Overview
The TPS2115APW from Texas Instruments is a highly versatile and robust power multiplexer designed to facilitate seamless transitions between two power supplies. This device is part of the TPS211xA family, which includes extensive protection circuitry and advanced switching capabilities. It is particularly useful in applications where multiple power sources need to be managed efficiently, such as in portable electronics and power backup systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range (IN1, IN2) | 2.8 | 5.5 | V | |
| Drain-Source On-State Resistance (rDS(on)) | 84 | 110 | 140 | mΩ |
| Current Limit Adjustment Range | 0.63 | 1.25 | 2 | A |
| Operating Current | 55 | μA | ||
| Standby Current | 0.5 | μA | ||
| Thermal Shutdown Threshold | 135 | °C | ||
| Package Types | TSSOP-8, SON-8 |
Key Features
- Two-input, one-output power multiplexer with low rDS(on) switches (84 mΩ typical for TPS2115A)
- Wide operating voltage range: 2.8 V to 5.5 V
- Manual and auto-switching operating modes
- CMOS- and TTL-compatible control inputs
- User-programmable current limiting and thermal protection
- Inrush current control and seamless supply transition
- Cross-conduction and reverse-conduction blocking
- Integrated charge pump for FET gate voltage control
- Slow output voltage slew-rate control to limit inrush current
Applications
- Personal Computers (PCs)
- Personal Digital Assistants (PDAs)
- Digital Cameras
- Modems
- Cell Phones
- Digital Radios
- MP3 Players
- Other portable electronic devices requiring dual power supply management
Q & A
- What is the primary function of the TPS2115APW? The TPS2115APW is a power multiplexer that enables seamless transitions between two power supplies.
- What is the operating voltage range of the TPS2115APW? The operating voltage range is from 2.8 V to 5.5 V.
- What are the typical on-state resistances of the TPS2115APW? The typical on-state resistance is 84 mΩ.
- Does the TPS2115APW support both manual and auto-switching modes? Yes, it supports both manual and auto-switching modes.
- What is the purpose of the integrated charge pump in the TPS2115APW? The integrated charge pump provides power to the current limit amplifier and allows the output FET gate voltage to be higher than the input supply voltages.
- How does the TPS2115APW control inrush current? It controls inrush current through slow output voltage slew-rate control when switching from the Hi-Z state to either IN1 or IN2.
- What types of packages are available for the TPS2115APW? It is available in TSSOP-8 and SON-8 packages.
- What is the thermal shutdown threshold of the TPS2115APW? The thermal shutdown threshold is 135°C.
- Can the TPS2115APW be used in applications requiring high current limits? Yes, it can handle current limits up to 2 A, depending on the configuration.
- Is the TPS2115APW compatible with both CMOS and TTL logic? Yes, it is compatible with both CMOS and TTL logic.
