LM2734

ACTIVE

3V to 20V Input, 1A Step-Down Converter with Light Load Efficiency

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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 20 Vout (Min) (V) 0.8 Vout (Max) (V) 18 Iout (Max) (A) 1 Iq (Typ) (mA) 2.1 Iq (Typ) (uA) 2100 Switching frequency (Min) (kHz) 400 Switching frequency (Max) (kHz) 1900 Features Enable, Light Load Efficiency, Pre-Bias Start-Up Operating temperature range (C) -40 to 125 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

SOT-23-THN (DDC) 6 5 mm² 2.9 x 1.6 open-in-new Find other Buck converters (integrated switch)

Features

  • Thin SOT-6 Package
  • 3-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1-A Output Current
  • 550-kHz (LM2734Y) and 1.6-MHz (LM2734X) Switching Frequencies
  • 300-mΩ NMOS Switch
  • 30-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown
  • Create a Custom Design Using the LM2734 With WEBENCH® Power Designer

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Description

The LM2734 regulator is a monolithic, high-frequency, PWM step-down DC/DC converter in a 6-pin Thin SOT package. The device provides 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 and online design support through WEBENCH, the LM2734 regulator is easy to use. The ability to drive 1-A loads with an internal 300-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. The world-class control circuitry allows for on-times as low as 13 ns, thus supporting exceptionally high-frequency conversion over the entire 3-V to 20-V input operating range down to the minimum output voltage of 0.8 V. Switching frequency is internally set to 550 kHz (LM2734Y) or 1.6 MHz (LM2734X), allowing the use of extremely small surface-mount inductors and chip capacitors. Even though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA.

The LM2734 regulator uses 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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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet LM2734 Thin SOT 1-A Load Step-Down DC/DC Regulator datasheet (Rev. K) Aug. 23, 2018
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guide AN-1350 LM2734 Evaluation Board (Rev. A) Apr. 24, 2013
User guide High-IF Sub-sampling Receiver Subsystem User Guide Jan. 27, 2012
Application note Advanced Topics in Powering FPGAs Mar. 22, 2007
Application note Power Management Considerations for FPGAs and ASICs Mar. 22, 2007

Design & development

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

Hardware development

EVALUATION BOARD Download
49
Description

LM2734 Thin SOT-23 1A Load Step-Down DC-DC Regulator

Features
  • Thin SOT-23-6 package
  • 3.0V to 20V input voltage range
  • 0.8V to 18V output voltage range
  • 1A output current
  • 550kHz (LM2734Y) and 1.6MHz (LM2736X) switching frequencies
  • 300m ohm NMOS switch
  • 30nA shutdown current
  • 0.8V, 2% internal voltage reference
  • Internal soft-start
  • Current-Mode, PWM operation
  • WEBENCH online (...)

Design tools & simulation

SIMULATION MODEL Download
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SIMULATION TOOL Download
PSpice® for TI design and simulation tool
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
  • (...)
CAD/CAE SYMBOL Download
SNAC012.ZIP (3259 KB)

CAD/CAE symbols

Package Pins Download
SOT-23-THIN (DDC) 6 View options

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