ST2042

ST2042 CURRENT LIMITED POWER DISTRIBUTION SWITCHES s s s s s s s s s s 80mΩ HIGH-SIDE MOSFET SWITCH 500mA CONTINUOUS CURRENT PER CHANNEL INDEPENDENT THERMAL AND SHORT-CIRCUIT PROTECTION WITH OVERCURRENT LOGIC OUTPUT OPERATING RANGE FROM 2.7V TO 5.5V CMOS- AND TTL-COMPATIBLE ENABLE INPUTS 2.5ms TYPICAL RISE TIME UNDERVOLTAGE LOCKOUT 10µA MAXIMUM STANDBY SUPPLY CURRENT AMBIENT TEMPERATURE RANGE, 0°C TO 85°C ESD PROTECTION SOP DESCRIPTION The ST2042 power distribution switches is intended for application where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporate 80mΩ N-channel MOSFET high-side power switches for power-distribution systems that require multiple powers switches in a single package. Each switch is controlled by an independent logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during ORDERING CODES Type ST2042BD ST2042BDR Temperature Range -40 to 85 °C -40 to 85 °C Package switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V. When the output load exceeds the current-limit threshold or a short is present, these devices limit the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing...