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| 型号： | ADP2164ACPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 16LFCSP |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 6.5 V |
| 输入电压： | 2.7 V ~ 6.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 500kHz ~ 1.4MHz |
| 电流 - 输出： | 4A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘，CSP |
| 包装： | 标准包装 |
| 供应商设备封装： | 16-LFCSP-WQ（4x4） |
| 其它名称： | ADP2164ACPZ-R7DKR |
ADP2164
Data Sheet
APPLICATIONS INFORMATION
ADISIMPOWER DESIGN TOOL
The ADP2164 is supported by ADIsimPower design tool set.
L =
( V IN ? V OUT ) × D
? I L × f S
10?
C1 C IN 3.3V
10k?
10V
L
V OUT
ADP2164ACPZ C OUT1 C OUT2
3
10
TRK
SW
6.3V
6.3V
I PEAK = I O +
ADIsimPower is a collection of tools that produce complete
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. ADIsimPower can
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 ADIsimPower design tools, refer to
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 ADP2164 is shown in
R1
V IN
R2
0.1μF 47μF
X5R
16 15 14 13
PGOOD EN VIN PVIN
1 12
SYNC PVIN
0.8μH
2 11
RT SW 1.2V
4A
47μF 100μF
X5R X5R
4 9
FB SW
GND PGND PGND PGND
where:
V IN is the input voltage.
V OUT is the output voltage.
ΔI L is the inductor current ripple.
f S is the switching frequency.
D is the duty cycle (V OUT /V IN ).
The ADP2164 uses slope compensation in the current control
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 L ) calculated by
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:
? I L
2
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
R BOT
10k?
R TOP
10k?
5
6
7
8
L: MSS1048-801NL COILCRAFT
C IN : C3225X5R1A476M TDK
C OUT1 : C3225X5R0J476M TDK
C OUT2 : C3225X5R0J107M TDK
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.
R TOP
?
V OUT = 0 . 6 × ? ? 1 +
R BOT
?
?
1
? V OUT = ? I L × ? ESR +
?
8 × C OUT × f S ? ?
?
Figure 38. Typical Application Circuit
OUTPUT VOLTAGE SELECTION
The output voltage of the adjustable version of the ADP2164 is
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 BOT is less than 30 k?.
? ?
?
The load step transient response depends on the inductor, the
output capacitor, and the current control loop.
The ADP2164 has integrated loop compensation for simple
power design. Table 5 and Table 6 show the recommended
values for inductors and capacitors for the ADP2164 based
on the input and output voltages for the part. X5R or X7R
dielectric ceramic capacitors are highly recommended.
Table 5. Recommended L and C OUT Values at f S = 1.2 MHz
V IN (V) V OUT (V) L (μH ) C OUT (μF)
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 L , is typically
set to one-third the maximum load current. The inductor value
is calculated using the following equation:
3.3
3.3
3.3
3.3
3.3
5
5
5
5
5
5
1.0
1.2
1.5
1.8
2.5
1.0
1.2
1.5
1.8
2.5
3.3
0.8
0.8
1
1
1
0.8
0.8
1
1
1
1
100 + 100
100 + 47
100 + 47
100
47
100 + 100
100 + 47
100 + 47
100
47
47
Rev. A | Page 16 of 20
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