EP5358HUI Enpirion, EP5358HUI Datasheet - Page 11

• Manufacturer Part Number: EP5358HUI
• Description: DC/DC Switching Converters 500mA Sync Buck Conv Int Inductor, Hi VID
• Manufacturer: Enpirion

Specifications of EP5358HUI

• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Efficiency: 93 %
• Input / Supply Voltage (max): 6 V
• Input / Supply Voltage (min): - 0.3 V
• Load Regulation: 0.48 %
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Output Current: 500 mA
• Switching Frequency: 5 MHz
• Package / Case: QFN-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application Information
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.
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
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03541
Figure 7: Application Circuit, EP5358LUI, showing
V
V
IN
IN
Figure 6: Application Circuit, EP5358HUI,.
4.7 F
4.7 F
the V
ENABLE
V
V
V
PVIN
AVIN
ENABLE
V
V
V
PVIN
AVIN
S0
S1
S2
S0
S1
S2
FB
PGND
PGND
function.
AGND
VSENSE
AGND
VSENSE
VOUT
VOUT
VFB
10 F
This
10 F
V
V
OUT
OUT
09/23/2010
11
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 V
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 shows the VS2-VS0 pin logic states for
the EP5358LUI and the associated output
voltage levels.
connection to AVIN or to a “high” logic voltage
level.
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.
logic high and logic low is indeterminate.
EP5358LUI External Voltage Divider
The external divider option is chosen by
connecting VID pins VS2-VS0 to V
“1” or “high”. The EP5358LUI uses a separate
feedback pin, V
divider. V
indicated in figure 8.
Table 1: EP5358LUI VID Voltage Select Settings
A logic “0” indicates a connection to
VS2
0
0
0
0
1
1
1
1
SENSE
must be connected to V
FB
VS1
0
0
1
1
0
0
1
1
, when using the external
OUT
A logic “1” indicates a
EP5358LUI/EP5358HUI
Any level between the
settings and dynamic
VS0
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0
1
0
1
0
1
0
1
VOUT
IN
1.50
1.45
1.20
1.15
1.10
1.05
EXT
0.8
or a logic
OUT
Rev: D
as