STBP120 Datasheet, PDF (6/36 Pages) STMicroelectronics – Overvoltage protection device with thermal shutdown

Description
1
Description
STBP120
The STBP120 device provides overvoltage protection for input voltage up to +28 V. Its low
R_DS(on) N-channel MOSFET switch protects the systems connected to the OUT pin against
failures of the DC power supplies in accordance with the China MII Communications
Standard YD/T 1591-2006.
In the event of an input overvoltage condition, the device immediately disconnects the DC
power supply by turning off an internal low R_DS(on) N-channel MOSFET to prevent damage
to protected systems.
In addition, the device also monitors its own junction temperature and switches off the
internal MOSFET if the junction temperature exceeds the specified limit.
The device can be controlled by the microcontroller and can also provide status information
about fault conditions.
The STBP120 is offered in a small, RoHS-compliant TDFN – 10-lead (2.5 mm x 2 mm)
package.
Figure 1. Logic diagram
IN
OUT
STBP120
EN
FLT
Figure 2. Pinout⁽¹⁾
GND
NC 1
GND 2
FLT 3
IN 4
IN 5
PAD1
PAD2
10 EN
9 NC
8 NC
7 OUT
6 OUT
6/36
1. Pin 1, PAD1 and PAD2 are No Connect (NC) and may be tied to IN or GND.
Doc ID 15492 Rev 4
AM00240
AM00239