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PDF EN5310 Data sheet ( Hoja de datos )
| Número de pieza | EN5310 | |
| Descripción | 1A Voltage Mode Synchronous Buck PWM DC-DC Converter | |
| Fabricantes | Enpirion | |
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ENPIRION
EN5310
1A Voltage Mode Synchronous Buck PWM
DC-DC Converter
Description
The EN5310 is a Power System on a Chip DC-DC
converter. It is specifically designed to meet the
precise voltage and fast transient requirements of
present and future high-performance, 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 high-quality, 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.
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.
Features
• 1000mA output current capacity
• External inductor is NOT required
• Lead-Free packaging
• 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 resistor divider and OVP 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
Typical Application Circuit
VIN
10µF
PVIN
AVIN
VS0
VS1
VS2
POK
VSENSE
SS VOUT
15nF
AGND PGND
VID Output
Voltage Select
VOUT
22µF
Applications
• 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
Ordering Information
Part Number
EN5310DC
EN5310DC-T
EN5310DI
EN5310DI-T
EN5310DC-E
Temp Rating (°C)
Package
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
Rev 0.95 – March 2005
1
www.enpirion.com
1 page  
Rev 0.95 – March 2005
EN5310
PinwwDw.eDastacShreeitp4Ut.cioomns
PIN NAME
FUNCTION
1 NC NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
2
XFB
External feedback voltage input. Option for programming the output voltage with a
resistor divider on VOUT.
3
VSENSE
Remote voltage sense input. Connect this pin to the load voltage at the point to be
regulated.
4 NC NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
5 NC NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
6 ENABLE Enable input. An input high enables operation. An input low disables operation.
7 NC NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
Over-Voltage set-point input. When using an external voltage divider and the XFB pin. When
8
XOV
VS0, VS1 and VS2 are left OPEN or pulled high, an additional voltage divider separate from
the XFB pin is required to set the OVP set-point. In this mode, the OVP function is disabled if
this voltage divider is not present.
9
10
11
PGND Power ground for the power stage circuits.
12
13
14
15
16
VOUT Voltage and power output.
17
18
19 NC NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
20
21
22
PGND Power ground for the power stage circuits.
23
24 NC NO CONNECT – Do not electrically connect this pin to PCB. See Note 5.
25
26
27
PVIN
Power voltage input for the power stage circuits.
28
29 VS2 Voltage select line 2 input. See Table 1.
30 ROCP Over-Current trip point adjust input. Used for adjusting the OCP trip point.
31 VS1 Voltage select line 1 input. See Table 1.
32 AVIN Analog voltage input for the controller circuits.
33 AGND Analog ground for the controller circuits.
34 VS0 Voltage select line 0 input. See Table 1.
35
POK
Power OK is an open drain transistor for power system state indication.
36 SS Soft-Start node. A capacitor is connected between this pin and AGND.
NOTES:
5. This pin is used for engineering test purposes and reserved for future use. Solder, but do not electrically connect this pin to
the PCB.
5 www.enpirion.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet EN5310.PDF ] | |
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