Datasheet Microchip MIC2184
MIC2184 is a high efficiency PWM buck control IC
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MIC2184 - Low Voltage Buck PWM Control IC
MIC2184 Micrel, Inc. MIC2184
Low Voltage Buck PWM Control IC General Description Features Micrelâ€™s MIC2184 is a high efficiency PWM buck control IC.
With its wide input voltage range of 2.9V to 14V, the MIC2184
can be used to efficiently step voltages down in 1-or 2-cell Li
Ion battery powered applications, as well as in fixed 3.3V, 5V,
or 12V systems.
Efficiencies over 90% are achievable over a wide range of
load conditions with the MIC2184â€™s PWM control scheme.
The operating frequency can be divided by two by raising the
FREQ/2 pin to VDD. This allows the user to optimize efficiency
versus board space. It also allows the MIC2184 to be externally synchronized to frequencies below its nominal 400KHz.
The MIC2184 features an oscillator output, FreqOut, which
can be used to implement a simple charge pump in low
voltage applications. The output of the charge pump can be
fed into the gate drive power circuitry via the VINP pin,
allowing enhanced gate drive, hence higher efficiencies,
despite low input voltages.
MIC2184 features a 1ÂµA shutdown mode, and a programmable undervoltage lockout, making it well suited for portable
The MIC2184 is available in 16 pin SOP and QSOP package
options with a junction temperture range range from â€“40Â°C
to +125Â°C. Input voltage range: 2.9V to 14V
>90% efficiency ...
|Lifecycle Status||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)||Production (Appropriate for new designs but newer alternatives may exist)|
|Current Limit / Short Circuit Protection||True||True||True||True|
|Duty Cycle Max, %||1||1||1||1|
|External Clock Sync||True||True||True||True|
|Internal Voltage Bias||True||True||True||True|
|Iq Off, µA||0.5||0.5||0.5||0.5|
|Maximum Input Voltage, V||14||14||14||14|
|Maximum Output Voltage, V||12||12||12||12|
|Minimum Input Voltage, V||2.9||2.9||2.9||2.9|
|Minimum Output Voltage, V||1.3||1.3||1.3||1.3|
|Operating Frequency, Hz||200K / 400K||200K / 400K||200K / 400K||200K / 400K|
|Operating Supply Current, mA||1.7||1.7||1.7||1.7|
|Operating Temperature Range, °C||-40 to +125||-40 to +125||-40 to +125||-40 to +125|
|Supported Topologies||Async. Buck||Async. Buck||Async. Buck||Async. Buck|
|Typical Tolerance, %||Â±1||Â±1||Â±1||Â±1|
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