LM2731XMFX/NOPB

The LM2731 switching regulators are current-mode boost converters operating at fixed frequencies 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 1.8-A switch, and use of small inductors and capacitors result in the highest power density of the industry. The 22-V internal switch makes these solutions perfect for boosting to voltages up to 20 V. These parts have a logic-level shutdown pin that can 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 Sources
• PDAs and Palm-Top Computers
• Digital Cameras
• Portable Phones and Games Local Boost Regulators

Key features

• 22-V DMOS FET Switch
• 1.6-MHz (X Option), 0.6-MHz (Y Option) Switching Frequency
• Low RDS(ON) DMOS FET Switch Current Up to 1.8 A
• Wide Input Voltage Range (2.7 V to 14 V)
• Low Shutdown Current (<1 μA)
• 5-Lead SOT-23 Package
• Uses Tiny Capacitors and Inductors
• Cycle-by-Cycle Current Limiting
• Internally Compensated