LM22674MR-ADJ/NOPB

The LM22674 switching regulator uses a minimal number of external components to provide all the functions needed to implement a high-efficiency, high-voltage step-down regulator. This easy-to-use regulator integrates a 42V N-channel MOSFET switch capable of delivering up to 500mA of load current, with excellent line and load regulation and high efficiency (>90%). Voltage-mode control provides a short minimum on-time, enabling the widest input-to-output voltage ratio. Internal loop compensation eliminates the need for users to calculate loop compensation components. The regulator is available in both a fixed 5V output and an adjustable output voltage option. The 500kHz switching frequency allows the use of small external components and achieves good transient response. A precision enable input simplifies regulator control and system power sequencing. In shutdown mode, the regulator draws only 25μA (typical) of quiescent current. The built-in soft-start function (500μs typical) saves external components. The LM22674 also incorporates thermal shutdown and current limiting to protect the device against accidental overload.

Applications

• Industrial control
• Telecom and data communication systems
• Embedded systems
• Conversion from 24V, 12V, and 5V standard input power rails

Key features

• Wide input voltage range: 4.5V to 42V
• Internal compensation voltage mode control
• Stable operation with low-ESR ceramic capacitors
• 200mΩ N-channel MOSFET
• Output voltage options:
• ADJ (minimum output voltage 1.285V)
• 5.0 (fixed output voltage 5V)
• ±1.5% feedback reference accuracy
• 500kHz switching frequency
• -40℃ to 125℃ operating junction temperature range
• Precision enable pin
• Integrated bootstrap diode
• Integrated soft-start
• Fully WEBENCH(⊥) enabled
• LM22674-Q1 is an automotive-grade product compliant with AEC-Q100 Grade 1 (operating junction temperature range: -40℃ to +125℃)
• Small outline (SO) PowerPAD (exposed pad)