Datasheet

Pin descriptions STBP120
8/36 Doc ID 15492 Rev 5
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 NC — No Connect. May be tied to IN or GND.
2 GND Supply Ground
3FLT
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)