EN5310
1A Voltage Mode Synchronous Buck PWM
DC-DC Converter with Integrated Inductor
ENPIRION
RoHS Compliant
Description
Features
The EN5310 is a Power System on a Chip DCDC converter. It is specifically designed to meet
the precise voltage and fast transient
requirements of present and future highperformance, low-power processor, DSP, FPGA,
memory boards and system level applications in
a distributed power architecture. Advanced circuit
techniques, ultra high switching frequency, and
very advanced, high-density, integrated circuit
and proprietary inductor technology deliver highquality, ultra compact, non-isolated DC-DC
conversion. Operating this converter requires
only three external components that include
small value input and output ceramic capacitors
and a soft-start capacitor.
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The EN5310 significantly helps in system design
and productivity by offering greatly simplified
board design, layout and manufacturing
requirements. In addition, a reduction in the
number of vendors required for the complete
power solution helps to enable an overall system
cost savings.
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1000mA output current capacity
External inductor is NOT required
RoHS compliant, MSL3 rated to 260°C
5MHz operating frequency
More than 90% efficient
VOUT accuracy of 2% over line, load and
temperature
1/2 the board area of discrete component
solutions
Very fast transient response
All high speed switching signals contained
inside the part
Wide input voltage range of 2.375V to 5.5V
Digital voltage selector with options for
common output voltages from 0.8V to 3.3V
External divider option for programming
output voltages from 0.9V to 4.0V
Output enable pin and Power OK signal
Programmable soft-start time
Programmable over-current protection
Thermal shutdown, short circuit, over-voltage
and under-voltage protection
Applications
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Typical Application Circuit
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VIN
PVIN
10µF
VS0
AVIN
VS1
VS2
POK
SS
VID Output
Voltage Select
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Ordering Information
VSENSE
VOUT
VOUT
Part Number
EN5310DC
EN5310DC-T
EN5310DI
EN5310DI-T
EN5310DC-E
22µF
15nF
AGND
Rev 1.0 – January 2006
VOIP phones, video telephones
Broadband, networking, LAN/WAN, optical
telecommunications equipment
Point of load regulation for low-power
processors, network processors, DSPs,
FPGAs, and ASICs
Low voltage, distributed power architectures
with 2.5V, 3.3V or 5V rails
PGND
1
Temp Rating
Package
(°C)
0 to 70
36-pin DFN
0 to 70
36-pin DFN T&R
-40 to +85
36-pin DFN
-40 to +85
36-pin DFN T&R
DFN Evaluation Board
www.enpirion.com