ST1S40 datasheet(3/29 Pages) STMICROELECTRONICS

Nome de Peças	ST1S40

Descrição Electrónicos	3 A DC step-down switching regulator

PDF	29 Pages

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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DocID17928 Rev 5

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ST1S40

Pin settings

1.1

Pin connection

1.2

Pin description

Figure 2. Pin connection (top view)

VINA

GND

PGND

VINSW

VINA

GND

PGND

VINSW

AGND

VFQFPN

VINA

GND

PGND

VINSW

HSOP8

SO8-BW

HSOP-8

Table 1. Pin description

No.

Type

Description

VFQFPN

and HSOP-8

S08-BW

VINA Unregulated DC input voltage

Enable input. With EN higher than 1.2 V the device in ON and with EN lower

than 0.4 V the device is OFF (ST1S40Ixx).

Feedback input. Connecting the output voltage directly to this pin the output

voltage is regulated at 0.8 V. To have higher regulated voltages an external

resistor divider is required from Vout to the FB pin.

AGND Ground

It can be connected to ground

VINSW Power input voltage

Regulator output switching pin

PGND Power ground

Ground

ePad

Exposed pad mandatory connected to ground

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