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Datasheet Microchip LM2574

ManufacturerMicrochip
SeriesLM2574

The LM2574 family is a series of easy to use fixed and adjustable switching voltage regulators

Datasheets

  • Download » Datasheet, PDF, 191 Kb, Revision: 11-05-2015
    LM2574 - 52 kHz Simple 0.5A Buck Regulator
    Docket ↓
    LM2574 Micrel, Inc. LM2574
    52kHz Simple 0.5A Buck Regulator General Description Features The LM2574 family is a series of easy to use fixed and adjustable switching voltage regulators. The LM2574 contains
    all of the active circuitry necessary to construct a stepdown
    (buck) switching regulator and requires a minimum of external
    components.
    The LM2574 is available in 3.3V and 5V fixed output versions, or an adjustable version with an output voltage range
    of 1.23V to 37V. Output voltage is guaranteed to ±4% for
    specified input and load conditions.
    The LM2574 can supply 0.5A while maintaining excellent
    line and load regulation. The output switch includes cycleby-cycle current limiting, as well as thermal shutdown for full
    protection under fault conditions.
    An external shutdown connection selects operating or standby
    modes. Standby current is less than 200µA.
    Heat sinks are generally unnecessary due the regulator’s
    high efficiency. Adequate heat transfer is usually provided
    by soldering all package pins to a printed circuit board.
    The LM2574 includes internal frequency compensation and
    an internal 52kHz fixed frequency oscillator guaranteed to
    ±10% of the frequency.
    Circuits constructed around the LM2574 use a standard
    series of inductors which are available from several different
    manufacturers.
    All support documentation can be found on Micrel’s web site ...

Prices

Status

LM2574-12YNLM2574-3.3YNLM2574-5.0YNLM2574YN
Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)

Packaging

LM2574-12YNLM2574-3.3YNLM2574-5.0YNLM2574YN
PackagePDIPPDIPPDIPPDIP
Pins8888

Parametrics

LM2574-12YNLM2574-3.3YNLM2574-5.0YNLM2574YN
# of Outputs1111
Automotive RatedNoNoNoNo
Duty Cycle Max, %0.980.980.980.98
Input Voltage Range, V4 - 404 - 404 - 404 - 40
Light Load Efficiency ModeNoNoNoNo
Operating Temperature Range, °C-40 to +85-40 to +85-40 to +85-40 to +85
Output Current, mA) Max500500500500
Output Voltage Range, V1.231.231.231.23
Quiescent Current, mA) type5555
Regulator TypeStep Down (Buck)Step Down (Buck)Step Down (Buck)Step Down (Buck)
SHUTDOWN Current, µA50505050
Switching Frequency, kHz52525252
Synchronous RectifierNoNoNoNo
Vfb, V1.231.231.231.23

Eco Plan

LM2574-12YNLM2574-3.3YNLM2574-5.0YNLM2574YN
RoHSCompliantCompliantCompliantCompliant

Moldel Line

Series: LM2574 (4)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Down up to 75V

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