Product details


Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 1 Vout (Max) (V) 18 Iout (Max) (A) 1.5 Iq (Typ) (uA) 2400 Switching frequency (Min) (kHz) 1750 Switching frequency (Max) (kHz) 2300 Features Enable, Light Load Efficiency Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HVSSOP (DGQ) 10 9 mm² 3 x 3 WSON (DSC) 10 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)


  • Space-Saving, 3 mm × 3 mm 10-Pin WSON and MSOP-PowerPAD Packages
  • Wide Input Voltage Range: 3 V to 20 V
  • Wide Output Voltage Range: 1 V to 18 V
  • LM27341 Delivers 1.5-A Maximum Output Current
  • LM27342 Delivers 2-A Maximum Output Current
  • High Switching Frequency: 2 MHz
  • Frequency Synchronization:
    1 MHz < fSW < 2.35 MHz
  • 150-mΩ NMOS Switch With Internal Bootstrap Supply
  • 70-nA Shutdown Current
  • Internal Voltage Reference Accuracy of 1%
  • Peak Current-Mode, PWM Operation
  • Thermal Shutdown
  • LM27341-Q1 and LM27342-Q1 are AEC-Q100 Grade 1 Qualified and Manufactured on an Automotive Grade Flow
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The LM2734x and LM2734x-Q1 regulators are monolithic, high-frequency, PWM step-down DC-DC converters in 10-pin WSON and 10-pin MSOP-PowerPAD packages. They contain all the active functions to provide local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.

With a minimum of external components, the LM2734x and LM2734x-Q1 are easy to use. The ability to drive 1.5-A or 2-A loads respectively, with an internal 150-mΩ NMOS switch results in the best power density available. The world-class control circuitry allows for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown is included, which features an ultra-low shutdown current of 70 nA. The LM2734x and LM2734x-Q1 use peak current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.

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Exact equivalent in functionality and parametrics to the compared device:
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Similar but not functionally equivalent to the compared device:
LM27341-Q1 ACTIVE 1.5A - Wide Input Range Buck Regulator with Frequency Synchronization Auto-qualified version
LM27342-Q1 ACTIVE 2A - Wide Input Range Buck Regulator with Frequency Synchronization 2-A Auto-qualified version
LM2738 ACTIVE 550kHz/1.6MHz 1.5A Step-Down DC-DC Switching Regulator 1.5 A, non-sync DC/DC.

Technical documentation

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Type Title Date
* Data sheet LM2734x and LM2734x-Q1 2-MHz, 1.5-A or 2-A, Wide Input Range, Step-Down, DC-DC Regulator With Frequency Synchronization datasheet (Rev. F) Sep. 12, 2016
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide AN-1929 LM27342 Demonstration Board (Rev. A) Apr. 24, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr. 23, 2013
Application note AN-1973 Benefits and Challenges of High-Frequency Regulators (Rev. A) Apr. 23, 2013

Design & development

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CAD/CAE symbols

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HVSSOP (DGQ) 10 View options
WSON (DSC) 10 View options

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