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.
Features
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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
Typical Application Circuit
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•
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V
IN
22µF
22µF
POK
SS
PVIN
AVIN
VS0
VS1
VS2
VID Output
Voltage Select
•
VSENSE
VOUT
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
V
OUT
47µF
15nF
AGND
PGND
Ordering Information
Part Number
EN5360DC
EN5360DC-T
EN5360DI
EN5360DI-T
EN5360DC-E
Temp Rating (°C)
Package
0 to 70
48-pin DFN
0 to 70
48-pin DFN T&R
-40 to +85
48-pin DFN
-40 to +85
48-pin DFN T&R
DFN Evaluation Board
Rev 1.0 – July 2005
1
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Rev 1.0 – July 2005
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
Input Supply Voltage
Input Voltage – Enable
Input Voltage – VS0, VS1 & VS2
(Note 1)
Storage Temperature Range
Operating Junction Temperature
MSL per JEDEC J-STD-020A Level 3
(Note 2)
ESD Rating (based on Human Body Model)
NOTES:
1.
2.
SYMBOL
V
IN
T
STG
T
J
MIN
-0.5
-0.5
-0.5
-65
MAX
6.5
V
IN
2.8
150
150
240
2000
UNITS
V
V
V
°C
°C
°C
V
VS0, VS1 and VS2 pins have an internal pull-up resistor, only ground potentials should be placed on them as required.
Evaluation for MSL3 at 255°C in process.
Recommended Operating Conditions
PARAMETER
Input Supply Voltage
Operating Junction Temperature
SYMBOL
V
IN
T
J
MIN
2.375
-40
MAX
5.5
125
UNITS
V
°C
Thermal Characteristics
PARAMETER
Thermal Resistance: Junction to Ambient (0 LFM)
(Note 3)
Thermal Resistance: Junction to Case (0 LFM)
NOTES:
3.
Based on a four-layer board and proper thermal design in line with JEDEC EIJ/JESD 51 Standards.
SYMBOL
θ
JA
θ
JC
TYPICAL
22
3
UNITS
°C/W
°C/W
4
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Rev 1.0 – July 2005
EN5360
Electrical Characteristics
NOTE: V
IN
=3.3V and over operating temperature range unless otherwise noted. Typical values are at T
A
=
25°C.
PARAMETER
Operating Input
Voltage
Quiescent Supply
Current
No-Load Operating
Current
Switching
Frequency
Thermal Overload
Trip Point
V
OUT
Range
Accuracy
Line Regulation
Load Regulation
Temperature
Regulation
SYMBOL
V
IN
I
Q
I
NL
F
OSC
T
J
V
OUT
V
OUT
∆V
OUT
∆V
OUT
∆V
OUT
∆V
OUT
Using external voltage divider
Over line, load and temperature
V
IN
= 2.5 to 5.0 volts
I
LOAD
= 0 to 6A
T
A
= 0 to 70ºC
T
A
= -40 to 85ºC
0.8
2.0
3
3
+0.25
-0.45
+0.65
-0.55
2
15
5
No switching, AVIN = 3.3V,
PVIN = 3.3V, ENABLE=0V
Includes PWM, gate drive and
inductor ripple current.
TEST CONDITIONS
MIN
2.375
20
100
5
160
TYP
MAX
5.5
UNITS
V
mA
mA
MHz
°C
V
%
mV
mV
%
%
%
mV
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
Output Voltage Ripple (with 5 x 10µF X5R or X7R ceramic capacitors)
V
IN
= 5.0V, V
OUT
= 1.2V, I
OUT
= 6A,
Peak-to-peak
V
OUT-PP
C
OUT
= 50uF, 5 x 10µF X5R or X7R
ceramic capacitors
Output Current (Note 4)
Max Continuous
I
OUT
Output Current
Over-Current
I
OCP
Threshold
Short-Circuit
I
SC
Current
Enable Operation
Max voltage to ensure the converter
Disable Threshold
V
DISABLE
is disabled
Min voltage to ensure the converter
1.8
Enable Threshold
V
ENABLE
is enabled
Power OK Operation
POK low voltage
V
POK
I
POK
= 1mA
Max POK Voltage
V
POK
Supply voltage applied to POK
NOTES:
4.
6
9
8.5
0.8
A
A
A
V
V
0.4
5.5
V
V
Maximum output current may need to be de-rated, based on operating condition, to meet T
J
requirements.
5
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Analog electronics
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