TPS3836E18DBVR

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisor

Characteristics: - Low Power Consumption - Wide Operating Voltage Range - Adjustable Reset Threshold - Manual Reset Input - Power-On Reset Delay Time: 200 ms (typical) - Open Drain Output - Small Package Size

Package: SOT-23-5

Essence: The TPS3836E18DBVR is a voltage supervisor IC designed to monitor the power supply voltage of electronic systems. It ensures proper system operation by generating a reset signal when the voltage falls below a certain threshold.

Packaging/Quantity: The TPS3836E18DBVR is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.8 V to 6.5 V
• Reset Threshold Voltage: Adjustable from 1.2 V to 5 V
• Quiescent Current: 3 µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS3836E18DBVR has a total of five pins:

1. GND: Ground reference for the IC.
2. MR: Manual Reset input pin. Pulling this pin low forces a reset.
3. VDD: Positive supply voltage input.
4. RESET: Open drain output that goes low when the monitored voltage falls below the threshold.
5. NC: No connection pin.

Functional Features

• Voltage Monitoring: The TPS3836E18DBVR continuously monitors the supply voltage and generates a reset signal when it drops below the user-adjustable threshold.
• Adjustable Threshold: The reset threshold voltage can be set using an external resistor divider network, allowing flexibility in system design.
• Manual Reset: The manual reset input (MR) provides a way to force a reset externally, regardless of the monitored voltage level.
• Power-On Reset Delay: The IC includes a power-on reset delay circuit that ensures stable operation during power-up. The delay time is typically 200 ms.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide operating voltage range - Adjustable reset threshold - Small package size - Manual reset capability

Disadvantages: - No built-in hysteresis for the reset threshold

Working Principles

The TPS3836E18DBVR operates by comparing the supply voltage with the user-adjustable threshold voltage. When the supply voltage drops below the threshold, the reset output goes low, indicating a system reset condition. The reset output remains low until the supply voltage rises above the threshold and the power-on reset delay time has elapsed.

Detailed Application Field Plans

The TPS3836E18DBVR is commonly used in various electronic systems where reliable voltage monitoring is crucial. Some application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper operation by monitoring the power supply voltage and generating a reset signal when necessary.
2. Industrial Control Systems: Providing voltage supervision to critical components, preventing malfunctions due to voltage fluctuations.
3. Automotive Electronics: Monitoring the battery voltage to protect sensitive electronics from undervoltage conditions.
4. Power Management Systems: Assisting in power sequencing and fault detection in complex power management circuits.

Detailed and Complete Alternative Models

1. TPS3837E18DBVR: Similar to TPS3836E18DBVR but with a fixed reset threshold voltage of 1.8 V.
2. TPS3838E18DBVR: Similar to TPS3836E18DBVR but with a fixed reset threshold voltage of 2.5 V.
3. TPS3839E18DBVR: Similar to TPS3836E18DBVR but with a fixed reset threshold voltage of 3.3 V.

These alternative models provide options for different system requirements and desired reset threshold voltages.

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