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PDF EN5339QI Data sheet ( Hoja de datos )
| Número de pieza | EN5339QI | |
| Descripción | 3A Low Profile Synchronous Buck DC-DC Converter | |
| Fabricantes | Enpirion | |
| Logotipo |  |
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EN5339QI
3A Low Profile Synchronous Buck DC-DC
Converter with Integrated Inductor
RoHS Compliant
Halogen Free
Description
The EN5339 is a low profile 3A, high efficiency,
synchronous buck PowerSoC. The device
features integrated inductor, PWM controller,
MOSFETS, and compensation providing the
smallest possible solution size.
The EN5339QI is pin compatible with Enpirion’s
EN5322QI 2A PowerSoC enabling a family of
scalable solutions.
The high frequency operation allows for the use
of tiny MLCC capacitors. It also enables a very
wide control loop bandwidth providing excellent
transient performance and reduced output
impedance. The internal compensation is
designed for unconditional stability across all
operating conditions.
The output voltage is set via a simple and flexible
resistor divider network.
The very high efficiency and low profile design
make this device optimal for space constrained
applications requiring up to 3A of continuous
output current.
Features
• Integrated Inductor
• Solution Footprint as Small as 55 mm2
• Low profile, 1.1mm
• High Reliability Solution: 28,200 Years in MTTF
• High Efficiency, up to 95 %
• Low Output Ripple Voltage; <5mVP-P Typical
• ±3% Output Variation Over Line, Load, Temp
• 2.4 V to 5.5 V Input Voltage Range
• 3A Continuous Output Current Capability
• Output Enable and Power OK Signal
• Under Voltage Lockout, Over Current, Short
Circuit, and Thermal Protection
• RoHS Compliant; Halogen Free; 260°C Reflow
Applications
• Applications with Low Profile Requirement
such as SSD and Embedded Computing
• SAN/NAS accelerator appliance
• Controllers, Raid, Processors, Network
Processors, DSPs’ FPGAs, and ASICs
• Noise sensitive applications
Figure 1. Simplified Applications Circuit
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency vs. Output Current
CONDITIONS
VIN = 3.3V
VOUT = 2.5V
VOUT = 1.2V
Actual Solution Size
55mm2
0.5 1 1.5 2 2.5
OUTPUT CURRENT (A)
3
Figure 2. Highest Efficiency in Smallest Solution Size
www.enpirion.com
Free Datasheet http://www.0PDF.com
1 page  
EN5339QI
Electrical Characteristics
NOTE: VIN = 5V, Minimum and Maximum values are over operating ambient temperature range unless otherwise noted.
Typical values are at TA = 25°C.
PARAMETER
Operating Input Voltage
Feedback Node Initial
Accuracy
Output Variation (Note 3)
(Line, Load, Temperature)
VFB, ENABLE, TST0/1/2
Pin Input Current (Note 4)
Shutdown Current
Under Voltage Lock-out –
VIN Rising
Under Voltage Lock-out –
tVIN Falling
Soft Start Time
SYMBOL
VIN
VVFB
VOUT
VUVLOR
VUVLOF
TEST CONDITIONS
TA = 25°C; V IN = 5V
ILOAD = 100 mA
2.4V ≤ VIN ≤ 5.5V
0 ≤ ILOAD ≤ 3A
ENABLE Low
Voltage Above Which UVLO is
Not Asserted
Voltage Below Which UVLO is
Asserted
Time from Enable High
MIN
2.4
0.588
TYP
0.6
MAX
5.5
0.612
UNITS
V
V
-3 +3 %
+/-40
18
2.2
nA
µA
V
2.1
0.91 1.40 1.89
V
ms
Dropout Resistance
150 300
mΩ
ENABLE Voltage
Threshold
POK Threshold
POK Threshold
POK Low Voltage
POK Pin VOH Leakage
Current
Current Limit Threshold
Operating Frequency
Output Ripple Voltage
FOSC
VRIPPLE
Logic Low
Logic High
VOUT Rising
VOUT Falling
ISINK = 5 mA
POK High
2.4V ≤ VIN ≤ 5.5V
COUT = 3 x 22 µF 0805 X5R
MLCC, VOUT = 3.3 V, ILOAD = 3A
COUT = 3 x 22 µF 0805 X5R
MLCC, VOUT = 1.8 V, ILOAD = 3A
0.0 0.4
1.4 VIN
92
90
0.15 0.4
500
3.5 5
3.5
4.2
5.5
V
%
%
V
nA
A
MHz
mVP-P
mVP-P
Note 3: Output voltage variation is based on using 0.1% accuracy resistor values.
Note 4: Parameter not production tested but is guaranteed by design.
Enpirion 2010 all rights reserved, E&OE
Enpirion Confidential
www.enpirion.com, Page 5
Free Datasheet http://www.0PDF.com
5 Page 
Functional Block Diagram
EN5339QI
Figure 4: Functional Block Diagram
Functional Description
Overview
The EN5339QI leverages advanced CMOS
technology to provide high switching frequency,
while also maintaining high efficiency.
Packaged in a 4 mm x 6 mm x 1.1 mm QFN,
the EN5339QI provides a high degree of flexibility
in circuit design while maintaining a very small
footprint. High switching frequency allows for the
use of very small MLCC input and output filter
capacitors.
The converter uses Type III voltage mode control to
provide high noise immunity, low output impedance
and excellent load transient response.
POK monitors the output voltage and signals if it is
within ±10% of nominal. Protection features include
under voltage lockout (UVLO), over current
protection, short circuit protection, and thermal
overload protection.
Stability over Wide Range of Operating
Conditions
The EN5339QI utilizes an internal compensation
network and is designed to provide stable operation
over a wide range of operating conditions. To
improve transient performance or reduce output
voltage ripple with dynamic loads you have the
option to add supplementary capacitance to the
output.
Soft Start
The EN5339QI has an internal soft-start circuit that
controls the ramp of the output voltage. The control
circuitry limits the VOUT ramp rate to levels that are
safe for the Power MOSFETS and the integrated
inductor.
The EN5339QI has a constant startup up time
which is independent of the VOUT setting. This
means that the output slew rate is a function of the
output voltage setting. The startup time is given in
Enpirion 2010 all rights reserved, E&OE
Enpirion Confidential
www.enpirion.com, Page 11
Free Datasheet http://www.0PDF.com
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet EN5339QI.PDF ] | |
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