TPS2021是TI公司的一款固定限流开关产品，TPS2021是0.66A 2.7-5.5V 单路配电开关 IC 高侧 MOSFET、故障报告、工作态低电平启用，本页介绍了TPS2021的产品说明、应用、特性等，并给出了与TPS2021相关的TI元器件型号供参考。
TPS2021 - 0.66A 2.7-5.5V 单路配电开关 IC 高侧 MOSFET、故障报告、工作态低电平启用 - 固定限流开关 - USB电源和充电端口控制器 - TI公司（Texas Instruments，德州仪器）
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
