Overview
The TPS2051BDBVTG4 power-distribution switch, produced by Texas Instruments, is designed for applications that are likely to encounter heavy capacitive loads and short circuits. This device incorporates 70mΩ N-channel MOSFET power switches, making it suitable for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input, and an internal charge pump provides gate drive to minimize current surges during switching. The device operates from supplies as low as 2.7V and includes various protection features such as thermal and short-circuit protection, and accurate current limiting.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| High-Side MOSFET Resistance | 70 | mΩ |
| Continuous Current | 500 | mA |
| Operating Voltage Range | 2.7 to 5.5 | V |
| Current Limit | 0.75 to 1.25 | A |
| Rise Time | 0.6 | ms |
| Ambient Temperature Range | –40 to 85 | °C |
| Maximum Standby Supply Current | 1 (Single, Dual) or 2 (Triple, Quad) | μA |
| Package Type | SOT-23 (DBV) | |
| Pins | 5 | |
| 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 TPS2051BDBVTG4 is suitable for various applications where heavy capacitive loads and short circuits are likely to occur. These include:
- Power-distribution systems requiring multiple power switches in a single package
- USB power management
- Hot-swap applications
- Systems with high inrush currents
- General-purpose power switching in industrial, automotive, and consumer electronics
Q & A
- What is the TPS2051BDBVTG4 power-distribution switch designed for?
The TPS2051BDBVTG4 is designed for applications that are likely to experience heavy capacitive loads and short circuits.
- What type of MOSFET does the TPS2051BDBVTG4 use?
The device uses 70mΩ N-channel MOSFET power switches.
- How is each switch controlled in the TPS2051BDBVTG4?
Each switch is controlled by a logic enable input.
- What does the internal charge pump provide in the TPS2051BDBVTG4?
The internal charge pump provides gate drive to control the power-switch rise and fall times.
- What is the operating voltage range of the TPS2051BDBVTG4?
The device operates from 2.7V to 5.5V.
- What protection features does the TPS2051BDBVTG4 include?
The device includes thermal and short-circuit protection, and accurate current limiting.
- How does the TPS2051BDBVTG4 handle overcurrent conditions?
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 and pulling the overcurrent (OCx) logic output low.
- What happens when the junction temperature rises due to large overloads and short circuits?
A thermal protection circuit shuts off the switch to prevent damage, and the device recovers automatically once it has cooled sufficiently.
- What is the current limit set at for the TPS2051BDBVTG4?
The current limit is set at 1A (typical).
- What is the maximum standby supply current for the TPS2051BDBVTG4?
The maximum standby supply current is 1µA (Single, Dual) or 2µA (Triple, Quad).
