参数资料
型号: ADP2504ACPZ-3.5-R7
厂商: Analog Devices Inc
文件页数: 14/16页
文件大小: 0K
描述: IC REG BUCK BST SYNC 1A 10LFCSP
产品变化通告: Reliability Change 27/Apr/2012
标准包装: 1
类型: 降压(降压),升压(升压)
输出类型: 固定
输出数: 1
输出电压: 3.5V
输入电压: 2.3 V ~ 5.5 V
PWM 型: 电流模式
频率 - 开关: 2.5MHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘,CSP
包装: 标准包装
供应商设备封装: 10-LFCSP-WD(3x3)
其它名称: ADP2504ACPZ-3.5-R7DKR
ADP2503/ADP2504
Table 6. Recommended Output Capacitors
Dimensions
Data Sheet
Vendor
Murata
TDK
Murata
TDK
TDK
Murata
Value
2 × 10 μF, 6.3 V
2 × 10 μF, 6.3 V
22 μF, 6.3 V
22 μF, 6.3 V
22 μF, 10 V
2 × 10 μF, 10 V
Part No.
GRM188R60J106ME47
C1608JB0J106K
GRM21BR60J226ME39
C2012X5R0J226M
C3216X5R1A226K
GRM21BR71A106KE51L
L × W × H (mm)
1.6 × 0.8 × 0.8 (2)
1.6 × 0.8 × 0.8 (2)
2 × 1.25 × 1.25
2 × 1.25 × 1.25
2 × 1.25 × 1.25
2 × 1.25 × 1.25 (2)
3 . 0 V = ?
? × 0 . 5 V
Input Capacitor Selection
The ADP2503/ADP2504 require an input capacitor to filter
noise on the VIN pin, and provide the transient currents while
maintaining constant input and output voltage. A 10 μF X5R/
X7R ceramic capacitor rated for 6.3 V is the minimum recom-
mended input capacitor. Increased input capacitance reduces
the amplitude of the switching frequency ripple on the battery.
Because of the dc bias characteristics of ceramic capacitors, a
An example of the calculation for a required output voltage of
3.0 V follows.
? 360 k ? ?
? ?
? 60 k ? ?
1.5μH
0603, 6.3 V, X5R/X7R, 10 μF ceramic capacitor is preferable.
SW1
SW2
Table 7. Recommended Input Capacitors
Vendor Value Part No.
Murata
10 μF, 6.3 V
GRM188R60J106ME47
TDK
10 μF, 6.3 V
C1608JB0J106K
Dimensions
L×W×H
(mm)
1.6 × 0.8 × 0.8
1.6 × 0.8 × 0.8
V IN
2.3V TO 5.5V
10μF
ADP2503/ADP2504
PVIN VOUT
VIN FB
SYNC
R1
R2
V OUT
2.8V TO 5V
20μF
OUTPUT VOLTAGE PROGRAMMING
The ADP2503/ADP2504 have an adjustable model where the
output is programmed through an external resistor divider.
The resistor divider is connected between VOUT and FB and
EN
ON
OFF
AGND PGND
between FB and GND, and the combined total for the resistor
divider should be kept close to 400 k?. The typical voltage
reference (V REF ) is 500 mV and depending on the output voltage
required, the following equation can be used to calculate the
value of the resistors:
Figure 30. Typical Application Circuit for the Adjustable ADP2503/ADP2504
V OUT = ?
? R 1 + R 2 ?
? × V
? R 2 ?
? ?
REF
Rev. C | Page 14 of 16
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