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EN5312Q Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part No. EN5312Q
Description  Fully Integrated Voltage Mode Synchronous Buck PWM DC-DC Converter Module
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EN5312Q Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers

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Rev. 0.87 – January 2006
EN5312Q
Typical Performance Characteristics
Vin = 3.6V
60
70
80
90
100
100
200
300
400
500
600
700
800
900
1000
Load Current (mA)
3.3V
2.5V
1.8V
1.2V
Figure 5. Efficiency -vs- Load, Vin = 3.6V.
Detailed Description
Functional Overview
The EN5312Q is a complete DCDC converter
solution requiring only two low cost MLCC
capacitors.
MOSFET switches, PWM controller,
Gate-drive,
compensation,
and
inductor
are
integrated into the tiny 4mm x 5mm x 1.1mm
package to provide the smallest footprint possible
while maintaining high efficiency, low quiescent
current, and high performance. The converter uses
voltage mode control to provide the simplest
implementation while also providing excellent
transient response. The device operates at a 5 MHz
switching frequency to make possible the very
small
components
required
to
enable
this
unprecedented level of integration.
Enpirion’s proprietary power MOSFET technology
provides very low switching loss at frequencies of 5
MHz and higher, allowing for the use of very small
internal components, and very wide control loop
bandwidth. Unique magnetics allow for high value
inductor integrated into a low profile 1.1mm
package. Integration of the inductor substantially
reduces switching noise and design/layout issues
normally associated with switch-mode DCDC
converters.
All of this enables much easier and
faster integration into various applications to meet
demanding EMI requirements.
Output voltage is chosen from seven preset values
via a three pin VID voltage select scheme.
An
external divider option enables the selection of any
voltage in the 3.3V to 0.6V range. This reduces the
number of components that must be qualified and
reduces inventory problems. The VID pins can be
toggled on the fly to implement glitch free dynamic
voltage scaling.
Protection features include under-voltage lock-out
(UVLO), over-current protection (OCP), short
circuit protection, and thermal overload protection.
Integrated
Inductor
for
Low
Noise
Design
Enpirion has introduced the world’s first product
family
featuring
integrated
inductors.
The
EN5312Q family utilizes a low loss, planar
construction inductor.
The use of an internal
inductor reduces noise associated with pulsed
switching currents that would otherwise be present
on the user circuit board. Integration minimizes the
path impedance between the MOSFET switches and
the inductor electrode, thereby reducing one of the
Rev. 0.87 – January 2006
www.enpirion.com
5


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