ep5368 Enpirion, ep5368 Datasheet - Page 7

• Manufacturer Part Number: ep5368
• Description: 600ma Synchronous Buck Regulator With Integrated Inductor
• Manufacturer: Enpirion

April 2008
Functional Overview
The EP5368QI is a complete DCDC converter
solution requiring only two low cost MLCC
capacitors.
controller,
inductor are integrated into the tiny 3mm x
3mm x 1.1mm package to provide the smallest
footprint
efficiency, low ripple, and high performance.
The converter uses voltage mode control to
provide the simplest implementation and high
noise immunity. The device operates at a
4MHz switching frequency. The high switching
frequency allows for a wide control loop
bandwidth
performance. The high switching frequency
further
components
unprecedented level of integration.
Enpirion’s
technology provides very low switching loss at
frequencies of 4 MHz and higher, allowing for
the use of very small internal components, and
high performance. Integration of the magnetics
virtually eliminates the design/layout issues
normally associated with switch-mode DCDC
converters.
and
applications
requirements.
Output voltage is chosen from seven preset
values via a three pin VID voltage select
scheme.
the selection of any voltage in V
range.
components that must be qualified and
reduces inventory burden. 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.
©Enpirion 2008 all rights reserved, E&OE
faster
enables
This
possible
An external divider option enables
Gate-drive,
proprietary
All of this enables much easier
providing
to
incorporation
MOSFET
reduces
making
the
meet
while
use
compensation,
excellent
power
the
demanding
maintaining
switches,
possible
of
into
number
very
IN
MOSFET
transient
to 0.6V
various
PWM
small
high
EMI
and
this
of
7
Integrated Inductor
Enpirion has introduced the world’s first
product family featuring integrated inductors.
The EP5368QI utilizes a proprietary low loss
integrated inductor.
inductor localizes the noises associated with
the output loop currents. The inherent shielding
and compact construction of the integrated
inductor reduces the radiated noise that
couples into the traces of the circuit board.
Further, the package layout is optimized to
reduce the electrical path length for the AC
ripple currents that are a major source of
radiated emissions from DCDC converters.
The integrated inductor significantly reduces
parasitic effects that can harm loop stability,
and makes layout very simple.
Stable Over Wide Range of Operating
Conditions
The EP5368QI utilizes an internal type III
compensation network and is designed to
provide a high degree of stability over a wide
range of operating conditions.
operates over the entire input and output
voltage range with no external modifications
required. The very high switching frequency
allows for a very wide control loop bandwidth.
Soft Start
Internal soft start circuits limit in-rush current
when the device starts up from a power down
condition or when the “ENABLE” pin is
asserted “high”. Digital control circuitry limits
the V
the Power MOSFETS and the integrated
inductor. The soft start ramp rate is nominally
1.5V/mS.
OUT
ramp rate to levels that are safe for
The use of an internal
www.enpirion.com
The device
EP5368QI