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Datasheet Microchip MIC4574

ManufacturerMicrochip
SeriesMIC4574

The MIC4574 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators

Datasheets

  • Download » Datasheet PDF, 468 Kb, Revision: 11-05-2015
    MIC4574 Data Sheet
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    MIC4574 Micrel, Inc. MIC4574
    200kHz Simple 0.5A Buck Regulator General Description Features The MIC4574 is a series of easy to use fixed and adjustable
    BiCMOS step-down (buck) switch-mode voltage regulators.
    The 200kHz MIC4574 duplicates the pinout and function of
    the 52kHz LM2574. The higher switching frequency may
    allow up to a 2:1 reduction in output filter inductor size.
    The MIC4574 is available in 3.3V, and 5V fixed output
    versions or a 1.23V to 20V adjustable output version. Both
    versions are capable of driving a 0.5A load with excellent line
    and load regulation.
    The feedback voltage is guaranteed to В±2% tolerance for
    adjustable versions, and the output voltage is guaranteed to
    В±3% for fixed versions, within specified voltages and load
    conditions. The oscillator frequency is guaranteed to В±10%.
    In shutdown mode, the regulator draws less than 200ВµA
    standby current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault
    conditions.
    This series of simple switch-mode regulators requires a
    minimum number of external components and can operate
    using a standard series of inductors. Frequency compensation is provided internally. Fixed 200kHz operation 3.3V, 5V, and adjustable output versions Voltage over specified line and load conditions:
    Fixed version: В±3% max. output voltage
    Adjustable version: В±2% max. feedback voltage Guaranteed 0.5A switch current Wide 4V to 24V input voltage range Wide 1.23V to 20V output voltage range Requires minimum external components < 200ВµA typical shutdown mode 75% efficiency (adjustable version > 75% typ.) Standard inductors and capacitors are
    25% of typical LM2574 values Thermal shutdown Overcurrent protection 100% electrical thermal limit burn-in Applications Simple high-efficiency step-down (buck) regulator ...

Prices

Status

MIC4574-3.3YNMIC4574-5.0YNMIC4574YN
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)

Packaging

MIC4574-3.3YNMIC4574-5.0YNMIC4574YN
PackagePDIPPDIPPDIP
Pins888

Parametrics

MIC4574-3.3YNMIC4574-5.0YNMIC4574YN
# of Outputs111
Automotive RatedNoNoNo
Duty Cycle Max, %0.950.950.95
Input Voltage Range, V4 - 244 - 244 - 24
Light Load Efficiency ModeNoNoNo
Operating Temperature Range, °C-40 to +85-40 to +85-40 to +85
Output Current, mA) Max500500500
Output Voltage Range, V1.231.231.23
Quiescent Current, mA) type555
Regulator TypeStep Down (Buck)Step Down (Buck)Step Down (Buck)
SHUTDOWN Current, µA505050
Switching Frequency, kHz200200200
Synchronous RectifierNoNoNo
Vfb, V1.231.231.23

Eco Plan

MIC4574-3.3YNMIC4574-5.0YNMIC4574YN
RoHSCompliantCompliantCompliant

Moldel Line

Series: MIC4574 (3)

Manufacturer's Classification

  • Power Management > Switching Regulators > Step Down up to 36V

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