Overview
The TPS2121RUXR is a Dual-Input, Single-Output (DISO) Power Multiplexer (MUX) produced by Texas Instruments. This device is designed to automatically detect, select, and seamlessly transition between two available power inputs, making it ideal for systems with multiple power sources. It supports both ORing and source selection operations, allowing priority to be given to the highest input voltage or manually assigned to a lower voltage input. The TPS2121RUXR features an ideal diode operation that ensures uninterrupted power to the load with minimal hold-up capacitance during switchover.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Input Voltage Range | 2.8 | 22 | V |
| Absolute Maximum Input Voltage | - | 24 | V |
| RON Resistance (Typical) | - | 56 mΩ | mΩ |
| Output Current Limit | 1 A | 4.5 A | A |
| Output Voltage Range | 0 | 22 | V |
| Overvoltage Pin Voltage | 0 | 5.5 | V |
| Control Pin Voltage | 0 | 5.5 | V |
| Status Pin Pull Up Resistance | 6 kΩ | 20 kΩ | kΩ |
| Current Limit Resistance | 18 kΩ | 100 kΩ | kΩ |
| Operating Temperature Range | -40°C | 125°C | °C |
| Package Type | - | 12-VFQFN | - |
Key Features
- Wide operating range: 2.8 V to 22 V
- Absolute maximum input voltage of 24 V
- Low RON resistance: 56 mΩ (typical)
- Adjustable overvoltage supervisor (OVx) with accuracy < ±5%
- Adjustable priority supervisor (PR1) with accuracy < ±5%
- Supports external voltage reference (CP2) with an accuracy of <1%
- Output current limit (ILM): 1 A – 4.5 A
- Channel status indication (ST)
- Adjustable input settling time (SS) and output soft start time (SS)
- Fast output switchover (tSW): 5 µs (typical)
- Low Iq from enabled input: 200 µA (typical) and from disabled input: 10 µA (typical)
- Manual input source selection (OVx)
- Over temperature protection (OTP)
Applications
- Backup and standby power
- Input source selection
- Multiple battery management
- EPOS and barcode scanners
- Building automation and surveillance
- Tracking and telematics
Q & A
- What is the TPS2121RUXR?
The TPS2121RUXR is a Dual-Input, Single-Output (DISO) Power Multiplexer (MUX) designed to automatically detect, select, and seamlessly transition between two available power inputs.
- What is the operating voltage range of the TPS2121RUXR?
The operating voltage range is from 2.8 V to 22 V, with an absolute maximum input voltage of 24 V.
- What is the typical RON resistance of the TPS2121RUXR?
The typical RON resistance is 56 mΩ.
- What is the output current limit of the TPS2121RUXR?
The output current limit is adjustable from 1 A to 4.5 A.
- Does the TPS2121RUXR support external voltage reference?
Yes, it supports an external voltage reference (CP2) with an accuracy of <1%.
- What is the switchover time of the TPS2121RUXR?
The fast output switchover time (tSW) is typically 5 µs.
- What are the quiescent current characteristics of the TPS2121RUXR?
The quiescent current from an enabled input is typically 200 µA, and from a disabled input is typically 10 µA.
- Does the TPS2121RUXR have over temperature protection?
Yes, it includes over temperature protection (OTP).
- What is the package type of the TPS2121RUXR?
The package type is 12-VFQFN.
- What are some common applications of the TPS2121RUXR?
Common applications include backup and standby power, input source selection, multiple battery management, EPOS and barcode scanners, building automation and surveillance, and tracking and telematics.
