1ch Low Side Switch IC
In-Vehicle 1ch Low Side Switch
BD1LB500 Series (BD1LB500EFJ-C BD1LB500FVM-C)
■ Built-in overcurrent limiting circuit
■ Built-in thermal shutdown circuit (TSD)
■ Built-in open load detection circuit (at output OFF)
■ Enables direct control from CMOS logic ICs, etc.
■ Low standby current
■ Built-in under voltage lock out circuit
■ Built-in diagnostic output (ST) terminal
■ Low ON resistance RDS(ON)=350mΩ(Typ) (VDD=IN=5V,
■ Built-in overvoltage protection(active clamp) for output
■ Monolithic power IC in which the control unit (CMOS)
and power MOS FET are incorporated into one chip
■ 1ch low side switch for driving mechanical relay coil
■ AEC-Q100 Qualified(1)
BD1LB500 Series is an in-vehicle 1ch low side switch.
This switch builds in the overcurrent limiting circuit,
thermal shutdown circuit, open load detection circuit and
under voltage lock out circuit. It also provides the
diagnostic output circuit when an abnormality is
■ In-vehicle application (Air conditioners, body devices,
Basic Application Circuit (Recommendation)
Operating voltage range
ON resistance (25°C, Typ.)
Overcurrent limitation (Typ.)
Active clamp energy (25°C)
3.5V to 5.5V
4.90mm x 6.00mm x 1.00mm
2.90mm x 4.00mm x 0.90mm
(2) When the open detection function is required, an external resistance must be added between DRAIN terminal and SOURCE terminal.
(3) It is necessary to detect unusual state(ST terminal is low) when VDD terminal is opened.
Product configuration: Silicon monolithic integrated circuit
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○The product is not designed for radiation resistance.