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


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 open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 open-in-new Find other Boost converters (integrated switch)


  • 40-V DMOS FET switch
  • 1.6-MHz (“X”), 0.6 MHz (“Y”) Switching frequency
  • 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

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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.

open-in-new Find other Boost converters (integrated switch)
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Technical documentation

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

Design & development

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Hardware development

document-generic User guide

LM2733Y 0.6MHz Boost Converter With 40V Internal FET Switch

  • 40V DMOS FET switch
  • 0.6MHz switching frequency
  • Switch current up to 1A
  • Wide input voltage range (2.7V-14V)
  • Low shutdown current (<1µA)
  • 5-lead SOT-23 package
  • Uses tiny capacitors and inductors
  • Cycle-by cycle current limiting
  • Internally compensated


  • White LED current source
  • PDA's (...)

Design tools & simulation

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Reference designs

9V to 14Vin, Isolated +/- 15V/100mA Output Flyback Reference Design Solution with LM2733
PMP10703 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 an (...)
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CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

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