TPS3808G33DBVTG4

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low-power voltage monitor and reset function - Precision voltage reference - Programmable delay time - Wide supply voltage range - Small package size

Package: SOT-23-6

Essence: The TPS3808G33DBVTG4 is a voltage supervisor IC that provides monitoring and reset functions for microcontrollers, DSPs, and other digital systems. It ensures proper system operation by monitoring the power supply voltage and asserting a reset signal when the voltage falls below a specified threshold.

Packaging/Quantity: The TPS3808G33DBVTG4 is available in tape and reel packaging with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.5V to 10V
• Threshold Voltage Options: 2.93V, 3.08V, 3.63V, 4.38V, 4.63V, 4.88V, 5.13V, 5.38V
• Reset Time Delay: Programmable from 20ms to 1120ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 1.5µA (typical)

Pin Configuration

The TPS3808G33DBVTG4 has a total of 6 pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| MR RST |-- Pin 2: Reset Output (RST) --| VIT VDD |-- Pin 3: Supply Voltage (VDD) --| TD TD |-- Pin 4: Time Delay Programming Input (TD) --| VIT VDD |-- Pin 5: Supply Voltage (VDD) --| MR RST |-- Pin 6: Manual Reset Input (MR) |___________| ```

Functional Features

1. Voltage Monitoring: The TPS3808G33DBVTG4 continuously monitors the supply voltage and asserts a reset signal when it falls below the programmed threshold voltage.
2. Reset Output: The device provides an active-low reset output that remains asserted until the supply voltage rises above the threshold voltage and the reset time delay elapses.
3. Programmable Delay: The reset time delay can be programmed using an external resistor and capacitor to meet specific system requirements.
4. Manual Reset Input: The manual reset input allows for an external reset signal to override the internal monitoring circuitry and assert a reset condition.
5. Precision Voltage Reference: The integrated precision voltage reference ensures accurate monitoring of the supply voltage.

Advantages and Disadvantages

Advantages: - Low-power consumption - Wide supply voltage range - Small package size - Programmable delay time for flexibility - Accurate voltage monitoring with precision reference

Disadvantages: - Limited threshold voltage options

Working Principles

The TPS3808G33DBVTG4 operates by comparing the supply voltage against a programmable threshold voltage. When the supply voltage drops below the threshold, the reset output is asserted, indicating a low-voltage condition. The reset output remains active until the supply voltage rises above the threshold and the programmed reset time delay elapses. The device also includes a manual reset input that can override the internal monitoring circuitry and force a reset condition.

Application Field Plans

The TPS3808G33DBVTG4 is commonly used in various applications where reliable voltage monitoring and reset functionality are required. Some potential application fields include:

1. Microcontrollers: The IC ensures proper operation of microcontrollers by monitoring the supply voltage and initiating a reset when necessary.
2. Digital Signal Processors (DSPs): DSPs often require precise voltage monitoring to maintain stable operation, making the TPS3808G33DBVTG4 an ideal choice.
3. Embedded Systems: The device finds applications in embedded systems where reliable power supply monitoring is crucial for system integrity.
4. Industrial Control Systems: Industrial control systems benefit from the voltage supervision capabilities of the TPS3808G33DBVTG4 to ensure uninterrupted operation.

Alternative Models

1. TPS3808G01DBVR: Similar voltage supervisor IC with a different package (SOT-23-5) and slightly different specifications.
2. TPS3808G25DBVR: Voltage supervisor IC with a higher threshold voltage range and similar features.
3. TPS3808G33DBVR: Another variant of the TPS3808 series with a different package (SOT-23-5) and similar characteristics