LD39200 datasheet(13/30 Pages) STMICROELECTRONICS

部品番号	LD39200

部品情報	Reverse current protection

PDF	30 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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13 / 30 page

LD39200

Application information

DocID025637 Rev 1

13/30

6.6

Reverse current protection

The device avoids the reverse current to flow from the output to the input during any

operating condition (EN=0 or EN=1, VIN>VOUT+VDROP). During fast turn-on/off this function

prevents a big current from flowing to the input. Moreover it is used to avoid the reverse

current to flow from the output pin to the input one, when other power supplies, providing a

voltage higher than the input voltage, are connected to the output pin. If a power supply,

providing a voltage lower than LDO output voltage, is connected to OUT pin, LDO works in

current protection, causing high power dissipation inside the device.

When the device is disabled (EN=low) and VOUT>0 V, a small current (few µA) is sunk from

the OUT pin.

LD39200 データシート(PDF) 13 Page - STMicroelectronics