EP53F8QI
1500 mA Synchronous Buck PWM
DC-DC Converter with Integrated Inductor
RoHS Compliant; Halogen Free
Description
The EP53F8QI provides high efficiency in a very
small footprint. Featuring integrated inductor, the
device delivers up to 1500mA of continuous
output current. Total solution footprint can be as
little as 40mm
2
.
Output voltage is programmed via an external
resistor divider providing a wide range of
flexibility while maintaining a very small footprint.
Integration of the inductor reduces conducted
and
radiated
noise
providing
excellent
compatibility with sensitive RF and high speed
data applications.
Application
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•
Wireless wide area networking data cards.
Replacement of inefficient LDOs
Noise Sensitive Applications such as RF,
Audio and Video, and high speed IO
Computing, Computer Peripherals, Storage,
Networking, and Instrumentation
USB, DSL, STB, DVR, DTV, and iPC
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Integrated Inductor Technology
Total Solution Footprint as Small as 40 mm
2
3 mm x 3 mm x 1.1 mm QFN Package
Solution Power Density up to 140mW/mm
2
1500 mA Continuous Output Current
High Efficiency, up to 94 %
Low Ripple Voltage; 8 mV
P-P
Typical
Power OK Signal with 5 mA Sink Capability
Efficiency (%)
95
85
75
65
55
45
35
25
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5
Load Current (A)
Figure 1: Typical Application Circuit
Product Performance
2.4V to 5.5V Input Voltage Range
Fast Transient Response
4 MHz Fixed Switching Frequency
Low Dropout Operation: 100 % Duty Cycle
Under Voltage Lockout, Over Current, Short
Circuit, and Thermal Protection
RoHS Compliant; MSL 3 260 °C Reflow
Figure 2: Efficiency, V
IN
=5V, V
OUT
=3.7V
www.enpirion.com
01542
4/3/2009
Rev:A
ENPIRION [ ENPIRION, INC. ]
