MIC3808

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 single-ended 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 130µA 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 operating range of -40°C to +85°C.

产品特性
  • Dual output drive stages in push-pull configuration
  • Leading edge current-sense blanking
  • 130µA typical start-up current
  • 1mA typical run current
  • Operation to 1MHz
  • Internal soft start
  • On-chip error amplifier with 4MHz gain bandwidth product
  • On-chip VDD clamping
  • Output drive stages capable of 500mA peak source current, 1A peak sink current
技术参数
Parameter Name Value Value
Supported Topologies Push-Pull, Half Bridge, Full Bridge Push-Pull, Half Bridge, Full Bridge
Supported Outputs 1 1
Minimum Input Voltage (V) 8.3 8.3
Maximum Input Voltage (V) 15 15
Duty Cycle Max (%) 0.49 0.49
Operating Frequency (Hz) Adj. to 1M Adj. to 1M
Soft Start True True
Internal Voltage Bias True True
Current Limit / Short Circuit Protection True True
Input UVLO Typ (V) 12.5 12.5
Operating Supply Current (mA) 1 1
Package 8/SOP, 8/MSOP 8/SOP, 8/MSOP
文档资料
MIC3808/3809 - Push-Pull PWM ControllerData Sheets11/09/2015145KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC3808YM8SOIC-40C to +85CTUBE**********
MIC3808YM-TR8SOIC-40C to +85CT/R1.721.431.301.081.00
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC3808YM0.0750000.1632658SOIC3.90mm(.150in)NiPdAue4
MIC3808YM-TR0.0750000.2500008SOIC3.90mm(.150in)NiPdAue4
MIC3808YMM0.0251000.1246008MSOP3x3x1.0mmNiPdAue4
MIC3808YMM-TR0.0251000.3347008MSOP3x3x1.0mmNiPdAue4
MIC3808/3809 - Push-Pull PWM Controller MIC3809
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