Overview
The LMR14006XDDCT is a high-efficiency, 40 V, 600 mA step-down (buck) regulator produced by Texas Instruments. This device is part of the SIMPLE SWITCHER® family and is designed to provide a wide input voltage range of 4 V to 40 V, making it suitable for various applications including industrial, automotive, and battery-powered equipment. The regulator features a low quiescent current in sleep mode, which is beneficial for prolonging battery life in portable and handheld devices. It operates at fixed switching frequencies of 1.1 MHz or 2.1 MHz, allowing the use of smaller external components while maintaining low output ripple voltage.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4 | - | 40 | V |
| Output Current | - | - | 600 | mA |
| Switching Frequency | 935/1785 | 1100/2100 | 1285/2415 | kHz |
| Feedback Voltage | 0.747 | 0.765 | 0.782 | V |
| Standby Current | - | 28 | - | µA |
| Shutdown Current | - | 1 | - | µA |
| Thermal Shutdown | - | 170 | - | °C |
| Package Type | - | - | TSOT-6L | - |
Key Features
- Ultra-low 28 µA standby current in sleep mode and 1 µA shutdown current to prolong battery life.
- High duty cycle operation supported with internal soft start to minimize inrush currents.
- Internal compensation and boot recharge diode to reduce external component count.
- Fixed frequency PWM control with options for 1.1 MHz and 2.1 MHz switching frequencies.
- High voltage enable input and internal pull-up current source for easy enable/disable functionality.
- Overcurrent protection, overtemperature protection, and overvoltage transient protection for robust operation.
- Small overall solution size with TSOT-6L package.
Applications
- Industrial distributed power systems.
- Automotive power conditioning systems.
- Battery-powered equipment.
- Portable handheld instruments.
- Portable media players.
Q & A
- What is the input voltage range of the LMR14006XDDCT?
The input voltage range is from 4 V to 40 V.
- What are the available switching frequencies for the LMR14006XDDCT?
The device operates at fixed switching frequencies of 1.1 MHz or 2.1 MHz.
- What is the typical feedback voltage for the LMR14006XDDCT?
The typical feedback voltage is 0.765 V.
- How does the LMR14006XDDCT manage overcurrent conditions?
The device implements current mode control with an internal COMP voltage to turn off the high side MOSFET on a cycle-by-cycle basis.
- What is the thermal shutdown threshold for the LMR14006XDDCT?
The thermal shutdown threshold is 170°C.
- How does the LMR14006XDDCT reduce external component count?
The device integrates the boot recharge diode and internal compensation circuits.
- What is the standby current in sleep mode for the LMR14006XDDCT?
The standby current in sleep mode is 28 µA.
- What is the shutdown current for the LMR14006XDDCT?
The shutdown current is approximately 1 µA.
- What package type is the LMR14006XDDCT available in?
The device is available in a TSOT-6L package.
- What are some common applications for the LMR14006XDDCT?
Common applications include industrial distributed power systems, automotive power conditioning, battery-powered equipment, and portable handheld instruments.
