Datasheet > XR71211EHMTR-F

XR71211EHMTR-F

更新时间： 2024-02-19 11:12:14

品牌	Logo	应用领域
艾科嘉 - EXAR		输出元件调节器
页数	文件大小	规格书
12页	1563K
描述
1.5A Ultra Low Dropout Voltage Regulator

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技术参数
数据手册

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XR71211EHMTR-F 技术参数

生命周期：	Obsolete	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.82	Is Samacsys：	N
调节器类型：	ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR	Base Number Matches：	1

XR71211EHMTR-F 数据手册

XR71211

Power Good Flag

Thermal Protection and Shutdown

The XR71211 features a Power Good Flag output signaling

an abnormal operating condition. A low voltage on the

Power Good Flag output indicates:

The XR71211 includes a thermal shutdown circuitry in

order to restrict the device’s operating temperature within a

safe operating range. When activated, typically at 160°C,

the XR71211 is forced into a low power reset state with a

typical hysteresis of 30°C.

• Output voltage VOUT is approximately 9% below its

expected value

Combined with the short circuit current protection, it

reduces and limits the heating effects of over-temperature

and/or over-current conditions on the LDO and surrounding

circuits.

• A thermal fault has occurred

The Power Good Flag output, is an open collector capable

of sinking in excess of 1mA.

Output Current Limit Protection

Reverse Bias Protection

The XR71211 integrates output current limit protection in

order to protect the system main power supply, the regula-

tor itself and the load from excessive current flow. This cur-

rent limit effectively keeps the flow of current in the circuit at

a safe level.

In addition to the standard protection features in these

devices, they also incorporate a reverse bias protection.

Most LDOs have a parasitic body diode that provides a

path from VOUT to VIN if the input is shorted to ground.

The XR71211 has a blocking diode to ensure that no high

discharge currents can occur between the output and the

input when the input is shorted to ground.

In short circuit conditions, the device will take additional

steps to limit input and power by disabling and re-enabling

the pass device until the short condition is removed and

normal operation can resume. Depending on the imped-

ance of the short, this short circuit protection function may

initiate operation between 10% and 50% of the targeted

output voltage.

9 / 12

exar.com/XR71211

Rev 1B

1...6 7 8910 11 12

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