L6982 datasheet(24/48 Pages) STMICROELECTRONICS

部件名	L6982

功能描述	38 V, 2 A synchronous step-down converter with low quiescent current

PDF	48 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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24 / 48 page

Application notes

8.1

Programmable power up threshold

The Enable rising threshold is equal to 1.2 V typical (refer to Table 6). The power up threshold is adjusted

accordingly with the following equation: VPower Up=1.2∙ 1+REN HREN L

(24)

Figure 26. Leading network example

(*) Synchronization is allowed only for LNM versions.

The Enable falling threshold is equal to 1.0 V typical (refer to Electrical characteristics table). The turn off

threshold is obtained accordingly with the following equation:

VPower Down=1.0∙ 1+REN HREN L

(25)

8.2

External synchronization (only available for Low Noise Mode)

The device allows a direct connection between a clock source and the EN/CLKIN pin.

Figure 27. External synchronization. Direct connection

L6982

Application notes

DS13683 - Rev 1

page 24/48

L6982 数据表(PDF) 24 Page - STMicroelectronics