Overview
The TPS2042BDR is a power-distribution switch manufactured by Texas Instruments. It is part of the TPS20xxB family, designed for applications where heavy capacitive loads and short circuits are likely to occur. These devices incorporate 70mΩ N-channel MOSFET power switches, making them suitable for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input, and the device includes an internal charge pump to manage power-switch rise and fall times, minimizing current surges during switching.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Static Drain-Source On-State Resistance (5-V operation, TJ = 25°C) | 80 - 95 | mΩ |
| Static Drain-Source On-State Resistance (3.3-V operation, TJ = 25°C) | 85 - 105 | mΩ |
| Continuous Current | 500 | mA |
| Operating Range | 2.7 - 5.5 | V |
| Rise Time (Typical) | 0.6 | ms |
| Current Limit (Minimum - Maximum) | 0.75 - 1.25 | A |
| Thermal Protection | Automatic shutdown and recovery | |
| Undervoltage Lockout | Yes | |
| Maximum Standby Supply Current (Single, Dual) | 1 | µA |
| Ambient Temperature Range | -40 to 85 | °C |
| UL Recognition | File Number E169910 |
Key Features
- 70mΩ High-Side MOSFET
- 500mA Continuous Current
- Thermal and Short-Circuit Protection
- Accurate Current Limit (0.75A Minimum, 1.25A Maximum)
- Operating Range: 2.7V to 5.5V
- 0.6ms Typical Rise Time
- Undervoltage Lockout
- Deglitched Fault Report (OC)
- No OC Glitch During Power Up
- Maximum Standby Supply Current: 1µA (Single, Dual) or 2µA (Triple, Quad)
- Ambient Temperature Range: –40°C to 85°C
- UL Recognized, File Number E169910
Applications
The TPS2042BDR is designed for applications where heavy capacitive loads and short circuits are likely to be encountered. These include:
- Power-distribution systems requiring multiple power switches in a single package.
- Systems with heavy capacitive loads.
- Applications needing short-circuit protection.
Q & A
- What is the typical rise time of the TPS2042BDR?
The typical rise time of the TPS2042BDR is 0.6ms.
- What is the continuous current rating of the TPS2042BDR?
The continuous current rating of the TPS2042BDR is 500mA.
- What is the operating voltage range of the TPS2042BDR?
The operating voltage range of the TPS2042BDR is from 2.7V to 5.5V.
- Does the TPS2042BDR have thermal protection?
Yes, the TPS2042BDR has thermal protection that automatically shuts off the switch to prevent damage and recovers once the device has cooled sufficiently.
- What is the maximum standby supply current for the TPS2042BDR?
The maximum standby supply current for the TPS2042BDR is 1µA for single and dual configurations, and 2µA for triple and quad configurations.
- Is the TPS2042BDR UL recognized?
Yes, the TPS2042BDR is UL recognized with File Number E169910.
- What type of MOSFET does the TPS2042BDR use?
The TPS2042BDR uses a 70mΩ N-channel MOSFET.
- Does the TPS2042BDR have undervoltage lockout?
Yes, the TPS2042BDR has undervoltage lockout.
- How does the TPS2042BDR handle overcurrent conditions?
The TPS2042BDR limits the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold or a short is present. It also asserts an overcurrent (OC) logic output low in such conditions.
- What is the ambient temperature range for the TPS2042BDR?
The ambient temperature range for the TPS2042BDR is –40°C to 85°C.
