LM22671MRE-ADJ

• Wide input voltage range: 4.5V to 42V
• Internally compensated voltage mode control
• Stable and low ESR ceramic capacitors
• 200mΩ N-channel MOSFETs
• Output Voltage Options:

• - ADJ (e.g. 1.285V low output)

• -5.0 (fixed 5V output)
• Feedback reference accuracy± 1.5%
• The switching frequency is 500 kHz, adjustable between 200 kHz and 1 MHz
• -40°C to 125°C operating junction temperature range
• Precision enable pins
• Integrated starter diode
• Adjustable soft start
• Full WEBENCH ® enable
• Buck and reversed-phase buck-boost applications
• LM22671Q is automotive-grade and AEC-Q100 qualified (-40°C to +125°C operating junction temperature)

illustrate

The LM22671 series of regulators are monolithic integrated circuits that are capable of driving loads up to 500 milliamps with excellent line and load regulation characteristics for step-down (buck) switching regulators. The high efficiency (> 90%) is achieved by using a low-resistance N-channel MOSFET. The series consists of a fixed 5V output and an adjustable version.

SIMPLE SWITCHER ® The concept offers an easy-to-use complete design using a minimum number of external components and WEBENCH for national semiconductors ® Design tools. WEBENCH of National Semiconductor ® Tools include features such as external component calculations, electrical simulation, thermal simulation, and simple design, construction, and other boards. The switching clock frequency is made by an internal fixed-frequency oscillator, which is 500 kHz. The switching frequency can also be adjusted with an external resistor or with an external clock synchronization of up to 1 MHz. It can also automatically synchronize multiple regulators to share the same switching frequency. LM22671 series also features built-in thermal shutdown, current limiting, and enable control inputs that can adjust quiescent current standby up and down to 25μA of low power. An adjustable soft-start function is by selecting the appropriate external soft-start capacitor.

apply

• Industrial control
• Telecommunications and data communication systems
• Embedded systems
• Automotive telematics and body electronics
• Conversion of standard 24V, 12V, and 5V input voltage rails