Electronics ru
Advanced Search +

Datasheet Microchip MIC2178-3.3YWM-TR

Part NumberMIC2178-3.3YWM-TR

The MIC2178 is a 200kHz synchronous buck (step-down) switching regulator designed for high-efficiency, battery-powered applications


  • Download » Datasheet PDF, 178 Kb, Revision: 11-05-2015
    MIC2178 - 2.5A Synchronous Buck Regulator
    Docket ↓
    MIC2178 Micrel, Inc. MIC2178
    2.5A Synchronous Buck Regulator General Description Features The Micrel MIC2178 is a 200kHz synchronous buck (stepdown) switching regulator designed for high-efficiency, battery-powered applications.
    The MIC2178 operates from a 4.5V to 16.5V input and
    features internal power MOSFETs that can supply up to 2.5A
    output current. It can operate with a maximum duty cycle of
    100% for use in low-dropout conditions. It also features a
    shutdown mode that reduces quiescent current to less than
    The MIC2178 achieves high efficiency over a wide output
    current range by operating in either PWM or skip mode. The
    operating mode is externally selected, typically by an intelligent system, which chooses the appropriate mode according
    to operating conditions, efficiency, and noise requirements.
    The switching frequency is preset to 200kHz and can be
    synchronized to an external clock signal of up to 300kHz.
    The MIC2178 uses current-mode control with internal current
    sensing. Current-mode control provides superior line regulation and makes the regulator control loop easy to compensate. The output is protected with pulse-by-pulse current
    limiting and thermal shutdown. Undervoltage lockout turns
    the output off when the input voltage is less than 4.5V.
    The MIC2178 and is packaged in a 20-lead wide power SOIC
    package with an operating temperature range of –40°C to
    See the MIC2177 for automatic selection of PWM or skipmode operation. 4.5V to 16.5V input voltage range Dual-mode operation for high efficiency (up to 96%)
    PWM mode for > 200mA load current ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)




# of Outputs1
Automotive RatedNo
Duty Cycle Max1 %
Input Voltage Range4.5 - 16.5 V
Light Load Efficiency ModeYes
Operating Temperature Range-40 to +85 °C
Output Current2500 mA) Max
Output Voltage Range1.245 - 16.5 V
Quiescent Current0.6 mA) type
Regulator TypeStep Down (Buck)
SHUTDOWN Current1 µA
Switching Frequency200 kHz
Synchronous RectifierYes
Vfb1.245 V

Eco Plan


Moldel Line

Series: MIC2178 (6)

Manufacturer's Classification

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

Other Names:

MIC21783.3YWMTR, MIC2178 3.3YWM TR

Slices ↓
Radiolocman facebook Radiolocman twitter Radiolocman google plus