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PDF EP5358HUI Data sheet ( Hoja de datos )
| Número de pieza | EP5358HUI | |
| Descripción | 500mA Synchronous Buck Regulator | |
| Fabricantes | Enpirion | |
| Logotipo |  |
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EP5358LUI/EP5358HUI
500mA Synchronous Buck Regulator
with Integrated Inductor
RoHS Compliant; Halogen Free
Description
The EP5358xUI (x = L or H) is a 500mA
PowerSOC. The EP5358xUI integrates MOSFET
switches, control, compensation, and the
magnetics in an advanced 2.5mm x 2.25mm
micro-QFN Package.
Integrated magnetics enables a tiny solution
footprint, low output ripple, low part-count, and
high reliability, while maintaining high efficiency.
The complete solution can be implemented in as
little as 15mm2.
The EP5358xUI uses a 3-pin VID to easily select
the output voltage setting. Output voltage
settings are available in 2 optimized ranges
providing coverage for typical VOUT settings.
The VID pins can be changed on the fly for fast
dynamic voltage scaling. EP5358LUI further has
the option to use an external voltage divider.
The EP5358xUI is a perfect solution for noise
sensitive and space constrained applications that
require high efficiency.
Features
• Integrated Inductor Technology
• 2.5mm x 2.25mm x 1.1mm uQFN package
• Total Solution Footprint < 15mm2
• Low VOUT ripple for RF compatibility
• High efficiency, up to 93%
• 500mA continuous output current
• Less than 1µA standby current
• 5 MHz switching frequency
• 3 pin VID for glitch free voltage scaling
• VOUT Range 0.6V to VIN – 0.25V
• Short circuit and over current protection
• UVLO and thermal protection
• IC level reliability in a PowerSOC solution
Application
• Wireless and RF applications
• Wireless broad band data cards
• Smart phone and portable media players
• Advanced Low Power Processors, DSP, IO,
Memory, Video, Multimedia Engines
5.4
mm
2.7
mm
EN5358xUI
VIN
2.2uF
AVIN
VSENSE
PVIN
VOUT
ENABLE
EP5358HUI
VS0
VS1
VS2 PGND
AGND
VOUT
10uF
Figure 1: Total Solution Footprint (Not to Scale)
Figure 2: Typical Application Schematic
www.Da0t3a5S4h1eet.in
5/29/2009
www.enpirion.com
Rev:A
1 page  
Typical Performance Characteristics
EP5358LUI/EP5358HUI
95
90
85
80
75
70
65
60
55
50
45
0
200 400
Load Current (mA)
600
Efficiency vs. Load Current: VIN = 5.0V, VOUT (from
top to bottom) = 3.3, 2.5, 1.8, 1.2V
95
90
85
80
75
70
65
60
55
50
45
0
200 400
Load Current (mA)
600
Efficiency vs. Load Current: VIN = 3.3V, VOUT (from
top to bottom) = 2.5, 1.8, 1.2V
95
90
85
80
75
70
65
60
55
50
45
0
200 400
Load Current (mA)
600
Efficiency vs. Load Current: VIN = 3.7V, VOUT (from
top to bottom) = 2.5, 1.8, 1.2V
Start Up Waveform: VIN = 5.0V, VOUT = 3.3V;
ILOAD = 10mA
©Enpirion 2009 all rights reserved, E&OE
www.Da0t3a5S4h1eet.in
Start Up Waveform: VIN = 5.0V, VOUT = 3.3V;
ILOAD = 1000mA
5
5/29/2009
www.enpirion.com
Rev:A
5 Page 
EP5358LUI/EP5358HUI
Application Information
VIN
2.2μF
0603
PVIN
AVIN
ENABLE
VOUT
VSENSE
VS0
VS1
VS2 PGND AGND
VOUT
10μF
0603
Figure 6: Application Circuit, EP5358HUI,.
VIN
2.2μF
0603
PVIN
VOUT
AVIN
VSENSE
ENABLE
VFB
VS0
VS1
VS2 PGND AGND
VOUT
10μF
0603
Figure 7: Application Circuit, EP5358LUI, showing
the VFB function.
Output Voltage Programming
The EP5358xUI utilizes a 3-pin VID to program
the output voltage value. The VID is available
in two sets of output VID programming ranges.
The VID pins should be connected either to
AVIN or to AGND to avoid noise coupling into
the device.
The “Low” range is optimized for low voltage
applications. It comes with preset VID settings
ranging from 0.80V and 1.5V. This VID set
also has an external divider option.
To specify this VID range, order part number
EP5358LUI.
The “High” VID set provides output voltage
settings ranging from 1.8V to 3.3V. This
version does not have an external divider
option. To specify this VID range, order part
number EP5358HUI.
Internally, the output of the VID multiplexer
sets the value for the voltage reference DAC,
which in turn is connected to the non-inverting
input of the error amplifier. This allows the use
of a single feedback divider with constant loop
gain and optimum compensation, independent
of the output voltage selected.
NOTE: The VID pins must not be left floating.
EP5358L Low VID Range Programming
The EP5358LUI is designed to provide a high
degree of flexibility in powering applications
that require low VOUT settings and dynamic
voltage scaling (DVS). The device employs a
3-pin VID architecture that allows the user to
choose one of seven (7) preset output voltage
settings, or the user can select an external
voltage divider option. The VID pin settings
can be changed on the fly to implement glitch-
free voltage scaling.
Table 1: EP5358LUI VID Voltage Select Settings
VS2 VS1 VS0 VOUT
0 0 0 1.50
0 0 1 1.45
0 1 0 1.20
0 1 1 1.15
1 0 0 1.10
1 0 1 1.05
1 1 0 0.8
1 1 1 EXT
Table 1 shows the VS2-VS0 pin logic states for
the EP5358LUI and the associated output
voltage levels. A logic “1” indicates a
connection to AVIN or to a “high” logic voltage
level. A logic “0” indicates a connection to
AGND or to a “low” logic voltage level. These
pins can be either hardwired to AVIN or AGND
or alternatively can be driven by standard logic
levels. Logic levels are defined in the electrical
characteristics table. Any level between the
logic high and logic low is indeterminate.
EP5358LUI External Voltage Divider
The external divider option is chosen by
connecting VID pins VS2-VS0 to VIN or a logic
“1” or “high”. The EP5358LUI uses a separate
feedback pin, VFB, when using the external
divider. VSENSE must be connected to VOUT as
indicated in Figure 8. The output voltage is
selected by the following formula:
©Enpirion 2009 all rights reserved, E&OE
11
www.enpirion.com
www.Da0t3a5S4h1eet.in
5/29/2009
Rev:A
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet EP5358HUI.PDF ] | |
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