Overview
The TPS3828-33DBVRG4 is a voltage monitor with a watchdog timer produced by Texas Instruments. This component is part of the TPS382x family, designed to provide circuit initialization and timing supervision, particularly for DSP and processor-based systems. It ensures proper system reset and monitoring of supply voltages, making it a crucial component in various electronic systems.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Supply Voltage Supervision Range | Voltage levels monitored by the device | 2.5 V, 3 V, 3.3 V, 5 V |
| Power-on Reset Delay Time | Fixed delay time after power-on | 200 ms (TPS3823, TPS3824, TPS3825, and TPS3828) |
| Watchdog Timer Timeout | Timeout period for the watchdog timer | 1.6 s (TPS3823, TPS3824, and TPS3828) |
| Manual Reset Input | Input to force a manual reset | Pull low to force a reset |
| Reset Output | Type of reset output available | Active-low, active-high, and open-drain (TPS3828) |
| Supply Current | Typical supply current of the device | 15 μA |
| Package Type | Physical package of the component | 5-pin SOT-23 |
| Temperature Range | Operating temperature range of the device | −40°C to 85°C (−40°C to 125°C for TPS3823A-33) |
Key Features
- Power-on Reset Generator: Provides a fixed delay time of 200 ms (TPS3823, TPS3824, TPS3825, and TPS3828) or 25 ms (TPS3820) to ensure proper system initialization.
- Manual Reset Input: Allows an external logic signal to force a manual reset, keeping the RESET output low as long as the MR input is low and for the time-out period after it goes high.
- Watchdog Timer: Monitors the system and triggers a reset if the watchdog timer input (WDI) remains high or low longer than the specified time-out period.
- Supply Voltage Supervision: Monitors supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V, keeping the RESET output active low as long as the supply voltage remains below the threshold voltage.
- Low Supply Current: Operates with a typical supply current of 15 μA, making it energy-efficient.
- Compact Package: Available in a 5-pin SOT-23 package, suitable for space-constrained designs.
- Broad Temperature Range: Characterized for operation over a temperature range of −40°C to 85°C (−40°C to 125°C for TPS3823A-33), ensuring reliability in various environments.
Applications
- DSPs, Microcontrollers, and Microprocessors: Ideal for monitoring and supervising the power supply in digital signal processors, microcontrollers, and microprocessors.
- Industrial Equipment: Used in industrial control systems and automation to ensure reliable operation.
- Programmable Controls: Suitable for programmable logic controllers (PLCs) and other programmable control systems.
- Automotive Systems: AEC-Q100 qualified, making it suitable for automotive applications where reliability and robustness are critical.
Q & A
- What is the primary function of the TPS3828-33DBVRG4?
The primary function is to monitor the supply voltage and provide a reset signal if the voltage drops below a specified threshold, ensuring proper system initialization and operation.
- What are the available reset output types for the TPS3828?
The TPS3828 offers active-low, active-high, and open-drain reset output types.
- What is the typical supply current of the TPS3828?
The typical supply current is 15 μA.
- What is the operating temperature range of the TPS3828?
The operating temperature range is −40°C to 85°C (−40°C to 125°C for TPS3823A-33).
- What is the purpose of the watchdog timer in the TPS3828?
The watchdog timer monitors the system and triggers a reset if the watchdog timer input remains high or low longer than the specified time-out period.
- What package type is the TPS3828 available in?
The TPS3828 is available in a 5-pin SOT-23 package.
- Is the TPS3828 suitable for automotive applications?
Yes, it is AEC-Q100 qualified, making it suitable for automotive applications.
- What are the supply voltage supervision ranges for the TPS3828?
The device monitors supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V.
- How does the manual reset input work on the TPS3828?
The manual reset input allows an external logic signal to force a reset, keeping the RESET output low as long as the MR input is low and for the time-out period after it goes high.
- Does the TPS3828 require external components for voltage supervision?
No, the TPS3828 has a fixed-sense threshold voltage set by an internal voltage divider, so no external components are required.
