ADP5020CP-EVALZ Analog Devices Inc, ADP5020CP-EVALZ Datasheet - Page 22

no-image

ADP5020CP-EVALZ

Manufacturer Part Number
ADP5020CP-EVALZ
Description
EB PMU For Digital Imaging Module
Manufacturer
Analog Devices Inc
Datasheets

Specifications of ADP5020CP-EVALZ

Design Resources
Powering AD9272 with ADP5020 Switching Regulator PMU for Increased Efficiency (CN0135)
Main Purpose
DC/DC, Step Down with LDO
Outputs And Type
3, Non-Isolated
Voltage - Output
3.3V, 1.2V, 1.8V
Current - Output
600mA, 250mA, 150mA
Voltage - Input
2.4 ~ 5.5 V
Regulator Topology
Buck
Frequency - Switching
3MHz
Board Type
Fully Populated
Utilized Ic / Part
ADP5020
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
ADP5020
LDO INPUT FILTER
To improve the LDO input-to-output ripple suppression in the
critical switching frequency range of the buck converters, it may be
necessary to add an LC filter tuned to 1 MHz, as shown in
Figure 28. Additional tests and simulation must be performed
to assess if this filter is necessary.
The filter resonance frequency is determined by the following
equation:
where L3 = 250 nH, assuming that f
The inductor must be able to withstand the LDO load current,
including the overload condition, which is limited to 400 mA.
f
LC
=
2
×
π
×
1
L3
×
C8
LC
= 1 MHz and C8 = 100 nF.
Rev. 0 | Page 22 of 28
(3)
VBATT
10µF
C1
Figure 28. Optional LDO Input Filter
ADP5020
BUCK 1
LDO
VOUT1
VOUT1
VDD3
VOUT3
10µF
SW1
C6
1µF
C3
L1
2.2µH
0.1µF
L3
C8
3.3V
2.8V
INPUT FILTER
LDO

Related parts for ADP5020CP-EVALZ