ST1S41 datasheet(3/27 Pages) STMICROELECTRONICS

Part #	ST1S41

Description	850 kHz switching frequency

PDF	27 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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DocID023654 Rev 2

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ST1S41

Pin settings

1.1

Pin connection

Figure 2. Pin connection (top view)

1.2

Pin description

VINA

GND

PGND

VINSW

VFQFPN

HSOP8

AM15059v1

Table 1. Pin description

Type

Description

VINA

Unregulated DC input voltage

2EN

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 (ST1S41Ixx).

3FB

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 FB pin.

AGND

Ground

Can be connected to ground

VINSW

Power input voltage

Regulator output switching pin

PGND

Power ground

ePAD

Ground

ST1S41 Datasheet(PDF) 3 Page - STMicroelectronics