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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
MLX12101
Sensor Protection IC
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
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
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
MLX12101
Sensor Protection IC
Figure 2
Figure 3
MLX12101 Sensor Protection IC Page 3 Rev 1.0 22/Feb/01
MLX12101
Sensor Protection IC
Figure 4
Typical Circuit Diagram
The 12101 is designed for EMC protection in automotive applications.
Figure 5
MLX12101 Sensor Protection IC Page 4 Rev 1.0 22/Feb/01
MLX12101 Overshoot Switch-off Timing
Input 5~12V
Output 0~12V
50µS/div.
MLX12101
Sensor Protection IC
5V/div.
MLX12101 Pinout - SA (SOT-89A) Package
Pin number Description
1 5V output
2 Ground
3 5V input
SOT-89A - Rear View
MLX12101 Sensor Protection IC Page 5 Rev 1.0 22/Feb/01
Melexis Worldwide Locations
For the latest version of this document,
Go to our website at:
www.melexis.com
For additional information
contact Melexis Direct:
USA
Melexis Inc.
41 Locke Road, Concord, NH 03301
Phone: +1 603 223 2362 Fax: +1 603 223 9614
E-mail: sales_usa@melexis.com
France
Melexis France
Tour Arago, 5 rue Bellini, 92806 Puteaux-La-Défense, France.
Phone: +33 1 47 78 11 34 Fax: +33 1 47 78 06 35
E-mail: sales_france@melexis.com
Germany
Melexis GmbH
Schiess-strasse 55, 40549 Düsseldorf, Germany
Phone: +49 211 5360212 Fax: +49 211 5360250
E-mail: sales_de@melexis.com
MLX12101
Sensor Protection IC
Or contact one of our qualified representatives :
United Kingdom
Silicon Concepts
PCB Lynchborough Road, Hampshire GU30 7SB, United Kingdom
Phone: +44 1428 751 617 Fax: +44 1428 751 603
E-mail: sales_uk@melexis.com
Italy
Dimacred IRL
Via Papa Giovanni XXIII no. 25, 20046 Biassono, Italy
Phone: +39 039 249 4856 Fax: +39 039 491773
E-mail: sales_italy@melexis.com
Japan
Star Electronics Co. Ltd.
1-14-10 Shiba Minato-Ku, Tokyo, Japan
Phone + 81 3 3452 7171 Fax + 81 3 3769 2197
E-mail: sales_japan@melexis.com
Taiwan
Beechwood Int’l Taiwan Co.
Room 8, 17F, No. 189, Taipei, Taiwan
Phone: +886 2 2739 3322 Fax: +886 2 2739 3090
E-mail: sales_taiwan@melexis.com
Korea
NeoS Korea
Rm205 chungho plaza, 668-9, deungchon-dong, kangse-ku, seoul 157-030
Korea
Phone + 82-2-3665-6527 Fax + 82-3665-6529
E-mail: sales_korea@melexis.com
Disclaimer
Melexis reserves the right to periodical l y make modificati ons to product specifications. The informati on i ncluded herein is
believed to be accurate and reliable. However, Melexis assumes no responsibilit y f or it s use; nor for any infringements of
patents or other rights of third parties which may result f rom it’s use.
MLX12101 Sensor Protection IC Page 6 Rev 1.0 22/Feb/01
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