LM22680MRX-ADJ/NOPB by Texas Instruments | DC to DC Converter | Avnet ASIA
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LM22680MRX-ADJ/NOPB

Texas Instruments

Conv DC-DC Single Step Down 4.5V to 42V 8-Pin PSOP EP T/R

Manufacturer Part #: LM22680MRX-ADJ/NOPB

Alternate Part #: LM22680MRX-ADJ/NOPB


legend RoHS Compliant

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The LM22680 switching regulator provides all of the functions necessary to implement an efficient high-oltage step-down (buck) regulator using a minimum of external components. This easy to use regulator incorporates a 42-V N-channel MOSFET switch that can provide up to 2 A of load current. Excellent line and load regulation along with high efficiency (> 90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop compensation means that the user is free from the tedious task of calculating the loop compensation components. Fixed 5-V output and adjustable output voltage options are available. The default switching frequency is set at 500 kHz, thus allowing for small external components and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz to 1 MHz with a single external resistor. The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable input allows simplification of regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typical). An adjustable soft-start feature is provided through the selection of a single external capacitor. The LM22680 device also has built-in thermal shutdown, and current limiting to protect against accidental overloads.

The LM22680 device is a member of Texas Instruments’ SIMPLE SWITCHER® family. The SIMPLE SWITCHER concept provides for an easy-to-use complete design using a minimum number of external components and the TI WEBENCH design tool. TI’s WEBENCH tool includes features such as external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy design-in.

Key Features

  • Wide Input Voltage Range: 4.5 V to 42 V
  • Internally Compensated Voltage Mode Control
  • Stable with Low ESR Ceramic Capacitors
  • 200-mΩ N-Channel MOSFET
  • Output Voltage Option:
    -ADJ (Outputs as Low as 1.285 V)
  • ±1.5% Feedback Reference Accuracy
  • 500-kHz Default Switching Frequency
  • Adjustable Switching Frequency and
    Synchronization
  • –40°C to 125°C Operating Junction Temperature
    Range
  • Precision Enable Pin
  • Integrated Boot-Strap Diode
  • Adjustable Soft-Start
  • Fully WEBENCH® Enabled
  • LM22680-Q1 is an Automotive-Grade Product
    that is AEC-Q100 Grade 1 Qualified (–40°C to
    +125°C Operating Junction Temperature)
  • SO PowerPAD™ (Exposed Pad)
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Operating Supply Voltage
    4.5 to 42 V
    Switching Regulator
    Yes
    Max Processing Temp
    260
    Supplier Package
    PSOP EP
    Switching Frequency
    500 kHz
    Type
    Step Down
    Output Voltage
    1.285 V
    Minimum Input Voltage
    4.5 V
    Pin Count
    8
    Lead Finish
    Matte Tin
    Product Dimensions
    4.9 x 3.9 x 1.47 mm
    Mounting
    Surface Mount
    Maximum Output Current
    2 A
    Output Type
    Adjustable
    MSL Level
    3
    Number of Outputs
    1
    Efficiency
    89 %
    Maximum Input Voltage
    42 V
    Operating Temperature
    -40 to 125 °C

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542390000"
    UNSPSC:
    32101600
    UNSPSC VERSION:
    V15.1101

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