AME1117BCBT

更新时间： 2024-01-22 02:37:45

品牌	Logo	应用领域
安茂微 - AME		稳压器
页数	文件大小	规格书
15页	131K
描述
1A Low Dropout Positive Voltage Regulator

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AME1117BCBT 技术参数

是否Rohs认证：	不符合	生命周期：	Contact Manufacturer
包装说明：	, SOT-223	Reach Compliance Code：	compliant
风险等级：	5.67	可调性：	FIXED
标称回动电压 1：	1.2 V	最大绝对输入电压：	18 V
最大电网调整率：	0.0036%	最大负载调整率：	0.018%
输出次数：	1	端子数量：	3
工作温度TJ-Max：	70 °C	工作温度TJ-Min：
最大输出电流 1：	1 A	标称输出电压 1：	1.8 V
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SOT-223
认证状态：	Not Qualified	子类别：	Other Regulators
表面贴装：	YES	技术：	BIPOLAR
最大电压容差：	2%	Base Number Matches：	1

AME1117BCBT 数据手册

Analog Microelectronics, Inc.

1A Low Dropout Positive

Voltage Regulator

AME1117

n Application Descriptions

1. Output voltage adjustment

3. Current Limit Protection

AME1117 is protected against overload conditions.

Current protection is triggered at typically 1.5A.

Like most regulators, the AME1117 regulates the

output by comparing the output voltage to an inter-

nally generated reference voltage. On the adjust-

able version, the V_REFis available externally as

1.25V between V_OUTand ADJ. The voltage ratio

formed by R1 and R2 should be set to conduct

10mA (minimum output load). The output voltage

is given by the following equation:

4. Stability and Load Regulation

AME1117 requires a capacitor from VOUT to GND

to provide compensation feedback to the internal

gain stage. This is to ensure stability at the output

terminal. Typically, a 10µF tantalum or 50µF alu-

minum electrolytic is sufficient.

) + I^{AD J}x R2

^OUT= V^{R EF}(1+

Note: It is important that the ESR for this

capacitor does not exceed 0.5Ω.

On fixed versions of AME1117, the voltage divider

is provided internally.

The output capacitor does not have a theoretical

upper limit and increasing its value will increase

stability. C_OUT= 100µF or more is typical for high

current regulator design.

V_OUT

V_IN

OUT

ADJ

C₁

V_REF

For the adjustable version, the best load regulation

is accomplished when the top of the resistor di-

vider (R1) is connected directly to the output pin of

the AME1117. When so connected, R_Pis not mul-

tiplied by the divider ratio.

I_ADJ

For fixed output versions, the top of R1 is internally

connected to the output. The ground pin can be

connected to the low side of the load in order to

eliminate ground loop errors.

) + I_ADJx R2

V_OUT= V_REF(1+

Figure 4

2. Thermal protection

R_P

Parasitic

Line Resistance

AME1117 has thermal protection which limits

junction temperature to 150^OC. However, device

functionality is only guaranteed to a maximum

junction temperature of +125^OC.

V_IN

O U T

ADJ

The power dissipation and junction temperature

for AME1117 in DPAK package are given by

R_L

(Connect

R1 to case)

P_D= (V_IN- V_OUT) x I_OUT

T_JUNCTION= T_AMBIENT+ ( P_Dx θ_JA)

Note: T_JUNCTIONmust not exceed 125^OC

Connect

R2 to load

Figure 5

1...6 7 8910 11 12...15

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与AME1117BCBT相关器件

型号	品牌	描述	获取价格	数据表
AME1117BCBTZ	AME	1A Low Dropout Positive Voltage Regulator	获取价格
AME1117BCCT	AME	1A Low Dropout Positive Voltage Regulator	获取价格
AME1117BCCTZ	AME	1A Low Dropout Positive Voltage Regulator	获取价格
AME1117BCGT	AME	1A Low Dropout Positive Voltage Regulator	获取价格
AME1117BCGTZ	AME	1A Low Dropout Positive Voltage Regulator	获取价格
AME1117CCBT	AME	1A Low Dropout Positive Voltage Regulator	获取价格

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