LM2734Z

ACTIVE

3 to 20 V input, 1 A, high frequency 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) 1.5 Iq (Typ) (uA) 1500 Switching frequency (Min) (kHz) 2200 Switching frequency (Max) (kHz) 3600 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 WSON (NGG) 6 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • 6-pin SOT Package, or 6-Pin WSON Package
  • 3.0-V to 20-V Input Voltage Range
  • 0.8-V to 18-V Output Voltage Range
  • 1-A Output Current
  • 3-MHz Switching Frequency
  • 300-mΩ NMOS Switch
  • 30-nA Shutdown Current
  • 0.8-V, 2% Internal Voltage Reference
  • Internal Soft-Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown
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Description

The LM2734Z regulator is a monolithic, high-frequency, PWM step-down DC–DC converter assembled in a thick 6-pin SOT and a WSON non-pullback 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 LM2734Z 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 3 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 85% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA. The LM2734Z 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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LM2734Z-Q1 ACTIVE 3 to 20 V input, 1 A, high frequency automotive step-down converter with light load efficiency Auto-qualified version

Technical documentation

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Type Title Date
* Datasheet LM2734Z/-Q1 Thin SOT 1-A Load Step-Down DC-DC Regulator datasheet (Rev. F) Jan. 06, 2016
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

The LM2734 demo board is configured to convert 5V input to 1.8V output at 1A load current using the LM2734X 1.6MHz or the LM2734Y 550kHz step down DC-DC regulator. The tiny low profile thin SOT23 package allows the demo board to be manufactured using less than 1 square inch of a 4-layer printed (...)

Features
  • Thin SOT23-6 package, or 6 lead LLP package
  • 3.0V to 20V input voltage range
  • 0.8V to 18V output voltage range
  • 1A output current
  • 3MHz switching frequency
  • 300mΩ NMOS switch
  • 30nA shutdonw current
  • 0.8V, 2% internal voltage reference
  • Internal soft-start
  • Current-Mode, PWM operation
  • Therman shutdown

Design tools & simulation

SIMULATION TOOLS 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 symbols

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

Ordering & quality

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