参数资料
型号: ADP2164ACPZ-R7
厂商: Analog Devices Inc
文件页数: 17/20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:
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
Data Sheet
Table 6. Recommended L and C OUT Values at f S = 600 kHz
V IN (V) V OUT (V) L (μH ) C OUT (μF)
3.3 1.0 1 100 + 100
3.3 1.2 1 100 + 100
ADP2164
VOLTAGE TRACKING
The ADP2164 includes a tracking feature that allows the
ADP2164 output (slave voltage) to be configured to track
an external voltage (master voltage), as shown in Figure 39.
3.3
1.5
1
100 + 47
V MASTER
3.3
3.3
5
5
1.8
2.5
1.0
1.2
1
1
1
1.5
100 + 47
100
100 + 100
100 + 100
R TRKT
R TRKB
TRK
ADP2164
R TOP
V SLAVE
5
5
1.5
1.8
1.5
1.5
100 + 47
100 + 47
FB
R BOT
5
5
2.5
3.3
1.5
1.5
100
100
Figure 39. Voltage Tracking
Higher or lower values of inductors and output capacitors can
be used in the regulator, but system stability and load transient
performance must be verified.
Table 7 and Table 8 list some recommended inductors and
capacitors for the ADP2164 .
Table 7. Recommended Inductors
Coincident Tracking
A common requirement is coincident tracking, as shown in
Figure 40. Coincident tracking limits the slave output voltage
to the same value as the master voltage until the slave output
voltage reaches regulation. Connect the TRK pin to a resistor
divider driven from the master voltage, as shown in Figure 39.
For coincident tracking, set R TRKT = R TOP and R TRKB = R BOT .
Manufacturer
Coilcraft?
Sumida
Part No.
MSS1038, MSS1048, MSS1260
CDRH103R, CDRH104R, CDRH105R
V MASTER
V SLAVE
VOLTAGE
Table 8. Recommended Capacitors
Manufacturer
Part No.
Description
Murata
Murata
TDK
TDK
GRM32ER60J107ME20
GRM32ER60J476ME20
C3225X5R0J107M
C3225X5R0J476M
100 μF, 6.3 V, X5R, 1210
47 μF, 6.3 V, X5R, 1210
100 μF, 6.3 V, X5R, 1210
47 μF, 6.3 V, X5R, 1210
TIME
Figure 40. Coincident Tracking
Ratiometric Tracking
Ratiometric tracking is shown in Figure 41. The slave output is
INPUT CAPACITOR SELECTION
The input capacitor reduces the input voltage ripple caused by
the switch current on PVIN. Place the input capacitor as close
limited to a fraction of the master voltage. In this application, the
slave and master voltages reach their final values at the same time.
V MASTER
as possible to the PVIN pins. A 22 μF or 47 μF ceramic capacitor
is recommended. The rms current rating of the input capacitor
should be larger than the value calculated using the following
equation:
VOLTAGE
V SLAVE
I RMS = I O × D × ( 1 ? D )
where D is the duty cycle.
TIME
Figure 41. Ratiometric Tracking
The ratio of the slave output voltage to the master voltage is a
function of the two dividers.
V SLAVE
V MASTER
=
1 +
1 +
R TOP
R BOT
R TRKT
R TRKB
Rev. A | Page 17 of 20
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