LM2733YMF/NOPB

The LM2733 switching regulators are current-mode boost converters operating fixed frequency of 1.6 MHz (“X” option) and 600 kHz (“Y” option). The use of SOT-23 package, made possible by the minimal power loss of the internal 1-A switch and use of small inductors and capacitors, results in the industry's highest power density. The 40-V internal switch makes these solutions perfect for boosting to voltages of 16 V or greater. These parts have a logic-level shutdown pin that can be used to reduce quiescent current and extend battery life. Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.

Applications

• White LED current source
• PDAs and palm-top computers
• Digital cameras
• Portable phones and games
• Local boost regulator

Key features

• 40-V DMOS FET switch
• 1.6-MHz (“X”), 0.6 MHz (“Y”) Switching frequency
• Low RDS(ON) DMOS FET Switch current up to 1 A
• Wide input voltage 2.7 V to 14 V
• Low shutdown current (<1 μA)
• 5-Pin SOT-23 package
• Uses tiny capacitors and inductors
• Cycle-by-cycle current limiting
• Internally compensated