AME8805AEGT

更新时间： 2024-01-21 16:50:55

品牌	Logo	应用领域
安茂微 - AME		/
页数	文件大小	规格书
12页	181K
描述
600mA CMOS LDO

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AME8805AEGT 技术参数

是否Rohs认证：	符合	生命周期：	Contact Manufacturer
包装说明：	, SOT-223	Reach Compliance Code：	compliant
风险等级：	5.84	可调性：	FIXED
标称回动电压 1：	1.4 V	最大绝对输入电压：	8 V
最大电网调整率：	0.00285%	最大负载调整率：	0.019%
输出次数：	1	端子数量：	3
工作温度TJ-Max：	125 °C	工作温度TJ-Min：	-40 °C
最大输出电流 1：	0.6 A	标称输出电压 1：	1.9 V
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SOT-223
包装方法：	TAPE AND REEL	认证状态：	Not Qualified
子类别：	Other Regulators	表面贴装：	YES
技术：	CMOS	最大电压容差：	1.5%

AME8805AEGT 数据手册

AME, Inc.

600mA CMOS LDO

AME8805 / 8810

n Detailed Description

n External Capacitors

The AME8805/8810 family of CMOS regulators con-

tain a PMOS pass transistor, voltage reference, error am-

plifier, over-current protection, and thermal shutdown.

The AME8805/8810 is stable with an output capacitor

to ground of 2.2µF or greater. Ceramic capacitors have

the lowest ESR, and will offer the best AC performance.

Conversely, Aluminum Electrolytic capacitors exhibit the

highest ESR, resulting in the poorest AC response. Un-

fortunately, large value ceramic capacitors are compara-

tively expensive. One option is to parallel a 0.1µF ce-

ramic capacitor with a 10µF Aluminum Electrolytic. The

benefit is low ESR, high capacitance, and low overall

cost.

The P-channel pass transistor receives data from the

error amplifier, over-current shutdown, and thermal pro-

tection circuits. During normal operation, the error am-

plifier compares the output voltage to a precision refer-

ence. Over-current and Thermal shutdown circuits be-

come active when the junction temperature exceeds

150^oC, or the current exceeds 600mA. During thermal

shutdown, the output voltage remains low. Normal op-

eration is restored when the junction temperature drops

below 120^oC.

A second capacitor is recommended between the in-

put and ground to stabilize Vin. The input capacitor should

be at least 0.1µF to have a beneficial effect.

The AME8805/8810 switches from voltage mode to cur-

rent mode when the load exceeds the rated output cur-

rent. This prevents over-stress. The AME8805/8810 also

incorporates current foldback to reduce power dissipa-

tion when the output is short circuited. This feature be-

comes active when the output drops below 0.8 volts, and

reduces the current flow by 65%. Full current is restored

when the voltage exceeds 0.8 volts.

All capacitors should be placed in close proximity to

the pins. A "Quiet" ground termination is desirable. This

can be achieved with a "Star" connection.

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