LM2735-Q1

ACTIVE

520kHz/1.6MHz space eEfficient boost and SEPIC DC-DC regulator, AEC-Q100 qualified

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Product details

Parameters

Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Vout (Min) (V) 3 Vout (Max) (V) 24 Switch current limit (Typ) (A) 2.25 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 520 Switching frequency (Max) (kHz) 1600 Iq (Typ) (mA) 7 Features Enable Duty cycle (Max) (%) 99 Operating temperature range (C) -40 to 125 Rating Automotive open-in-new Find other Boost converters (integrated switch)

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 WSON (NGG) 6 9 mm² 3 x 3 open-in-new Find other Boost converters (integrated switch)

Features

  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Range
  • 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 and WSON Packages
  • Create a Custom Design Using the LM2735-Q1 With the WEBENCH® Power Designer

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

Description

The LM2735-Q1 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%. The device can be used as a post-boost, boosting from the main automotive system 3.3V rail to power CAN transceivers and other circuits requiring 5V. The 24V output capability allows the LM2735-Q1 to power audio amplifiers, antenna, power-over-coax (PoC), and automotive audio bus (A2B) devices as well.

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 and WSON packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.

open-in-new Find other Boost converters (integrated switch)
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Same functionality and pinout but is not an equivalent to the compared device:
LM2735 ACTIVE 520kHz/1.6MHz space efficient boost and SEPIC DC-DC regulator Commercial grade version.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM2735-Q1 520-kHz and 1.6-MHz Space-Efficient Boost and SEPIC DC/DC Regulator datasheet Sep. 12, 2018
User guides AN-1668 LM2735Y 8-Pin eMSOP Demo Board (Rev. B) Apr. 25, 2013
User guides AN-1660 LM2735Y 6-Pin LLP Demo Board (Rev. A) Apr. 24, 2013
User guides AN-1664 LM2735X 5-Pin SOT23 Demo Board (Rev. B) Apr. 24, 2013
User guides AN-1665 LM2735Y 5-Pin SOT23 Demo Board (Rev. B) Apr. 24, 2013
User guides AN-1666 LM2735X 6-Pin LLP Demo Board (Rev. A) Apr. 24, 2013
User guides AN-1667 LM2735X 8-Pin eMSOP Demo Board (Rev. A) Apr. 24, 2013
Application notes AN-1658 LM2735 BOOST and SEPIC DC-DC Regulator (Rev. A) Apr. 23, 2013
User guides High Efficiency Portable Media Player (PMP) Dock Station User Guide Jan. 27, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
49
Description

The demo board included in this shipment converts 3V to 5.5V input to 3.3V output for up to 500mA load current using the LM2735X 1.6MHz DC-DC switching converter. This is a 2- layer board using the bottom layer as a ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The demo board included in this shipment uses the LM2735X 1.6MHz DC-DC switching regulator that converts 3V to 5.5V input to 12V output for up to 500mA load current depending on Vin. This is a 2-layer board using the bottom layer as a Ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735Y 520kHz DC-DC switching converter in the 8-Pin eMSOP package. This is a 2-layer board using the bottom layer as a Ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735X 1.6MHz DC-DC switching converter. This is a 2-layer board using the bottom layer as a ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735Y 520kHz DC-DC switching converter. This is a 2-layer board using the bottom layer as a ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735X 1.6MHz DC-DC switching converter in the 8-Pin eMSOP package. This is a 2-layer board using the bottom layer as a ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)
EVALUATION BOARDS Download
document-generic User guide
49
Description

The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735Y 520kHz DC-DC switching converter. This is a 2-layer board using the bottom layer as a Ground plane.

Features
  • Input voltage range 2.7V to 5.5V
  • Output voltage range 3V to 24V
  • 2.1A switch current over full temperature range
  • Current-Mode control
  • Logic high enable pin
  • Ultra low standby current of 80 nA in shutdown
  • 170Ωm NMOS switch
  • 2% feedback voltage accuracy
  • Ease-of-use, small total solution size
          • Internal soft-start
    (...)

Design tools & simulation

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SIMULATION TOOLS Download
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PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
Fly-Buck and Flyback Topology Selector
FLYBUCK-FLYBACK-DESIGN-CALC This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Features
  • Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
  • Capability to design up to 6 isolated outputs
  • Recommends ICs for desired application design
  • Incorporates loop compensation in designs
  • Compares efficiency, external component count and transformer currents for every topology (...)
CAD/CAE SYMBOLS Download
SNLC003.ZIP (125 KB)

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options
WSON (NGG) 6 View options

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