LM2735XSD/NOPB

The LM2735 device is an easy-to-use, space-efficient 2.1A low-side switch regulator, ideal for boost and SEPIC DC/DC regulation. The device provides all active functions to deliver local DC/DC conversion with fast transient response and precise regulation in minimum PCB area. The switching frequency is internally set to 520kHz or 1.6MHz, allowing the use of very small surface-mount inductors and chip capacitors while delivering up to 90% efficiency. Current-mode control and internal compensation provide easy-to-use, minimum component count, high-performance regulation across a wide range of operating conditions. External shutdown with 80nA ultra-low standby current makes it ideal for portable solutions. Space-saving miniature SOT-23, WSON, and MSOP-PowerPAD packages are available. Additional features include internal soft-start, inrush current limiting circuitry, pulse-by-pulse current limiting, and thermal shutdown.

Applications

• LCD backlight for portable applications
• OLED panel power supply
• USB-powered devices
• Digital cameras and camcorders
• White LED current source

Key features

• Input voltage range: 2.7V to 5.5V
• Output voltage range: 3V to 24V
• 2.1A switch current over full temperature range
• Current mode control
• Logic-high enable pin
• 80nA ultra-low quiescent current in shutdown mode
• 170mΩ NMOS switch
• ±2% feedback voltage accuracy
• Easy-to-use compact solution footprint
• Internal soft-start
• Internal compensation
• Two switching frequencies: 520kHz (LM2735-Y), 1.6MHz (LM2735-X)
• Small SMT inductors and chip capacitors
• Tiny SOT-23, WSON, and MSOP-PowerPAD packages