Overview
The LMR14050SDDA from Texas Instruments is a SIMPLE SWITCHER® power converter, specifically designed as a step-down DC-DC regulator. This device operates from a wide input voltage range of 4V to 40V and can deliver up to 5A of continuous output current. It integrates a high-side MOSFET with a typical on-resistance of 90mΩ, ensuring high efficiency and excellent thermal performance. The regulator features ultra-low quiescent current of 40µA in sleep mode and 1µA in shutdown mode, making it ideal for battery-powered systems. The LMR14050SDDA is packaged in an 8-pin HSOIC with PowerPAD™, which aids in heat dissipation and reduces the overall design size.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4 to 40 | V |
| Output Current | Up to 5 | A |
| Quiescent Current (Sleep Mode) | 40 | µA |
| Quiescent Current (Shutdown Mode) | 1 | µA |
| High-Side MOSFET On-Resistance | 90 | mΩ |
| Switching Frequency Range | 200 kHz to 2.5 MHz | |
| Minimum Switch-On Time | 75 ns | |
| Maximum Duty Cycle | 97% | |
| Package Type | 8-pin HSOIC with PowerPAD™ | |
| Package Size | 4.9mm × 6mm |
Key Features
- Wide input voltage range from 4V to 40V
- Ultra-low quiescent current in sleep and shutdown modes
- Adjustable switching frequency from 200 kHz to 2.5 MHz
- Frequency synchronization to an external clock
- Internal compensation for ease of use
- Precision enable input for system power sequencing
- External soft-start capability
- Thermal, overvoltage, and short-circuit protection
- High duty cycle operation supported
- Integrated bootstrap voltage regulator
Applications
- Automotive battery regulation
- Industrial power supplies
- Telecom and datacom systems
- Battery-powered systems
Q & A
- What is the input voltage range of the LMR14050SDDA?
The input voltage range is from 4V to 40V.
- What is the maximum output current of the LMR14050SDDA?
The maximum output current is up to 5A.
- What is the quiescent current in sleep mode?
The quiescent current in sleep mode is typically 40µA.
- Can the switching frequency be adjusted?
Yes, the switching frequency can be adjusted from 200 kHz to 2.5 MHz.
- Does the LMR14050SDDA support frequency synchronization?
Yes, it supports frequency synchronization to an external clock within the 250 kHz to 2.3 MHz range.
- What kind of protection features does the LMR14050SDDA have?
The device includes thermal, overvoltage, and short-circuit protection, as well as cycle-by-cycle current limiting.
- How is the soft-start time controlled?
The soft-start time is controlled by connecting a capacitor to the SS pin.
- What is the package type and size of the LMR14050SDDA?
The package type is an 8-pin HSOIC with PowerPAD™, and the package size is 4.9mm × 6mm.
- What are some typical applications of the LMR14050SDDA?
Typical applications include automotive battery regulation, industrial power supplies, telecom and datacom systems, and battery-powered systems.
- How is the enable input controlled?
The enable input can be controlled by an external logic signal or through a precision enable input with an internal pullup current source.
