Overview
The LMR14030SDDA is a 40V, 3.5A step-down regulator produced by Texas Instruments. This device is part of the SIMPLE SWITCHER® family and is designed for various applications, including industrial, automotive, and battery-powered systems. It features an integrated high-side MOSFET and operates from a wide input voltage range of 4V to 40V, making it versatile for power conditioning from unregulated sources. The regulator has an ultra-low quiescent current of 40µA in sleep mode and 1µA in shutdown mode, which is beneficial for prolonging battery life in battery-powered systems. The device also includes internal loop compensation, which simplifies the design process and minimizes the need for external components.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Vin (min) (V) | 4 | Vin (max) (V) | 40 |
| Vout (min) (V) | 1 | Vout (max) (V) | 36 |
| Maximum Continuous Drain Current (A) | 3.5 | Iq (typ) (mA) | 0.04 |
| Switching frequency (min) (kHz) | 200 | Switching frequency (max) (kHz) | 2500 |
| Operating temperature range (°C) | -40 to 125 | Package | HSOIC (DDA) - 8 pins |
| High-side MOSFET resistance (mΩ) | 90 | Minimum switch-on time (ns) | 75 |
| Shutdown current (µA) | 1 | Duty cycle (max) (%) | 98 |
Key Features
- Wide input voltage range of 4V to 40V
- 3.5A continuous output current
- Ultra-low 40µA operating quiescent current and 1µA shutdown current
- 90mΩ high-side MOSFET
- Adjustable switching frequency from 200kHz to 2.5MHz
- Frequency synchronization to external clock
- Internal compensation for ease of use
- High duty cycle operation supported
- Precision enable input
- External soft start
- Thermal, overvoltage, and short protection
- 8-pin HSOIC with PowerPAD™ package
Applications
- Automotive battery regulation
- Industrial power supplies
- Telecom and datacom systems
- Battery-powered systems
- Industrial automation
- LED lighting
- Portable electronics
- Power modules for consumer electronics
Q & A
- Q: What is the input voltage range of the LMR14030SDDA?
A: The input voltage range is from 4V to 40V. - Q: What is the maximum continuous output current of the LMR14030SDDA?
A: The maximum continuous output current is 3.5A. - Q: What is the quiescent current of the LMR14030SDDA in sleep mode?
A: The quiescent current in sleep mode is 40µA. - Q: Can the switching frequency of the LMR14030SDDA be adjusted?
A: Yes, the switching frequency can be adjusted from 200kHz to 2.5MHz. - Q: What protection features does the LMR14030SDDA have?
A: The device includes thermal, overvoltage, and short protection, as well as cycle-by-cycle current limiting. - Q: What is the package type of the LMR14030SDDA?
A: The package type is HSOIC (DDA) with 8 pins. - Q: How does the LMR14030SDDA handle light load conditions?
A: The device operates in sleep mode at light load conditions to improve efficiency by reducing switching and gate drive losses. - Q: Can the LMR14030SDDA be synchronized to an external clock?
A: Yes, the device can be synchronized to an external clock within the 250kHz to 2.3MHz frequency range. - Q: What is the typical shutdown current of the LMR14030SDDA?
A: The typical shutdown current is 1µA. - Q: How does the LMR14030SDDA protect against thermal issues?
A: The device includes an internal thermal shutdown that stops the high-side MOSFET when the junction temperature exceeds 170°C.
