STBP120 Datasheet, PDF (8/36 Pages) STMicroelectronics – Overvoltage protection device with thermal shutdown

Pin descriptions
STBP120
2.4
Enable input (EN)
This logical input (active-low) can be used to enable or disable the device. When EN input is
driven high, the STBP120 enters the standby mode and the power output is disconnected
from the input. When EN input is driven low and all operating conditions are within specified
limits, the power output is connected to the input.
Since the EN input has no internal pull-down resistor, its logical level must be defined by the
controller or by an external resistor. If there is no need to use this input, it should be
connected to the GND.
To improve safety and to prevent damage to application circuits in the event of extreme
voltage or current conditions, an optional protective resistor R_EN can be connected between
the EN input and the controller output. The suitable resistor value is in range of 22 kΩ to
100 kΩ.
The EN input level has no impact on the functionality of FLT output (see Figure 8 and
Figure 9).
2.5
No Connect (NC)
Pins 1, 8, 9 and exposed pads PAD1, PAD2 are No Connect. Pin 1 and exposed pads PAD1,
PAD2 may be tied to IN or GND if necessary.
2.6
Ground (GND)
Ground. All voltages are referenced to GND.
Table 1. Pin description and signal names
Pin
Name
Type
Function
1, PAD1, PAD2
2
NC
GND
—
Supply
No Connect. May be tied to IN or GND.
Ground
3
FLT
Output
Fault indication output (open-drain)
4, 5
IN
Input / supply
Input voltage
6, 7
OUT
Output
Output voltage
8, 9
NC
—
No Connect
10
EN
Input
Enable input (no internal pull-down resistor)
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Doc ID 15492 Rev 4