Datasheet

Description STBP120
6/36 Doc ID 15492 Rev 5
1 Description
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
Figure 2. Pinout
(1)
1. Pin 1, PAD1 and PAD2 are No Connect (NC) and may be tied to IN or GND.
AM00240
STBP120
IN
GND
EN
OUT
FLT
AM00239
IN
EN
OUT
IN OUT
NC
GND NC
NC
OUT
FLT
1
2
3
4
5
10
9
8
7
6
PAD1
PAD2