LM2733XMF Power Regulator IC Switching Voltage Regulators NRND, alternate is LM2733XMF/NOPB

1 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 1A

• Wide Input Voltage Range (2.7 V – 14 V)

• Low Shutdown Current (< 1 μA)

• 5-Lead SOT-23 Package

• Uses Tiny Capacitors and Inductors

• Cycle-by-Cycle Current Limiting

• Internally Compensated

  
  

2 Applications

• White LED Current Source

• PDA’s and Palm-Top Computers

• Digital Cameras

• Portable Phones and Games

• Local Boost Regulator

3 Description

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 result 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.

Device Information