)
OUT IN
100
EP53A8xQI
V
OUT
V 95
IN
PVIN VOUT 90
100
85
AVIN
80
ENABLE VSENSE
4.7F
2
75
21mm
10F
0805 VS0
70
0805
VFB
X7R VS1
65
X7R
VS2
60
PGND AGND
55
CONDITIONS
50
VOUT = 2.5V
V = 3.3V
IN
45
40
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
OUTPUT CURRENT (A)
Figure 1. Simplified Applications Circuit Figure 2. Highest Efficiency in Smallest Solution Size
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03651 July 15, 2015 Rev G
EFFICIENCY (%)
EP53A8LQI/EP53A8HQI
Ordering Information
Part Number Package Markings T (C) Package Description
A
EP53A8LQI AJXX -40 to +85 16-pin (3mm x 3mm x 1.1mm) QFN
EP53A8HQI AMXX -40 to +85 16-pin (3mm x 3mm x 1.1mm) QFN
EVB-EP53A8xQI QFN Evaluation Board
Packing and Marking Information: www.altera.com/support/reliability/packing/rel-packing-and-marking.html
Pin Assignments (Top View)
16 15 16 15
1 14 1 14
NC(SW) PVIN NC(SW) PVIN
PGND 2 13 PGND 2 13
AVIN AVIN
3 12 3 12
PGND ENABLE PGND ENABLE
4 11 4 11
VFB VS0 NC VS0
5 5
VSENSE 10 VSENSE 10
VS1 VS1
9 9
AGND 6 VS2 AGND 6 VS2
7 8 7 8
Figure 3. EP53A8LQI Pin Out Diagram (Top View) Figure 4. EP53A8HQI Pin Out Diagram (Top View)
NOTE A: NC pins are not to be electrically connected to each other or to any external signal, ground, or voltage.
However, they must be soldered to the PCB. Failure to follow this guideline may result in part malfunction or damage.
NOTE B: White dot on top left is pin 1 indicator on top of the device package.
Pin Description
PIN NAME FUNCTION
PIN NAME FUNCTION
NO CONNECT These pins are internally connected to the common switching node of the
internal MOSFETs. NC (SW) pins are not to be electrically connected to any external signal,
1, 15, 16 NC(SW)
ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline
may result in part malfunction or damage to the device.
Power ground. Connect this pin to the ground electrode of the Input and output filter
2,3 PGND
capacitors.
EP53A8LQI: Feedback pin for external divider option.
4 VFB / NC
EP53A8HQI: No Connect
5 VSENSE Sense pin for preset output voltages. Refer to application section for proper configuration.
Analog ground. This is the quiet ground for the internal control circuitry, and the ground return
6 AGND
for external feedback voltage divider
7, 8 VOUT Regulated Output Voltage. Refer to application section for proper layout and decoupling.
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03651 July 15, 2015 Rev G
VOUT NC(SW)
NC(SW)
VOUT
VOUT NC(SW)
NC(SW)
VOUT