Product details

Vin (Min) (V) 2.7 Vin (Max) (V) 14 Vout (Min) (V) 3 Vout (Max) (V) 40 Switch current limit (Typ) (A) 1.5 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 1850 Iq (Typ) (mA) 1.1 Features Enable, Light Load Efficiency Duty cycle (Max) (%) 96 Operating temperature range (C) -40 to 125 Rating Catalog
Vin (Min) (V) 2.7 Vin (Max) (V) 14 Vout (Min) (V) 3 Vout (Max) (V) 40 Switch current limit (Typ) (A) 1.5 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 1850 Iq (Typ) (mA) 1.1 Features Enable, Light Load Efficiency Duty cycle (Max) (%) 96 Operating temperature range (C) -40 to 125 Rating Catalog
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet LM2733 0.6- and 1.6-MHz Boost Converters With 40-V Internal FET Switch in SOT-23 datasheet (Rev. G) 03 May 2019
Application note Extend the Output Voltage Range With a Coupling Inductor 20 Sep 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note 用LM2733XMF设计用于雪崩光电二极管(APD)的高升压比偏置电源 08 Apr 2018
User guide AN-1280 LM2731/LM2733 Evaluation Board (Rev. B) 24 Apr 2013

Design & development

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Evaluation board

LM2733YEVAL — 0.6 1.6 MHz Boost Converters with 40V Internal FET Switch Evaluation Module

LM2733Y 0.6MHz Boost Converter With 40V Internal FET Switch

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

PMP10703 — 9V to 14Vin, Isolated +/- 15V/100mA Output Flyback Reference Design Solution with LM2733

The PMP10703.1 is an isolated dual output flyback solution which accepts an input voltage of 9V to 14Vin and provides a ±15V output to power the amplifier. With tiny size of the LM2733 and primary control, the reference design’s total solution size is very small and could be used for (...)
Package Pins Download
SOT-23 (DBV) 5 View options

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