STBP120 datasheet(6/36 Pages) STMICROELECTRONICS

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Description

STBP120

6/36

Doc ID 15492 Rev 4

Description

The STBP120 device provides overvoltage protection for input voltage up to +28 V. Its low

RDS(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 RDS(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)

Pin 1, PAD1 and PAD2 are No Connect (NC) and may be tied to IN or GND.

AM00240

STBP120

GND

OUT

FLT

AM00239

OUT

GND

OUT

FLT

PAD1

PAD2

STBP120 Datasheet(PDF) 6 Page - STMicroelectronics