EP5368QI Enpirion, EP5368QI Datasheet - Page 10

• Manufacturer Part Number: EP5368QI
• Description: Switching Converters, Regulators & Controllers 600mA BUCK REGULATOR INTEGRATED INDUCTOR
• Manufacturer: Enpirion

Specifications of EP5368QI

• Output Voltage: 0.8 V to 3.3 V
• Output Current: 600 mA
• Input Voltage: 2.4 V to 5.5 V
• Switching Frequency: 4 MHz
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Package / Case: QFN-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

External Voltage Divider
As described above, the external voltage
divider option is chosen by connecting the
VS0, VS1, and VS2 pins to V
The EP5368QI uses a separate feedback pin,
V
must be connected to V
Figure 5.
The output voltage is selected by the following
formula:
R
gain. Then R
V
to V
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03260
V
FB
OUT
a
IN
must be chosen as 200k to maintain loop
, when using the external divider.
VS2
Figure 5: External Divider Application Circuit
IN
0
0
0
0
1
1
1
1
can programmed over the range of 0.603V
4.7uF
-0.4V.
0603
Table 1 VID Voltage Select Settings
b
V
V
V
V
ENABLE
is given as:
OUT
S0
S1
S2
V
R
VS1
in
0
0
1
1
0
0
1
1
EP5368QI
b
V
. 0
. 1
OUT
GND
206
603
x
V
. 0
10
V
603
OUT
Sense
1
VS0
V
5
V
out
0
1
0
1
0
1
0
1
FB
IN
Ra
Rb
as indicated in
Ra
Rb
or logic “high”.
Selectable
1.25V
User
V
3.3V
2.5V
1.8V
1.5V
1.2V
0.8V
OUT
V
SENSE
V
22 F
0805
OUT
09/23/2010
10
Dynamically Adjustable Output
The EP5368QI is designed to allow for
dynamic switching between the predefined VID
voltage levels The inter-voltage slew rate is
optimized to prevent excess undershoot or
overshoot
transition. The slew rate is identical to the soft-
start slew rate and is provided in the electrical
characteristics table.
Dynamic transitioning between internal VID
settings and the external divider is not allowed.
Input and Output Capacitors
The input capacitance requirement is 4.7uF
0603 MLCC. The input capacitor must be a
X5R/X7R MLCC. Y5V or equivalent dielectric
formulations lose capacitance with frequency,
bias, and with temperature, and are not
suitable for switch-mode DC-DC converter
input filter applications.
The
approximately 20uF. Enpirion recommends a
single 22uF 0805 MLCC. Ripple performance
can be improved by using 2 x 10uF 0805 MLC
capacitors.
As described in the Soft Start section, there is
a limitation on the maximum bulk capacitance
that can be placed on the output of this device.
Please refer to that section for more details.
The output capacitor must be a X5R/X7R or
equivalent MLCC. Y5V or equivalent dielectric
formulations lose capacitance with frequency,
bias, and temperature and are not suitable for
switch-mode DC-DC converter output filter
applications.
Please consult Enpirion Applications Support
for other capacitor case size combinations.
Operation at 700mA Output Current
Operation at 700mA is supported by using the
application circuit shown in Figure 6.
modification in the compensation is to ensure
stability over the entire set of input and output
voltage conditions.
output
as
capacitance
the
output
www.enpirion.com
requirement
voltage
EP5368QI
levels
Rev: F
The
is