The TPS202x family of power distribution switches is intended for applications where heavy capacitive loads and short circuits are likely to be encountered. These devices are 50-m N-channel MOSFET high-side power switches. The switch is controlled by a logic enable compatible with 5-V logic and 3-V logic. 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 2.7 V.
●When the output load exceeds the current-limit threshold or a short is present, the TPS202x 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.
●The TPS202x devices differ only in short-circuit current threshold. The TPS2020 limits at 0.3-A load, the TPS2021 at 0.9-A load, the TPS2022 at 1.5-A load, the TPS2023 at 2.2-A load, and the TPS2024 at 3-A load (see ). The TPS202x is available in an 8-pin small-outline integrated-circuit (SOIC) package and in an 8-pin dual in-line package (DIP) and operates over a junction temperature range of -40°C to 125°C.
● 33-m (5-V Input) High-Side MOSFET Switch
● Short-Circuit and Thermal Protection
● Overcurrent Logic Output
● Operating Range . . . 2.7 V to 5.5 V
● Logic-Level Enable Input
● TypicalRise Time . . . 6.1 ms
● Undervoltage Lockout
● Maximum Standby Supply Current . . . 10 µA
● No Drain-Source Back-Gate Diode
● Available in 8-Pin SOIC and PDIP Packages
● Ambient Temperature Range, -40°C to 85°C
● 2-kV Human-Body-Model, 200-V Machine-Model ESD Protection
● UL Listed - File No. E169910
