Rev 1.0 July 2005 www.enpirion.com
1
EN5360
6A Voltage Mode Synchronous Buck PWM
DC-DC Converter
Description
This Enpirion EN5360 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
four external components that include small value
input and output ceramic capacitors and a soft-start
capacitor.
The Enpirion EN5360 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.
Typical Application Circuit
VID Output
Voltage Select
V
OUT
V
IN
VSENSE
47
F
22
F
15nF
VOUT
VS0
VS1
VS2
POK
PGND
AGND
SS
PVIN
AVIN
22
F
Features
Up to 20W output power (at V
OUT
=3.3V)
External inductor is NOT required
Lead-Free packaging
5MHz operating frequency
More than 90% efficient
V
OUT
accuracy of 2% over line, load and
temperature
1/3 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
output voltages from 0.8V to V
IN
-600mV
Output enable pin and Power OK signal
Programmable soft-start time
Over-current protection
Thermal shutdown, short circuit, output over-
voltage and input under-voltage protection
Applications
Servers, workstations and PCs
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
Temp Rating (C)
Package
EN5360DC
0 to 70
48-pin DFN
EN5360DC-T
0 to 70
48-pin DFN T&R
EN5360DI
-40 to +85
48-pin DFN
EN5360DI-T
-40 to +85
48-pin DFN T&R
EN5360DC-E
DFN Evaluation Board
Rev 1.0 July 2005
www.enpirion.com
2
EN5360
Pin Configuration
This diagram is a top-view of the component and represents the on-board layout requirements for the
landing pads and thermal connection points. Specific dimensions for the pads are presented on page 10.
Pin 1 of the device is signified by the white dot marked on the top of the device.
Block Diagram
Rev 1.0 July 2005
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3
EN5360
Typical Efficiency
V
IN
= 3.3V and V
OUT
= 2.5V
70.0%
75.0%
80.0%
85.0%
90.0%
95.0%
0.3
1.0
2.0
3.0
4.0
5.0
6.0
Output Current (A)
Efficicency
Waveforms
5Vin / 1.2Vout
6A load
CH1 = VOUT
CH2 = ENABLE
CH3 = POK
Soft Start capacitor = 15nF
Rev 1.0 July 2005
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EN5360
5Vin / 1.2Vout
0-6A Load step
Absolute Maximum Ratings
CAUTION: Stresses in excess of the absolute maximum ratings may cause permanent damage to the device.
Exposure to absolute maximum ratings for extended periods can adversely affect device reliability.
PARAMETER
SYMBOL MIN
MAX UNITS
Input Supply Voltage
V
IN
-0.5
6.5 V
Input Voltage Enable
-0.5
V
IN
V
Input Voltage VS0, VS1 & VS2 (Note 1)
-0.5
2.8
V
Storage Temperature Range
T
STG
-65
150 C
Operating Junction Temperature
T
J
150
C
MSL per JEDEC J-STD-020A Level 3 (Note 2)
240
C
ESD Rating (based on Human Body Model)
2000
V
NOTES:
1. VS0, VS1 and VS2 pins have an internal pull-up resistor, only ground potentials should be placed on them as required.
2. Evaluation for MSL3 at 255C in process.
Recommended Operating Conditions
PARAMETER
SYMBOL MIN
MAX UNITS
Input Supply Voltage
V
IN
2.375
5.5 V
Operating Junction Temperature
T
J
-40
125
C
Thermal Characteristics
PARAMETER
SYMBOL
TYPICAL UNITS
Thermal Resistance: Junction to Ambient (0 LFM)
(Note 3)
JA
22
C/W
Thermal Resistance: Junction to Case (0 LFM)
JC
3
C/W
NOTES:
3. Based on a four-layer board and proper thermal design in line with JEDEC EIJ/JESD 51 Standards.
Rev 1.0 July 2005
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EN5360
Electrical Characteristics
NOTE: V
IN
=3.3V and over operating temperature range unless otherwise noted. Typical values are at T
A
=
25C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNITS
Operating Input
Voltage
V
IN
2.375 5.5 V
Quiescent Supply
Current
I
Q
No switching, AVIN = 3.3V,
PVIN = 3.3V, ENABLE=0V
20 mA
No-Load Operating
Current
I
NL
Includes PWM, gate drive and
inductor ripple current.
100 mA
Switching
Frequency
F
OSC
5
MHz
Thermal Overload
Trip Point
T
J
160 C
V
OUT
Range V
OUT
Using external voltage divider
0.8
V
Accuracy V
OUT
Over line, load and temperature
2.0
%
Line Regulation
V
OUT
V
IN
= 2.5 to 5.0 volts
3
mV
Load Regulation
V
OUT
I
LOAD
= 0 to 6A
3
mV
V
OUT
T
A
= 0 to 70C
+0.25
-0.45
%
Temperature
Regulation
V
OUT
T
A
= -40 to 85C
+0.65
-0.55
%
Transient Response (I
OUT
= 0% to 100% or 100% to 0% of Rated Load)
Peak Deviation
V
OUT
V
IN
= 5V, 1.2V < V
OUT
< 3.3V
2
5
%
Output Voltage Ripple (with 5 x 10F X5R or X7R ceramic capacitors)
Peak-to-peak V
OUT-PP
V
IN
= 5.0V, V
OUT
= 1.2V, I
OUT
= 6A,
C
OUT
= 50uF, 5 x 10F X5R or X7R
ceramic capacitors
15 mV
Output Current (Note 4)
Max Continuous
Output Current
I
OUT
6
A
Over-Current
Threshold
I
OCP
9 A
Short-Circuit
Current
I
SC
8.5 A
Enable Operation
Disable Threshold
V
DISABLE
Max voltage to ensure the converter
is disabled
0.8
V
Enable Threshold
V
ENABLE
Min voltage to ensure the converter
is enabled
1.8 V
Power OK Operation
POK low voltage
V
POK
I
POK
= 1mA
0.4
V
Max POK Voltage
V
POK
Supply voltage applied to POK
5.5
V
NOTES:
4. Maximum output current may need to be de-rated, based on operating condition, to meet T
J
requirements.
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