ADP2164-EVALZ Analog Devices, ADP2164-EVALZ Datasheet - Page 16

• Manufacturer Part Number: ADP2164-EVALZ
• Description: Power Management IC Development Tools LFCSP Adjustable Eval Board
• Manufacturer: Analog Devices
• Type: DC/DC Converters, Regulators & Controllersr
• Series: ADP2164r

Specifications of ADP2164-EVALZ

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: ADP2164
• Input Voltage: 2.7 V to 6.5 V
• Output Voltage: 0.6 V to 6.5 V
• Description/function: 4 A, synchronous, step-down DC to DC regulator
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Output Current: 4 A
• Factory Pack Quantity: 1
• For Use With: ADP2164

ADP2164
APPLICATIONS INFORMATION
ADISIMPOWER DESIGN TOOL
The
ADIsimPower
power designs optimized for a specific design goal. The tools
enable the user to generate a full schematic, bill of materials,
and calculate performance in minutes.
optimize designs for cost, area, efficiency, and parts count
while taking into consideration the operating conditions and
limitations of the IC and all real external components. For
more information about
www.analog.com/ADIsimPower. The tool set is available from
this website, and users can also request an unpopulated board
through the tool.
The typical application circuit for the
Figure 38.
OUTPUT VOLTAGE SELECTION
The output voltage of the adjustable version of the
set by an external resistive voltage divider using the following
equation:
To limit output voltage accuracy degradation due to FB bias
current (0.1 µA maximum) to less than 0.5% (maximum),
ensure that R
INDUCTOR SELECTION
The inductor value is determined by the operating frequency,
input voltage, output voltage, and ripple current. A small inductor
value provides larger inductor current ripple and fast transient
response but degrades efficiency; a large inductor value provides
small inductor current ripple and good efficiency but slows
transient response. For a reasonable trade-off between transient
response and efficiency, the inductor current ripple, ΔI
set to one-third the maximum load current. The inductor value
is calculated using the following equation:
R
10kΩ
BOT
ADP2164
V
OUT
R
10kΩ
1
2
3
4
TOP
10kΩ
R2
SYNC
RT
TRK
FB
PGOOD
=
GND PGND PGND PGND
16
5
0
BOT
ADP2164ACPZ
6 .
is supported by
is a collection of tools that produce complete
15
×
Figure 38. Typical Application Circuit
is less than 30 kΩ.
6
EN




1
14
VIN
+
7
R
R
ADIsimPower
C1
0.1µF
TOP
BOT
10Ω
R1
8
13
PVIN
PVIN
SW
SW
SW




L: MSS1048-801NL COILCRAFT
C
C
C
IN
OUT1
OUT2
ADIsimPower
: C3225X5R1A476M TDK
12
11
10
9
: C3225X5R0J476M TDK
: C3225X5R0J107M TDK
0.8µH
L
ADP2164
ADIsimPower
C
47µF
X5R
10V
design tools, refer to
IN
C
47µF
X5R
6.3V
OUT1
design tool set.
V
3.3V
IN
is shown in
C
100µF
X5R
6.3V
ADP2164
OUT2
L
, is typically
can
V
1.2V
4A
OUT
Rev. A | Page 16 of 20
is
where:
V
V
ΔI
f
D is the duty cycle (V
The
loop to prevent subharmonic oscillations when the duty cycle
is larger than 50%. The internal slope compensation limits the
minimum inductor value.
The negative current limit (−1.3 A) also limits the minimum
inductor value. The inductor current ripple (ΔI
the selected inductor should not exceed 2.6 A.
The peak inductor current should be kept below the peak current
limit threshold and is calculated using the following equation:
Ensure that the rms current of the selected inductor is greater
than the maximum load current and that its saturation current
is greater than the peak current limit of the converter.
OUTPUT CAPACITOR SELECTION
The output capacitor value is determined by the output voltage
ripple, load step transient, and loop stability. The output ripple
is determined by the ESR and the capacitance.
The load step transient response depends on the inductor, the
output capacitor, and the current control loop.
The
power design. Table 5 and Table 6 show the recommended
values for inductors and capacitors for the
on the input and output voltages for the part. X5R or X7R
dielectric ceramic capacitors are highly recommended.
Table 5. Recommended L and C
V
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
5
S
IN
IN
OUT
is the switching frequency.
L
(V)
is the inductor current ripple.
is the input voltage.
ADP2164
ADP2164
is the output voltage.
L
I
∆
PEAK
V
=
OUT
(
V
=
IN
=
I
∆
O
−
∆
uses slope compensation in the current control
has integrated loop compensation for simple
I
V
1.0
1.2
1.5
1.8
2.5
1.0
1.2
1.5
1.8
2.5
3.3
V
+
I
L
OUT
L
OUT
×
∆
×
2
I
(V)
f




L
)
S
OUT
ESR
×
D
/V
+
IN
).
8
L (µH)
0.8
0.8
1
1
1
0.8
0.8
1
1
1
1
×
C
OUT
OUT
1
Values at f
×
f
S
ADP2164




C
100 + 100
100 + 47
100 + 47
100
47
100 + 100
100 + 47
100 + 47
100
47
47
Data Sheet
L
OUT
) calculated by
S
= 1.2 MHz
(µF)
based