Overview
The LMR14050SDDAR, produced by Texas Instruments, is a 40 V, 5 A step-down regulator with an integrated high-side MOSFET. This device is part of the SIMPLE SWITCHER® family and is designed for a wide range of applications, including industrial, automotive, and battery-powered systems. It features a wide input voltage range from 4 V to 40 V, making it versatile for power conditioning from unregulated sources. The regulator is known for its ultra-low quiescent current of 40 µA in sleep mode and 1 µA in shutdown mode, which is beneficial for prolonging battery life in battery-powered systems.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4 V to 40 V |
| Output Current | 5 A Continuous |
| Switching Frequency | Adjustable from 200 kHz to 2.5 MHz |
| Quiescent Current | 40 µA (Sleep Mode), 1 µA (Shutdown Mode) |
| High-Side MOSFET Resistance | 90 mΩ |
| Minimum Switch-On Time | 75 ns |
| Package Type | 8-Pin HSOIC with PowerPAD™ |
| Package Size | 4.89 mm x 3.90 mm |
Key Features
- Current Mode Control with Adjustable Switching Frequency
- Frequency Synchronization to External Clock
- Internal Compensation for Ease of Use
- High Duty Cycle Operation Supported
- Precision Enable Input
- External Soft-start Capability
- Thermal, Overvoltage, and Short-Circuit Protection
- VIN Under-Voltage Lockout (UVLO) and Cycle-by-Cycle Current Limit
Applications
- Automotive Battery Regulation
- Industrial Power Supplies
- Telecom and Datacom Systems
- Battery Powered Systems
Q & A
- What is the input voltage range of the LMR14050SDDAR?
The input voltage range is from 4 V to 40 V. - What is the maximum continuous output current of the LMR14050SDDAR?
The maximum continuous output current is 5 A. - What is the quiescent current in sleep mode and shutdown mode?
The quiescent current is 40 µA in sleep mode and 1 µA in shutdown mode. - What is the resistance of the high-side MOSFET?
The resistance of the high-side MOSFET is 90 mΩ. - Can the switching frequency be adjusted?
Yes, the switching frequency can be adjusted from 200 kHz to 2.5 MHz. - Does the LMR14050SDDAR have built-in protection features?
Yes, it includes thermal, overvoltage, and short-circuit protection, as well as VIN under-voltage lockout (UVLO) and cycle-by-cycle current limit. - What is the package type and size of the LMR14050SDDAR?
The package type is 8-Pin HSOIC with PowerPAD™, and the size is 4.89 mm x 3.90 mm. - What are some common applications of the LMR14050SDDAR?
Common applications include automotive battery regulation, industrial power supplies, telecom and datacom systems, and battery-powered systems. - Does the LMR14050SDDAR support high duty cycle operation?
Yes, it supports high duty cycle operation. - Is external soft-start capability available?
Yes, external soft-start capability is available.
