Overview
The LMR14030SSQDDARQ1 is a high-efficiency, synchronous step-down DC-DC converter designed by Texas Instruments. It is part of the automotive-grade LMRx14030-Q1 family of devices, specifically built for automotive applications requiring high reliability and performance. This regulator operates from a wide input voltage range of 4V to 40V and can deliver up to 3.5A of continuous output current. The device integrates a 90mΩ high-side MOSFET and features an ultra-low quiescent current of 40µA, making it suitable for battery-powered systems.
The LMR14030SSQDDARQ1 is designed for ease of use, with internal compensation that minimizes the need for external components. It also includes various protection features such as cycle-by-cycle current limiting, thermal sensing, and output overvoltage protection. The device supports high duty cycle operation and has an adjustable switching frequency from 200kHz to 2.5MHz, which can be synchronized to an external clock.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Vin (min) | 4 | V |
| Vin (max) | 40 | V |
| Vout (min) | 1 | V |
| Vout (max) | 30 | V |
| Iout (max) | 3.5 | A |
| Iq (typ) | 0.04 | mA |
| Switching frequency (min) | 200 | kHz |
| Switching frequency (max) | 2500 | kHz |
| Operating temperature range | -40 to 125 | °C |
| Package | HSOIC-8 | |
| Control mode | Current mode | |
| Duty cycle (max) | 98 | % |
Key Features
- High Efficiency: Provides efficient power conversion with typical efficiency levels above 90% under optimal operating conditions.
- Wide Input Voltage Range: Operates from 4V to 40V, making it suitable for various input voltage scenarios.
- Adjustable Output Voltage: Allows for flexibility in output voltage settings.
- Integrated FETs: Integrated power FETs reduce the need for external components.
- Compact Design: Small form factor suitable for space-constrained applications.
- Adjustable Switching Frequency: Programmable from 200kHz to 2.5MHz, and can be synchronized to an external clock.
- Internal Compensation: Reduces design time and the need for external components.
- High Duty Cycle Operation: Supported for various load conditions.
- Precision Enable Input: Simplifies regulator control and system power sequencing.
- Protection Features: Includes cycle-by-cycle current limiting, thermal sensing, and output overvoltage protection.
- Low Quiescent Current: 40µA in sleep mode and 1µA in shutdown mode to prolong battery life.
Applications
- Automotive Electronics: Ideal for powering automotive systems and modules due to its automotive-grade rating and high reliability.
- Industrial Controls: Used in industrial control systems for efficient power management.
- Telecom and Datacom Systems: Suitable for telecom and datacom applications requiring stable and efficient power supply.
- Battery Powered Systems: Suitable for battery-powered applications where voltage regulation is critical for system operation.
- LED Lighting: Used in LED lighting applications requiring stable power supply.
Q & A
- Q: What is the typical efficiency of the LMR14030SSQDDARQ1?
A: The LMR14030SSQDDARQ1 offers high efficiency levels, typically above 90%, under optimal operating conditions. Refer to the datasheet for detailed efficiency curves and performance data.
- Q: Is the LMR14030SSQDDARQ1 suitable for battery-powered applications?
A: Yes, the LMR14030SSQDDARQ1's wide input voltage range and adjustable output make it suitable for battery-powered applications where voltage regulation is critical for system operation.
- Q: What is the maximum output current of the LMR14030SSQDDARQ1?
A: The LMR14030SSQDDARQ1 can deliver up to 3.5A of continuous output current.
- Q: What is the operating temperature range of the LMR14030SSQDDARQ1?
A: The operating temperature range is from -40°C to 125°C.
- Q: How does the LMR14030SSQDDARQ1 protect against overcurrent conditions?
A: The LMR14030SSQDDARQ1 is protected from overcurrent conditions by cycle-by-cycle current limiting on the peak current of the high-side MOSFET.
- Q: Can the switching frequency of the LMR14030SSQDDARQ1 be adjusted?
A: Yes, the switching frequency can be programmed from 200kHz to 2.5MHz and can also be synchronized to an external clock.
- Q: What type of control mode does the LMR14030SSQDDARQ1 use?
A: The LMR14030SSQDDARQ1 uses current mode control.
- Q: What is the quiescent current of the LMR14030SSQDDARQ1 in sleep mode?
A: The quiescent current in sleep mode is typically 40µA.
- Q: Does the LMR14030SSQDDARQ1 have built-in thermal protection?
A: Yes, the device includes thermal sensing and shutdown due to excessive power dissipation.
- Q: What is the package type of the LMR14030SSQDDARQ1?
A: The LMR14030SSQDDARQ1 is housed in an 8-pin HSOIC with PowerPAD package.
