Datasheet Microchip MIC3809 The MIC3808 and MIC3809 are a family of complementary output push-pull PWM control ICs that feature high speed and low power consumption Datasheets- Download » Datasheet, PDF, 149 Kb, Revision: 11-09-2015
MIC3808/3809 - Push-Pull PWM Controller
Docket ↓MIC3808/3809 Micrel MIC3808/3809
Push-Pull PWM Controller General Description Features The MIC3808 and MIC3809 are a family of complementary
output push-pull PWM control ICs that feature high speed and
low power consumption. The MIC3808/9 are ideal for telecom
level (36V to 75V) isolated step down dc/dc conversion
applications where high output current, small size, and high
efficiency are required.
The dual-ended push-pull architecture of the MIC3808/9
allows more efficient utilization of the transformer than singleended topologies, allowing smaller size dc/dc solutions.
Additionally, the out-of-phase push-pull topology allows a
higher effective duty cycle, reducing input and output ripple
as well as stress on the external components. The dead-time
between the two outputs is adjustable between 60ns to
200ns, limiting the duty cycle of each output stage to less than
50%.
The MIC3808/9 are built on a low-power, high-speed BiCMOS
process. The 130ВµA start-up current and 1mA run-current
reduce the size of the start-up circuitry and allow high
efficiency even at light loads. The high-speed internal 4MHz
error amplifier allows MIC3808/9 operation up to 1MHz.
The MIC3808 has a turn-on threshold of 12.5V whereas the
MIC3809 has a lower turn-on threshold of 4.3V. Both devices
are available in SOP-8 and MSOP-8 package options with an ...
PricesStatus | MIC3809YM | MIC3809YM-TR | MIC3809YMM | MIC3809YMM-TR |
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| 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) |
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PackagingParametrics | MIC3809YM | MIC3809YM-TR | MIC3809YMM | MIC3809YMM-TR |
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| Current Limit / Short Circuit Protection | True | True | True | True |
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| Duty Cycle Max, % | 0.49 | 0.49 | 0.49 | 0.49 |
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| Input UVLO Typ, V | 4.3 | 4.3 | 4.3 | 4.3 |
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| Internal Voltage Bias | True | True | True | True |
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| Maximum Input Voltage, V | 15 | 15 | 15 | 15 |
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| Minimum Input Voltage, V | 4.1 | 4.1 | 4.1 | 4.1 |
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| Operating Frequency, Hz | Adj. to 1M | Adj. to 1M | Adj. to 1M | Adj. to 1M |
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| Operating Supply Current, mA | 1 | 1 | 1 | 1 |
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| Operating Temperature Range, °C | -40 to +85 | -40 to +85 | -40 to +85 | -40 to +85 |
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| Soft Start | True | True | True | True |
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| Supported Outputs | 1 | 1 | 1 | 1 |
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| Supported Topologies | Push-Pull, Half Bridge, Full Bridge | Push-Pull, Half Bridge, Full Bridge | Push-Pull, Half Bridge, Full Bridge | Push-Pull, Half Bridge, Full Bridge |
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Eco PlanOther OptionsMIC3808 Moldel LineSeries: MIC3809 (4) Manufacturer's Classification- Power Management > PWM Controllers > Flyback/Fwd/Push-Pull Products
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