LM22676MRX-ADJ/NOPB

The LM22676 switching regulator provides all of the functions necessary to implement an efficient high voltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42V N-channel MOSFET switch capable of providing up to 3A of load current. Excellent line and load regulation along with high efficiency (>90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5V output and adjustable output voltage options are available. A switching frequency of 500 kHz allows for small external components and good transient response. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 μA (typ.). Built in soft-start (500 μs, typ) saves external components. The LM22676 also has built in thermal shutdown, and current limiting to protect against accidental overloads.

Applications

• Industrial Control
• Telecom and Datacom Systems
• Embedded Systems
• Conversions from Standard 24V, 12V and 5V Input Rails

Key features

• Wide Input Voltage Range: 4.5V to 42V
• Internally Compensated Voltage Mode Control Stable with Low ESR Ceramic Capacitors
• 120 mΩ N-Channel MOSFET PFM Package
• 100 mΩ N-Channel MOSFET PSOP-8 Package
• Output Voltage Options:
• ADJ (Outputs as Low as 1.285V)
• 5.0 (Output Fixed to 5V)
• ±1.5% Feedback Reference Accuracy
• Switching Frequency of 500 kHz
• -40°C to 125°C Operating Junction Temperature Range
• Precision Enable Pin
• Integrated Boot-Strap Diode
• Integrated Soft-Start
• Fully WEBENCH Enabled
• LM22676Q is an Automotive Grade Product that is AEC-Q100 Grade 1 Qualified (-40°C to 125°C Operating Junction Temperature)