L6982 datasheet(3/48 Pages) STMICROELECTRONICS

Part #	L6982

Description	38 V, 2 A synchronous step-down converter with low quiescent current

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Pin configuration

Figure 2. Pin connection (top view)

BOOT

VCC

FB/VOUT

EN/CLKIN(*)

AGND

VIN

PGND

(*) Synchronization is allowed for LNM versions only.

Table 1. Pin description

Pin #

Symbol

Function

Switching node.

BOOT

Connect an external capacitor (100 nF typ.) between BOOT and SW pins. The gate charge

required to drive the internal NMOS is refreshed during the low side switch conduction time.

VCC

This pin supplies the embedded analog circuitry. Connect a ceramic capacitor (≥ 1 µF) to filter

internal voltage reference.

FB/VOUT

FB is output voltage sensing with eternal voltage divider.

EN/CLKIN

Enable pin with internal voltage divider. Pull down/up to disable/enable the device.

In LNM versions, this pin is also used to provide an external clock signal, which synchronizes

the device.

AGND

Analog ground.

VIN

DC input voltage.

PGND

Power ground.

L6982

Pin configuration

DS13683 - Rev 1

page 3/48

L6982 Datasheet(PDF) 3 Page - STMicroelectronics