TPS3850H18DRCR

Product Overview

Category

The TPS3850H18DRCR belongs to the category of voltage supervisors and monitors.

Use

This product is primarily used for monitoring the voltage levels in electronic systems to ensure proper functioning and prevent damage due to overvoltage or undervoltage conditions.

Characteristics

• Voltage monitoring range: 0.4V to 5.5V
• Adjustable threshold voltage
• Low quiescent current consumption
• Wide operating temperature range: -40°C to 125°C
• Small package size: 6-pin SON (2mm x 2mm)

Package and Quantity

The TPS3850H18DRCR is available in a small-outline no-lead (SON) package. It is supplied in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Supply voltage range: 1.8V to 5.5V
• Threshold voltage accuracy: ±1.5%
• Quiescent current: 3µA (typical)
• Power-on reset delay time: 200ms (typical)
• Reset timeout period: 20ms to 1120ms (adjustable)

Pin Configuration

The TPS3850H18DRCR has the following pin configuration:

```

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| | --| VDD | --| GND | --| MR | --| RESET | --| VIT | |___________| ```

• VDD: Power supply input
• GND: Ground reference
• MR: Manual reset input
• RESET: Reset output
• VIT: Voltage input for threshold adjustment

Functional Features

1. Voltage Monitoring: The TPS3850H18DRCR continuously monitors the voltage level and provides a reset signal when it falls below or exceeds the set threshold.
2. Adjustable Threshold: The threshold voltage can be adjusted to suit specific system requirements, allowing flexibility in voltage monitoring.
3. Power-On Reset Delay: The device ensures a stable power supply before releasing the reset signal, preventing premature system operation during power-up.
4. Reset Timeout Period: The reset output remains active for a configurable period after the voltage returns within the acceptable range, providing sufficient time for the system to stabilize.

Advantages and Disadvantages

Advantages

• Wide operating voltage range enables compatibility with various electronic systems.
• Adjustable threshold voltage allows customization for different applications.
• Low quiescent current consumption minimizes power consumption in battery-powered devices.
• Small package size saves board space in compact designs.

Disadvantages

• Limited number of pins may restrict additional functionality integration.
• Lack of built-in hysteresis may lead to potential oscillations near the threshold voltage.

Working Principles

The TPS3850H18DRCR operates by comparing the monitored voltage input (VIT) with the internally set threshold voltage. When the voltage falls below or exceeds the threshold, the reset output is activated. The power-on reset delay ensures that the reset signal is not released immediately upon power-up, allowing the system to stabilize. The reset timeout period determines how long the reset output remains active after the voltage returns within the acceptable range.

Application Field Plans

The TPS3850H18DRCR finds application in various electronic systems where voltage monitoring is critical. Some potential fields of application include:

1. Battery-Powered Devices: Ensuring proper voltage levels in portable devices such as smartphones, tablets, and wearables to prevent damage to sensitive components.
2. Industrial Control Systems: Monitoring voltage levels in control panels, motor drives, and PLCs to maintain reliable operation and prevent equipment failure.
3. Automotive Electronics: Voltage supervision in automotive systems, including engine control units (ECUs), infotainment systems, and safety modules, to ensure safe and efficient operation.
4. Power Supply Units: Monitoring voltage levels in power supply units to protect downstream components from overvoltage or undervoltage conditions.

Alternative Models

1. TPS3850H33DRCR: Similar to TPS3850H18DRCR but with a higher threshold voltage of 3.3V.
2. TPS3850H50DRCR: Similar to TPS3850H18DRCR but with a higher threshold voltage of 5.0V.
3. TPS3850H33QDBVRQ1: Automotive-grade version of TPS3850H33DRCR with enhanced reliability and performance for automotive applications.

These alternative models provide similar functionality but with different threshold voltage options to cater to specific voltage monitoring requirements.

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