Overview
The TPS2042BD is a power-distribution switch integrated circuit produced by Texas Instruments. It is designed for applications where heavy capacitive loads and short circuits are likely to be encountered. This device incorporates 70-mΩ 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 the device includes an internal charge pump to manage power-switch rise and fall times, minimizing current surges during switching.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC-8 |
| Number of Channels | 2 |
| Continuous Current | 500 mA |
| On-Resistance | 70 mΩ |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Rise Time | 0.6 ms (typical) |
| Current Limit | 0.75 A (minimum), 1.25 A (maximum) |
| Standby Supply Current | 1 μA (single, dual), 2 μA (triple, quad) |
| Ambient Temperature Range | -40°C to 85°C |
| UL Recognition | File Number E169910, additional recognition for ganged configuration |
Key Features
- 70-mΩ High-Side MOSFET
- 500-mA Continuous Current
- Thermal and Short-Circuit Protection
- Accurate Current Limit (0.75 A Minimum, 1.25 A Maximum)
- Operating Range: 2.7 V to 5.5 V
- 0.6-ms Typical Rise Time
- Undervoltage Lockout
- Deglitched Fault Report (OC)
- No OC Glitch During Power Up
- Maximum Standby Supply Current: 1-μA (Single, Dual) or 2-μA (Triple, Quad)
- Ambient Temperature Range: -40°C to 85°C
- UL Recognized, File Number E169910, with additional UL Recognition for ganged configuration
Applications
- Heavy Capacitive Loads
- Short-Circuit Protections
Q & A
- What is the primary function of the TPS2042BD?
The TPS2042BD is a power-distribution switch designed to manage power distribution in systems with heavy capacitive loads and potential short circuits.
- What is the on-resistance of the MOSFET in the TPS2042BD?
The on-resistance of the MOSFET is 70 mΩ.
- What is the operating voltage range of the TPS2042BD?
The operating voltage range is from 2.7 V to 5.5 V.
- What kind of protection does the TPS2042BD offer?
The device offers thermal and short-circuit protection.
- How does the TPS2042BD 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 device experiences thermal shutdown?
When continuous heavy overloads and short circuits cause the junction temperature to rise, a thermal protection circuit shuts off the switch. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently.
- What is the typical rise time of the TPS2042BD?
The typical rise time is 0.6 ms.
- Does the TPS2042BD have undervoltage lockout?
Yes, the device includes undervoltage lockout.
- Is the TPS2042BD UL recognized?
Yes, it is UL recognized with File Number E169910 and additional recognition for ganged configuration.
- What is the ambient temperature range for the TPS2042BD?
The ambient temperature range is from -40°C to 85°C.
