LM2678SX-ADJ

• Conversion efficiency up to 92%
• Easy-to-use design (with off-the-shelf external components)
• 120mΩ DMOS output switch
• Fixed output and adjustable (1.2V to 37V) versions of 3.3V, 5V and 12V
• When the standby current of 50μA is disconnected,
• The entire line exceeds up to ± 2% output tolerance and load conditions
• Wide input voltage range from 8V to 40V:
• 260 kHz fixed frequency internal oscillator
• Operating junction temperature range from -40 to +125 °C

illustrate

TheLM2678 series regulators are monolithic integrated circuits that provide step-down switching regulators capable of driving excellent line and load regulation characteristics for 5A load (buck) all the positive functions. High efficiency (> 90%) is obtained by using a low-on-resistance DMOS power switch. The series includes fixed output voltages of 3.3V, 5V and 12V and adjustable output versions.

The concept of the SIMPLE SWITCHER provides a complete design with the use of a minimum number of external components. A higher fixed frequency oscillator (260KHz) allows the use of smaller size components. A standard inductor used in the LM2678 series is supplied from several manufacturers, greatly simplifying the design process.

The LM2678 series also features built-in thermal shutdown, current limiting, and an ON/OFF control input that can adjust up and down the standby state of low quiescent current with a power of 50μA. The output voltage is guaranteed to be a tolerance of ± 2%. The clock frequency is controlled at tolerance ± 11%.

apply

• Simple design, high efficiency (> 90%), step-down switching regulator
• Efficient system pre-regulator linear regulator
• Battery charger