ST3M01

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CONNECTION DIAGRAM (top view)

PIN DESCRIPTION

Pin N°

Symbol

Name and Function

1

GND SW

Switching Ground. Must be low impedance; solder directly to GND plane

2

GND SW

Switching Ground. Must be low impedance; solder directly to GND plane

3

Virtual GND

Virtual GND. Open Drain N-Cnannel MOSFET: must be high impedance when the

Low Battery condition is detected.

4

LBO

Low Battery Output. Open Drain N-Cnannel MOSFET: sinks current when the

input voltage drops below 2V typically.

Reference Voltage Output. Bypass with 0.1

µF to improve the linears V

REF

thermal noise performance

.

6

IN Linear

Linear Input. Must be connected togheter with IN SW to the input supply.

Linear B Output port. 1.9V typically.

8

SHDN

referencevoltage and the low batery comparator remain active.

9

GND Signal

Signal GND. Must be connected togheter with the Switching Ground.

10

Linear A Output port. 3V typically.

11

OUT DC/DC

DC/DC Output Port: 3.3V typically.

12

IN SW

SMPS Input. Must be connected togheter with IN_Linear to the input supply.

13

LX

1.5A N-Channel Power MOSFET Drain.

14

LX

1.5A N-Channel Power MOSFET Drain.