Overview
The TPS3306-18DR is a dual-processor supervisory circuit designed by Texas Instruments, primarily for use in DSP and processor-based systems that require monitoring of two independent supply voltages. This component is part of the TPS3306 family, which is tailored for circuit initialization and power management in various electronic systems. The TPS3306-18DR specifically monitors 3.3V and 1.8V supply voltages, making it suitable for a wide range of applications including portable battery-powered equipment, embedded control systems, and automotive systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.7 V to 6 V | V |
| Monitored Voltages | 3.3 V / 1.8 V | V |
| Threshold Voltages | SENSE1: 2.93 V, SENSE2: 1.68 V | V |
| Power-On Reset Delay | 100 ms | ms |
| Watchdog Timer Time-Out | 0.8 s | s |
| Supply Current | 15 µA (Typ.) | µA |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | SOIC-8 | |
| Low-Level Output Voltage (RESET, PFO) | 0.4 V (VDD = 3.3 V, IOL = 2 mA) | V |
Key Features
- Dual supervisory circuits with power-fail detection for monitoring two independent supply voltages.
- Integrated watchdog timer with a 0.8 second time-out interval.
- Power-on reset generator with a 100 ms delay time.
- Open-drain reset and power-fail output.
- Low supply current of 15 µA (typical).
- Voltage monitoring for power-fail or low-battery warning.
- Available in MSOP-8 and SO-8 packages.
- Operating temperature range from –40°C to +85°C.
Applications
- Multivoltage DSPs and processors.
- Portable battery-powered equipment.
- Embedded control systems.
- Automotive systems.
- Intelligent instruments.
- Voltage monitoring for power-fail or low-battery warning.
Q & A
- What is the primary function of the TPS3306-18DR? The primary function is to supervise and manage two independent supply voltages in DSP and processor-based systems.
- What are the monitored voltages for the TPS3306-18DR? The TPS3306-18DR monitors 3.3V and 1.8V supply voltages.
- What is the power-on reset delay time? The power-on reset delay time is 100 ms.
- How does the watchdog timer function? The watchdog timer is triggered by a positive or negative transition of the WDI input and has a time-out interval of 0.8 seconds.
- What is the typical supply current of the TPS3306-18DR? The typical supply current is 15 µA.
- In what temperature range does the TPS3306-18DR operate? The operating temperature range is from –40°C to +85°C.
- What types of packages are available for the TPS3306-18DR? The component is available in MSOP-8 and SO-8 packages.
- Can the TPS3306-18DR be used for low-battery detection? Yes, it can be used for low-battery detection through the integrated power-fail comparator.
- What is the low-level output voltage for the RESET and PFO pins? The low-level output voltage is 0.4 V (VDD = 3.3 V, IOL = 2 mA).
- Is the TPS3306-18DR suitable for automotive applications? Yes, it is qualified for automotive applications.
