Datasheet

DocID023654 Rev 2 3/27
ST1S41 Pin settings
1 Pin settings
1.1 Pin connection
Figure 2. Pin connection (top view)
1.2 Pin description
1
45
8
VINA
EN
FB
GND
PGND
SW
VINSW
NC
EN
NC
VFQFPN HSOP8
2
3
6
7
9
9
AM15059v1
Table 1. Pin description
N. Type Description
1 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.
4 AGND Ground
5 NC Can be connected to ground
6 VINSW Power input voltage
7 SW Regulator output switching pin
8 PGND Power ground
9 ePAD Ground