LM2733 0.6- and 1.6-MHz Boost Converters With 40-V Internal FET Switch in SOT-23

1

1 Features 1• 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

2 Applications • White LED current source • PDAs 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, 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.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)

LM2733 SOT-23 (5) 2.90 mm × 1.60 mm

(1) For all available packages, see the orderable addendum at

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