LM78S40N/NOPB by Texas Instruments | DC to DC Converters | Avnet ASIA
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LM78S40N/NOPB

Texas Instruments

Conv DC-DC Single Step Down 2.5V to 40V 16-Pin PDIP Rail

Manufacturer Part #: LM78S40N/NOPB

Alternate Part #: LM78S40N/NOPB


RoHS Compliant

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Information

The LM78S40 is a monolithic regulator subsystem consisting of all the active building blocks necessary for switching regulator systems. The device consists of a temperature compensated voltage reference, a duty-cycle controllable oscillator with an active current limit circuit, an error amplifier, high current, high voltage output switch, a power diode and an uncommitted operational amplifier. The device can drive external NPN or PNP transistors when currents in excess of 1.5A or voltages in excess of 40V are required. The device can be used for step-down, step-up or inverting switching regulators as well as for series pass regulators. It features wide supply voltage range, low standby power dissipation, high efficiency and low drift. It is useful for any stand-alone, low part count switching system and works extremely well in battery operated systems.

 

Key Features

  • Step-up, step-down or inverting switching regulators
  • Output adjustable from 1.25V to 40V
  • Peak currents to 1.5A without external transistors
  • Operation from 2.5V to 40V input
  • Low standby current drain
  • 80 dB line and load regulation
  • High gain, high current, independent op amp
  • Pulse width modulation with no double pulsing
  • Technical Attributes

    Description
    Value
    Find similar Parts
    Operating Temperature
    -40 to 125 °C
    Maximum Input Voltage
    40 V
    Number of Outputs
    1
    Line Regulation
    0.2 mV/V
    Switching Frequency
    0.1 to 100 kHz
    Max Processing Temp
    260|265
    Switching Regulator
    Yes
    Supplier Package
    PDIP
    Mounting
    Through Hole
    Output Voltage
    1.25 to 40 V
    Type
    Step Down
    Maximum Output Current
    1.5 A
    Load Regulation
    0.5 mV/mA
    Lead Finish
    Matte Tin
    Pin Count
    16
    MSL Level
    1
    Output Type
    Adjustable
    Product Dimensions
    19.05 x 6.35 x 3.3 mm
    Minimum Input Voltage
    2.5 V

    ECCN / UNSPSC

    Description
    Value
    ECCN:
    EAR99
    SCHEDULE B:
    8542390000

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