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PDF EN5312Q Data sheet ( Hoja de datos )
| Número de pieza | EN5312Q | |
| Descripción | Fully Integrated Voltage Mode Synchronous Buck PWM DC-DC Converter Module | |
| Fabricantes | ENPIRION | |
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Hay una vista previa y un enlace de descarga de EN5312Q (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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ENPIRION
Preliminary
EN5312Q
Fully Integrated Voltage Mode Synchronous
Buck PWM DC-DC Converter Module
Rev 0.87 January , 2006
RoHS Compliant
ENABLE
UVLO
Thermal Limit
Current Limit
Soft Start
(-)
PWM
Comp
(+)
Sawtooth
Generator
P-Drive
N-Drive
VIN
VOUT
VSENSE
(-)
Error
Amp
(+)
VREF
DAC
Switch
VFB
Voltage
Select
Package Boundry
VS0 VS1 VS2
Product Highlights
• Revolutionary integrated inductor
• Total footprint as small as 28mm2
• Only two low cost MLCC caps required.
• Very low solution profile at 1.1mm.
• 4mm x 5mm x1.1mm QFN package
• Wide 2.4V to 5.5V input range.
• 1000mA output current.
• Less than 1 µA standby current.
• High efficiency, up to 95%.
• Very low ripple voltage; < 10mV
• 3 Pin VID Voltage select scheme.
• External divider option.
• 5 MHz switching frequency
• 2% accuracy over line, load, & temp.
• Short circuit, UVLO, and thermal protection.
• Stable with up to 100uF output
capacitance.
Product Overview
The Ultra-Low-Profile EN5312Q is targeted to
applications where board area and profile are
critical. EN5312Q is a complete power
conversion solution requiring only two low cost
ceramic MLCC caps. Inductor, MOSFETS,
PWM, and compensation are integrated into a
tiny 4mm x 5mm x 1.1mm QFN package.
Engineered to minimize all sources of converter
noise, the EN5312Q eases design and layout
constraints. 5 MHz switching frequency and
internal type III compensation provides superior
transient response. With a 1.1 mm profile, the
entire layout can occupy as little as 28mm2 of
board area.
A 3-pin VID output voltage select scheme
provides seven pre-programmed output voltages
along with an option for external resistor divider.
Output voltage can be programmed on-the-fly to
provide fast, dynamic voltage scaling.
Typical Application Circuit
VIN
4.7µF
Voltage
Select
ENABLE
Vin
VSense
Vout
PFM
VS0 VFB
VS1
VS2 GND
VOUT
10µF
Figure 1. Typical application circuit.
Applications
• Area constrained applications
• Set top box/home gateway
• Smart phones and PDAs.
• VoIP and Video phones
• Personal Media Players.
• Advanced Mobile Processors, DSP, IO,
Memory, Video, Multimedia Engines.
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Rev. 0.87 – January 2006
EN5312Q
Typical Performance Characteristics
Vin = 3.6V
100
90
80
3.3V
70 2.5V
1.8V
1.2V
60
100 200 300 400 500 600 700 800 900 1000
Load Current (mA)
Figure 5. Efficiency -vs- Load, Vin = 3.6V.
Detailed Description
Functional Overview
faster integration into various applications to meet
demanding EMI requirements.
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
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
5
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Rev. 0.87 – January 2006
EN5312Q
Figure 11. PWB Solder Mask Openings.
N5312
XXXXX
YYWW
Rev. 0.87 – January 2006
11
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EN5312Q.PDF ] | |
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