PMIC - Voltage Regulators - DC DC Switching Regulators

The LMR14050SQDPRTQ1 is a step down, synchronous, fixed voltage DC to DC switching regulator. It uses a constant frequency, current-mode control architecture for superior performance with low noise and transient response. The LMR14050SQDPRTQ1 operates over a wide input voltage range of 3V to 36V and allows the output voltage to be adjusted down to 0.8V. The device features a maximum input current rating of 4A and a maximum output current of 2.5A. The switching frequency can be programmed up to 1.2MHz.

The LMR14050SQDPRTQ1 is suitable for a wide range of applications in the industrial and automotive markets. It is ideal for applications where higher efficiency and lower noise are needed, such as motor control, LED lighting, and power distribution. It can be used to construct isolated power supplies with the addition of an external transformer and rectifier circuit, and can be used for powering various ICs at lower output currents. The device includes short-circuit and thermal protection, as well as a power-good output for monitoring the output voltage.

Application Field

• Motor Control
• LED Lighting
• Power Distribution
• Isolated Power Supplies
• Powering ICs

Working Principle

The LMR14050SQDPRTQ1 works by using a Pulse Width Modulation (PWM) control system to convert a variable input voltage into a preset output voltage. The device works by charging and discharging an internal inductor. The main components of the regulator are a MOSFET switch, a high-side drive transistor, an operational amplifier, and an error amplifier. When the switch is on, the current flows through the inductor, and when the switch is off, the inductor releases the energy to the output. The amount of energy stored in the inductor is determined by the on time of the switch. The device\'s PWM control system adjusts the on time to maintain the output voltage. The LMR14050SQDPRTQ1 also utilizes current-mode control and a transconductance error amplifier to achieve high-precision output voltage regulation. The device includes an internal soft-start circuit and short-circuit and thermal protection.

The LMR14050SQDPRTQ1 is a highly efficient and reliable solution for a variety of voltage regulation applications. It is capable of operating in a wide input voltage range and is capable of driving high current output. The device features current-mode control, soft-start, and short-circuit protection to ensure safe and reliable operation. The device is also easy to use, with an adjustable output voltage and programmable switching frequency. All these features make the LMR14050SQDPRTQ1 a perfect fit for a variety of industrial and automotive applications.