Industrial-Protected Quad-Channel Low-Side Switch

The MAX14919/MAX14919A industrial-protected quad-channel lowside switch features 140mΩ (typ) on-resistance (RON) per channel with integrated ±1kV/42Ω surge protection for robust operation.

Resistor-settable accurate current limiting provides guaranteed operating currents in the range of 100mA to 800mA. Loads that draw large activation or inrush currents are supported using the 2x inrush load-current option. The outputs can be connected in parallel to achieve higher load currents. The four switches are pin-controlled to allow for simple and fast switching of up to 500kHz.

The MAX14919/MAX14919A features reverse current detection. The MAX14919 implements reverse-current protection by driving an external FET for non-capacitive loads. The MAX14919A has reverse current indication.

Inductive loads are turned off rapidly using the internal high-voltage clamps. The switches are short-circuit and overload protected.

The MAX14919/MAX14919A quad low-side switch is available in a 6.5mm x 6.4mm footprint, 20-TSSOP package and a 4mm x 5mm footprint 20-TQFN package specified over the -40°C to +125°C operating temperature range.

Applications

* Industrial Digital Outputs * Relay and Solenoid Drivers * PLC and DCS Systems * Motor Control

* 5V or 7V to 60V Supply Voltage

* 800mA Load Current per OUT

* Integrated 5V/30mA Linear Regulator

* Logic Supply Input from 1.62V(min) to 5.5V(max)

* 5V to 48V Load Voltage Range

* Up to 500kHz Switching Rates

* 2x Inrush Load Current Option for 10ms

* Reduces Power and Heat Dissipation

* 140mΩ (typ) On-Resistance per channel

* 1.7mA (typ) Supply Current

* Settable Load Current Limit

* Robust Design Features

* Internal inductive Energy Clamp at 55V(typ)

* Short-Circuit Protection

* Reverse Current Detection against Load-Supply Miswiring

* ±1kV/42Ω, 8μs/20µs Surge Protection

* ±8kV Contact and ±25kV Airgap ESD Protection

* -40°C to +125°C Operating Ambient Temperature

* Active-Low FAULT Indication for:

* Thermal Overload

* Reverse Load Current Detection

* Undervoltage Lockout on V5 Supply

* Compact 20-pin, 6.5mm x 6.4mm TSSOP Package

* Compact 20-pin, 4mm x 5mm TQFN Package