The TPS2049 power-distribution switch is intended for applications where heavy capacitive loads and short circuits are likely to be encountered. This device incorporates a 600-m N-channel MOSFET power switch for power-distribution systems that require only one power distribution path. The switch is controlled by a 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 switching. The charge pump requires no external components and allows operation from supplies as low as 2.7V.
●When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OC) logic output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures the switch remains off until valid input voltage is present. This power-distribution switch is designed to set current limit at 150mA typically.
● 100-mA Continuous Current
● 600-m High-SideMOSFET
● Thermal and Short-Circuit Protection
● Operating Range: 2.7 V to 5.5 V
● 0.6-ms Typical Rise Time
● Undervoltage Lockout
● Deglitched Fault Report (OC)
● 43 µA Quiescent Supply Current
● 1-µA Maximum Standby Supply Current
● SOIC-8 Package
● Ambient Temperature Range: -40°C to 85°C
● 2 µS Response Time to Short Circuit
