EL711DI
1A Fast Transient DC-DC Buck Converter
With Integrated Silicon Magnetics
Description
The EL711DI is the first of a brand new Linear Direct
Replacement (LDR™) buck regulator family designed
for the economical replacement of Low Drop-Out
(LDO) linear voltage regulators. The EL711DI is a
1000mA Power System-on-Chip, (PowerSoC) switch-
mode DC-DC regulator with integrates MOSFETs,
controller, compensation circuit and a proprietary on-
chip silicon inductor. Utilizing a 3x4.5x0.9mm DFN
package, the EL711DI offers high efficiency at an
excellent solution size and is a cost-effective
alternative to LDOs. With an 18MHz switching
frequency, the EL711DI is the fastest in-class buck
regulator with the lowest output ripple. Due to its all-
silicon PowerSoC construction, the EL711DI also
offers superior reliability over standard discrete
DCDC solutions.
The EL711DI showcases Enpirion’s proprietary
monolithic magnetics-on-silicon inductor technology
and is designed to meet the demand of high
performance digital ASICs, DSPs, and FPGAs found
in servers, routers, switches, and base stations.
Enpirion’s PowerSoC solution improves system
design and productivity by offering simple board
layout, small solution size, low cost, high efficiency,
ultra-fast transient response and high performance.
Features
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Output Current up to 1000mA
High Efficiency
3 x 4.5 x 0.9 mm DFN package
Ultra-Fast Transient Response
2% Initial Output Voltage Accuracy
Input Voltage Range: 2.7V to 5.5V
Output Voltage Range 0.6V to V
IN
– V
DO
18MHz Switching Frequency for Ultra Low Ripple
(8mVpp)
100% IC-level Reliability in a PowerSoC Solution
Short-Circuit, UVLO and Thermal Protection
RoHS compliant, MSL level 3, 260 ° reflow
C
Applications
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Voltage Rails Using LDO with Thermal Issues
Cost-Effective Compliance Energy Star Initiative
High Density Applications with Limited LDO
Footprint
Very Low Noise and Noise Sensitive Applications
CPU, GPU, DSP, FPGA or Memory Core Voltage
Efficiency vs. Output Current
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0
0.1
0.2 0.3 0.4 0.5 0.6 0.7
OUTPUT CURRENT (A)
0.8 0.9
1
VOUT = 2.5V
VOUT = 1.8V
VOUT = 1.5V
VOUT = 1.2V
VOUT = 1.0V
CONDITIONS
V
IN
= 3.6V
Figure 1.
Simplified Ap
plications Circuit
Figure 2.
Highest Efficiency in Smallest Solution Size
www.enpirion.com
07889
November 28, 2012
Rev:
A
ENPIRION [ ENPIRION, INC. ]
