Overview
The LMR14050SSQDDARQ1 is a SIMPLE SWITCHER® power converter regulator from Texas Instruments, designed for a wide range of applications including industrial and automotive. This step-down DC-DC converter operates from a supply voltage of 4.0 V to 40 V and can deliver up to 5 A of DC load current. It integrates a 90 mΩ (typical) high-side MOSFET, ensuring high efficiency and thermal performance in a compact design. The device is AEC-Q100 qualified, making it suitable for automotive applications with a device temperature grade of -40°C to 125°C.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.0 V to 40 V |
| Output Current | Up to 5 A |
| High-Side MOSFET Resistance | 90 mΩ (typical) |
| Quiescent Current (No Load) | 40 μA |
| Shutdown Current | 1 μA |
| Switching Frequency Range | 200 kHz to 2.5 MHz |
| Synchronization Frequency Range | 250 kHz to 2.3 MHz |
| Package Options | 8-pin HSOIC, 10-pin WSON with exposed pad |
| Package Size | HSOIC: 4.9mm × 6mm, WSON: 4mm × 4mm |
| Temperature Range | -40°C to 125°C |
Key Features
- Integrated high-side MOSFET for high efficiency and thermal performance.
- Constant frequency peak current mode control with sleep mode for high efficiency at light loads.
- Internally compensated, reducing design time and the number of external components.
- Programmable switching frequency and synchronization to an external clock.
- Precision enable input for simplified regulator control and system power sequencing.
- Built-in protection features including cycle-by-cycle current limit, thermal sensing, shutdown due to excessive power dissipation, and output overvoltage protection.
- Ultra-low quiescent current in sleep mode (40 μA) and shutdown mode (1 μA) to prolong battery life.
Applications
The LMR14050SSQDDARQ1 is suitable for various applications, including:
- Automotive systems: Qualified for automotive applications with AEC-Q100 certification.
- Industrial power conditioning: From unregulated sources, the device can handle a wide input voltage range.
- Battery-powered systems: Low quiescent and shutdown currents help prolong battery life.
- General DC-DC conversion: For applications requiring efficient step-down conversion in a compact form factor.
Q & A
- What is the input voltage range of the LMR14050SSQDDARQ1?
The input voltage range is from 4.0 V to 40 V. - What is the maximum output current of the LMR14050SSQDDARQ1?
The device can deliver up to 5 A of DC load current. - What is the typical high-side MOSFET resistance?
The typical high-side MOSFET resistance is 90 mΩ. - What are the package options for the LMR14050SSQDDARQ1?
The device is available in 8-pin HSOIC and 10-pin WSON packages with exposed pads. - 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. - Can the switching frequency be programmed?
Yes, the switching frequency can be programmed from 200 kHz to 2.5 MHz using an external resistor. - Does the device have built-in protection features?
Yes, it includes cycle-by-cycle current limit, thermal sensing, shutdown due to excessive power dissipation, and output overvoltage protection. - What is the temperature range for the LMR14050SSQDDARQ1?
The device operates within a temperature range of -40°C to 125°C. - Is the LMR14050SSQDDARQ1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive applications. - Can the device be synchronized to an external clock?
Yes, it can be synchronized to an external clock within the 250 kHz to 2.3 MHz frequency range.
