LM2735

ACTIVE

520kHz/1.6MHz space efficient boost and SEPIC DC-DC regulator

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 520 Switching frequency (max) (kHz) 1600 Features Enable, Nonsynchronous rectification Vout (min) (V) 3 Vout (max) (V) 24 Iq (typ) (µA) 7000 Duty cycle (max) (%) 99
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Boost Type Converter Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 520 Switching frequency (max) (kHz) 1600 Features Enable, Nonsynchronous rectification Vout (min) (V) 3 Vout (max) (V) 24 Iq (typ) (µA) 7000 Duty cycle (max) (%) 99
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 WSON (NGG) 6 9 mm² 3 x 3
  • Input Voltage Range: 2.7 V to 5.5 V
  • Output Voltage Range: 3 V to 24 V
  • 2.1-A Switch Current Over Full Temperature Range
  • Current-Mode Control
  • Logic High Enable Pin
  • Ultra-Low Standby Current of 80 nA in Shutdown
  • 170-mΩ NMOS Switch
  • ±2% Feedback Voltage Accuracy
  • Ease-of-Use, Small Total Solution Size
    • Internal Soft Start
    • Internal Compensation
    • Two Switching Frequencies
    • 520 kHz (LM2735-Y)
    • 1.6 MHz (LM2735-X)
    • Uses Small Surface Mount Inductors and Chip Capacitors
    • Tiny SOT-23, WSON, and MSOP-PowerPAD™ Packages
  • Create a Custom Design Using the LM2735 With WEBENCH® Power Designer
  • Input Voltage Range: 2.7 V to 5.5 V
  • Output Voltage Range: 3 V to 24 V
  • 2.1-A Switch Current Over Full Temperature Range
  • Current-Mode Control
  • Logic High Enable Pin
  • Ultra-Low Standby Current of 80 nA in Shutdown
  • 170-mΩ NMOS Switch
  • ±2% Feedback Voltage Accuracy
  • Ease-of-Use, Small Total Solution Size
    • Internal Soft Start
    • Internal Compensation
    • Two Switching Frequencies
    • 520 kHz (LM2735-Y)
    • 1.6 MHz (LM2735-X)
    • Uses Small Surface Mount Inductors and Chip Capacitors
    • Tiny SOT-23, WSON, and MSOP-PowerPAD™ Packages
  • Create a Custom Design Using the LM2735 With WEBENCH® Power Designer

The LM2735 device is an easy-to-use, space-efficient 2.1-A low-side switch regulator, ideal for Boost and SEPIC DC/DC regulation. The device provides all the active functions to provide local DC-DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520 kHz or 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors, while providing efficiencies of up to 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA, ideal for portable applications. Tiny SOT-23, WSON, and MSOP-PowerPAD packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

The LM2735 device is an easy-to-use, space-efficient 2.1-A low-side switch regulator, ideal for Boost and SEPIC DC/DC regulation. The device provides all the active functions to provide local DC-DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520 kHz or 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors, while providing efficiencies of up to 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA, ideal for portable applications. Tiny SOT-23, WSON, and MSOP-PowerPAD packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

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Technical documentation

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Type Title Date
* Data sheet LM2735 520-kHz and 1.6-MHz Space-Efficient Boost and SEPIC DC/DC Regulator datasheet (Rev. I) PDF | HTML 05 Sep 2018
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Design of UVLO for LM27313 (Rev. B) 08 Apr 2014
EVM User's guide AN-1668 LM2735Y 8-Pin eMSOP Demo Board (Rev. B) 25 Apr 2013
EVM User's guide AN-1660 LM2735Y 6-Pin LLP Demo Board (Rev. A) 24 Apr 2013
EVM User's guide AN-1664 LM2735X 5-Pin SOT23 Demo Board (Rev. B) 24 Apr 2013
EVM User's guide AN-1665 LM2735Y 5-Pin SOT23 Demo Board (Rev. B) 24 Apr 2013
EVM User's guide AN-1666 LM2735X 6-Pin LLP Demo Board (Rev. A) 24 Apr 2013
EVM User's guide AN-1667 LM2735X 8-Pin eMSOP Demo Board (Rev. A) 24 Apr 2013
Application note AN-1658 LM2735 BOOST and SEPIC DC-DC Regulator (Rev. A) 23 Apr 2013
User guide High Efficiency Portable Media Player (PMP) Dock Station User Guide 27 Jan 2012

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