LM3478QMM

• Manufactured in LM3478Q AEC-Q100 standard and automotive-grade flow in an MSOP-8 package
• Small 8-pin SO8 (MSOP-8) and SO-8 packages
• Peak current capability of 1A for internal push-pull drives
• Current limiting and thermal shutdown
• Optimized frequency compensation with a capacitor and a resistor
• Internal soft start
• Current mode operation
• Hysteresis undervoltage locking

illustrate

The LM3478 is a versatile low-side N-channel MOSFET switching regulator controller. It is suitable for use of a low-side MOSFET such as boost, flyback, SEPIC, etc., in addition, the LM3478 can be operated at very high switching frequencies to reduce the overall solution size in the topology. The LM3478 switches at any value between 100kHz and 1MHz and can be adjusted by using an external resistor. Current mode control provides superior bandwidth and transient response, in addition to cycle-by-cycle current limiting. The output current can be programmed with a single external resistor.

The LM3478 has built-in features such as thermal shutdown, short-circuit protection, overvoltage protection, and other power-saving shutdown modes that reduce the total supply current by 5μA and allow power sequencing. Internal soft start limits inrush current at start-up.

Key specifications:

• 2.Wide supply voltage range from 2.97V to 40V
• Adjustable clock frequency from 100kHz to 1MHz
• ± 2.5% (overheated) internal reference
• 10μA Shutdown Current (Over Temperature)

apply

• Distributed power systems
• Battery charger
• Offline power supply
• Telecom power supply
• Automotive powertrains