ST1S10 datasheet(4/26 Pages) STMICROELECTRONICS

Part #	ST1S10

Description	3 A, 900 kHz, monolithic synchronous step-down regulator

PDF	26 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Pin configuration

ST1S10

4/26

Pin configuration

Figure 2.

Pin connections (top view for PowerSO-8, bottom view for DFN8)

PowerSO-8

DFN8 (4x4)

Table 2.

Pin description

Pin n°

Symbol

Name and function

1VIN_A

Analog input supply voltage to be tied to VIN supply source

INH (EN)

Inhibit pin active low. Connect to VIN_A if not used

3VFB

Feedback voltage for connection to external voltage divider to set the VOUT

from 0.8V up to 0.85*VIN_SW. (see output voltage selection paragraph 5.5)

AGND

Analog ground

SYNC

Synchronization and frequency select. Connect SYNC to GND for 900 kHz

operation, or to an external clock from 400 kHz to 1.2 MHz. (see Sync

operation paragraph 5.8.1)

6VIN_SW

Power input supply voltage to be tied to VIN power supply source

Switching node to be connected to the inductor

PGND

Power ground

epad

Exposed pad to be connected to ground

ST1S10 Datasheet(PDF) 4 Page - STMicroelectronics