LM5050Q1MK-1/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM5050Q1MK-1/NOPB is a high-side load switch designed for automotive applications. It provides protection and control of inductive loads, such as motors, solenoids, and relays.

Characteristics: - High-side load switch - Automotive-grade - Protection and control of inductive loads - Low quiescent current - Wide input voltage range - Overcurrent and thermal shutdown protection

Package: The LM5050Q1MK-1/NOPB is available in a small 8-pin VSSOP package, which allows for space-saving integration into automotive electronic systems.

Essence: The essence of the LM5050Q1MK-1/NOPB is its ability to provide reliable and efficient protection and control of inductive loads in automotive applications.

Packaging/Quantity: The LM5050Q1MK-1/NOPB is typically sold in reels of 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 42V
• Output Voltage Range: 0V to 42V
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Overcurrent Threshold: Adjustable
• Thermal Shutdown: Yes

Pin Configuration

The LM5050Q1MK-1/NOPB has the following pin configuration:

```

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| | --| EN | --| IN | --| OUT | --| GND | --| PG | --| OCSET | --| VCC | |___________| ```

Functional Features

1. Enable (EN) Pin: This pin is used to enable or disable the load switch. When EN is high, the load switch is enabled and the output is connected to the input. When EN is low, the load switch is disabled and the output is disconnected.

2. Input (IN) Pin: The input pin is connected to the power supply voltage. It accepts a wide range of input voltages, from 4.5V to 42V.

3. Output (OUT) Pin: The output pin is connected to the load. It provides a controlled connection between the input and the load.

4. Ground (GND) Pin: The ground pin is connected to the system ground.

5. Power Good (PG) Pin: This pin provides an indication of the load switch status. When the load switch is enabled and the output voltage is within the specified range, PG is high. Otherwise, it is low.

6. Overcurrent Set (OCSET) Pin: This pin is used to set the overcurrent threshold. By connecting a resistor between OCSET and GND, the overcurrent threshold can be adjusted.

7. Voltage Supply (VCC) Pin: This pin is connected to the supply voltage for internal circuitry.

Advantages

• Automotive-grade reliability
• Wide input voltage range allows for versatile applications
• Low quiescent current minimizes power consumption
• Overcurrent and thermal shutdown protection ensures safe operation
• Small package size enables space-saving integration

Disadvantages

• Limited maximum output voltage of 42V may not be suitable for certain applications requiring higher voltages
• Requires external resistor for setting the overcurrent threshold

Working Principles

The LM5050Q1MK-1/NOPB operates as a high-side load switch by controlling the connection between the input and the load. When the enable (EN) pin is high, the load switch is turned on, allowing current to flow from the input to the load. Conversely, when EN is low, the load switch is turned off, disconnecting the output from the input.

The device incorporates overcurrent and thermal shutdown protection mechanisms to ensure safe operation. The overcurrent threshold can be adjusted by connecting a resistor between the OCSET pin and ground. If the current exceeds the set threshold, the load switch will shut off to protect the circuit. Additionally, the device features thermal shutdown protection, which disables the load switch if the temperature exceeds the specified limit.

Application Field Plans

The LM5050Q1MK-1/NOPB is specifically designed for automotive applications where protection and control of inductive loads are required. Some potential application fields include:

1. Automotive lighting systems
2. Power windows and mirrors
3. HVAC systems
4. Electric power steering
5. Engine control units (ECUs)
6. Battery management systems

Alternative Models

1. TPS1H100-Q1: This high-side load switch offers similar functionality and automotive-grade reliability.
2. BTS50085-1TMB: