LM2733 Datasheet | National Semiconductor

LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23 February 2003 LM2733 0.6/1.6 MHz Boost Converters With 40V Internal FET Switch in SOT-23 General Description The LM2733 switching regulators are current-mode boost converters operating fixed frequency of 1.6 MHz (“X” option) and 600 k Hz (“Y” option). The use of SOT-23 package, made possible by the minimal power loss of the internal 1A switch, and use of small inductors and capacitors result in the industry’s highest power density. The 40V internal switch makes these solutions perfect for boosting to voltages of 16V 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 pensation simplifies design and reduces ponent count. Switch Frequency X 1.6 MHz Y 0.6 MHz Features n n n n n n n n n n 40V DMOS FET switch 1.6 MHz (“X”), 0.6 MHz (“Y”) switching frequency Low RDS(ON) DMOS FET Switch current up to 1A Wide input voltage range (2.7V- 14V) Low shutdown current ( < 1 µA) 5-Lead SOT-23 package Uses tiny capacitors and inductors Cycle-by-cycle current limiting Internally pensated Applications n n n n n White LED Current Source PDA’s and Palm-Top puters Digital Cameras Portable Phones and Games Local Boost Regulator Typical Application Circuit © 2003 National Semiconductor Corporation DS200554 .national. Typical Application Circuit (Continued) Connection Diagram Top View 5-Lead SOT-23 Package See NS Package Number MF05A Ordering Information Order Number Package Type Package Drawing LM2733XMF LM2733XMFX LM2733YMF LM2733YMFX SOT23-5 MF05A Supplied As 1K Tape and Reel 3K Tape and Reel 1K Tape and Reel 3K Tape and Reel Package ID S52A S52A S52B S52B Pin Description Pin 1 2 3 4 5 Name SW GND FB SHDN VIN Drain of the internal FET...