The LM22676 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator capable of driving up to 500mA load current with excellent line and load regulation characteristics. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator. The LM22676 offers high efficiency and thermal shutdown protection. The adjustable version can provide an output voltage from 1.285V to 37V. This particular part is automotive qualified.

Applications:

• Automotive Power Systems
• Industrial Power Supplies
• Point-of-Load Regulators
• Battery-Powered Systems
• General Purpose Step-Down Conversion

Features:

• Input voltage range: 4.5V to 42V
• Adjustable output voltage from 1.285V to 37V
• 500mA output current capability
• High efficiency up to 90%
• Fixed-frequency operation (500 kHz)
• Internal current limit and thermal shutdown protection
• Simple external component selection
• Automotive qualified

Benefits:

• Efficient step-down conversion, minimizing power dissipation
• Wide input voltage range accommodates various power sources
• Adjustable output voltage for design flexibility
• Robust protection features ensure reliable operation
• Small solution size due to minimal external components
• Suitable for automotive applications due to automotive qualification.

Additional Details:

The LM22676QTJE-ADJ utilizes a peak current mode control architecture to regulate the output voltage. The device includes an internal oscillator, error amplifier, and power MOSFET. External components, such as an inductor, capacitor, and resistor divider, are required to complete the regulator circuit. The switching frequency is internally set to 500 kHz, allowing for smaller external components and improved transient response. The device is available in a thermally enhanced HTSSOP-16 package, which provides excellent thermal performance. Datasheets provide detailed information on component selection, layout guidelines, and thermal considerations.