MELEXIS MLX12101E Datasheet

MLX12101

Sensor Protection IC

Features and Benefits

Small package (SOT-89)
Low dropout voltage (typical 30mV)
Large temperature rang e
Overvoltage protection
Reverse polarity protection
Low supply current

Applications

Sensor Overvoltage Protection
Sensor Reverse Polarity Protection

Ordering Information

Part No. Temperature Suffix Package Option Temperature Range

MLX12101 E SA N/A -40C to 85C Extended

Functional Diagram

IN OUT

BG

COMP

GND

MLX12101

Description

The MLX12101 serves as a protection circuit where
sensible 5V IC's are supplied by long wires that can
be short-circuited to the wiring harness of a car.
The IC is to be connected between a 5V supply, and
a 5V powered remote application. The IC is set on
the remote application side, its input receiving the
5V supply through the car wiring, and its output
delivering the 5V protected supply to the local
application.
When the input is below 5.5 Volt, the switch between
5V input and 5V output is closed and the application
is powered. When the 5V input goes above 6.8 Volt
(This case occurs when the supply wire is short­circuited to battery plus), the output is shut off. When
the chip input goes negative ( this is the case when
the battery is reversed), a reverse polarity diode
prevents the output of going negative.

MLX12101 Sensor Protection IC Page 1 Rev 1.0 22/Feb/01

MLX12101

Sensor Protection IC

MLX12101 Electrical Specifications

DC Operating Parameters TA = -40oC to 135oC, VDD = 5V (unless otherwise specified)

Parameter Symbol Test Condition Min Typ Max Unit
Recommended Operating Conditions

Input Voltage 4.5 5.0 5.5 V
Output Current 8 mA

Output Signal Specifications

Switch-Off Time (Vou <5V)

Reverse Current
Reverse Output Voltage Vss-1 V

Voltage drop-out, Vout-Vin

General Specifiactions

No Load

Overall Supply Current
Swoitching Voltage Vt 5.5 6.8 V

Vin jump from 5V to
12V
Through Vout with
Vdd and Vss
connected

Vin = 4.5V
Iout = 8mA

Vin = 5V
Rload Pin = 22R

150 1000

5 mA

55 mV

500
190 mA

µs

µA

MLX12101 Absolute Maximum Ratings

Parameter Value Unit Comment

Max Operating Voltage Range -14 to 16 V
Max Output Current 100 mA
Supply Current 0.5 mA
Operating temperature -40 to 150 °C
Max junction temperature 150 °C

MLX12101 Sensor Protection IC Page 2 Rev 1.0 22/Feb/01