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ADP3308ART-2.5-RL PDF预览

ADP3308ART-2.5-RL

更新时间： 2024-02-28 13:39:23
品牌 Logo 应用领域
亚德诺 - ADI 线性稳压器IC调节器电源电路光电二极管输出元件
页数 文件大小 规格书
8页 118K
描述
IC VREG 2.5 V FIXED POSITIVE LDO REGULATOR, 0.17 V DROPOUT, PDSO5, SOT-23, 5 PIN, Fixed Positive Single Output LDO Regulator

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ADP3308ART-2.5-RL 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOT-23包装说明：SOT-23, 5 PIN
针数：5Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.72最大回动电压 1：0.17 V
最大输入电压：12 V最小输入电压：2.8 V
JESD-30 代码：R-PDSO-G5JESD-609代码：e0
长度：2.9 mm功能数量：1
端子数量：5工作温度TJ-Max：125 °C
工作温度TJ-Min：-55 °C最大输出电流 1：0.05 A
最大输出电压 1：2.555 V最小输出电压 1：2.445 V
标称输出电压 1：2.5 V封装主体材料：PLASTIC/EPOXY
封装代码：LSSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, LOW PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
座面最大高度：1.45 mm表面贴装：YES
端子面层：TIN LEAD端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：1.65 mm
Base Number Matches：1

ADP3308ART-2.5-RL 数据手册

 浏览型号ADP3308ART-2.5-RL的Datasheet PDF文件第2页浏览型号ADP3308ART-2.5-RL的Datasheet PDF文件第3页浏览型号ADP3308ART-2.5-RL的Datasheet PDF文件第4页浏览型号ADP3308ART-2.5-RL的Datasheet PDF文件第5页浏览型号ADP3308ART-2.5-RL的Datasheet PDF文件第6页浏览型号ADP3308ART-2.5-RL的Datasheet PDF文件第8页 
ADP3308  
The following general guidelines will be helpful when designing  
a board layout:  
Higher Output Current  
The ADP3308 can source up to 50 mA without any heatsink or  
pass transistor. If higher current is needed, an appropriate pass  
transistor can be used, as in Figure 4, to increase the output  
current to 1 A.  
1. PC board traces with larger cross section areas will remove  
more heat. For optimum results, use PC boards with thicker  
copper and or wider traces.  
MJE253*  
2. Increase the surface area exposed to open air so heat can be  
removed by convection or forced air flow.  
V
= 3.0V @ 1A  
V
= 4V TO 8V  
OUT  
IN  
R1  
C1  
47␮F  
50⍀  
3. Do not use solder mask or silk screen on the heat dissipating  
traces because it will increase the junction to ambient thermal  
resistance of the package.  
IN  
OUT  
C2  
10␮F  
ADP3308-3.0  
Shutdown Mode  
Applying a TTL high signal to the shutdown pin or tying it to  
the input pin will turn the output ON. Pulling the shutdown pin  
down to a TTL low signal or tying it to ground will turn the  
output OFF. In shutdown mode, quiescent current is reduced  
to less than 1 µA.  
SD  
GND  
*AAVID531002 HEAT SINK IS USED  
Figure 4. Higher Output Current Linear Regulator  
Constant Dropout Post Regulator  
APPLICATION CIRCUITS  
Crossover Switch  
The circuit in Figure 5 provides high precision with low dropout  
for any regulated output voltage. It significantly reduces the ripple  
from a switching regulator while providing a constant dropout  
voltage, which limits the power dissipation of the LDO to 30 mW.  
The ADP3000 used in this circuit is a switching regulator in the  
step-up configuration.  
The circuit in Figure 3 shows that two ADP3308s can be used  
to form a mixed supply voltage system. The output switches  
between two different levels selected by an external digital input.  
Output voltages can be any combination of voltages from the  
Ordering Guide of the data sheet.  
V
= 4V TO 12V  
V
= 3.0V/3.3V  
OUT  
IN  
IN  
OUT  
ADP3308-3.0  
OUTPUT SELECT  
SD  
GND  
4V  
0V  
IN  
OUT  
C1  
1.0␮F  
C2  
0.47␮F  
ADP3308-3.3  
SD  
GND  
Figure 3. Crossover Switch  
D1  
1N5817  
L1  
6.8␮H  
ADP3308-3.0  
OUT  
V
= 2.5V TO 3.5V  
IN  
3.0V@50mA  
IN  
C1  
100␮F  
10V  
SD  
R1  
120⍀  
C2  
100␮F  
10V  
R2  
30.1k⍀  
1%  
GND  
C3  
2.2␮F  
I
V
LIM  
IN  
SW1  
Q1  
2N3906  
Q2  
2N3906  
ADP3000-ADJ  
FB  
R3  
R4  
274k⍀  
GND  
SW2  
124k⍀  
1%  
Figure 5. Constant Dropout Post Regulator  
REV. B  
–7–  
1...45678

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