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MIC3809

Push-Pull DC/DC Controller w/Turn On Threshold of 4.3V

Status: In Production

Features:

  • 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
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

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.

Additional Features
    • 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
Parametrics
Name
Value
Supported Topologies
Push-Pull, Half Bridge, Full Bridge
Supported Outputs
1
Minimum Input Voltage (V)
4.1
Maximum Input Voltage (V)
15
Duty Cycle Max (%)
0.49
Operating Frequency (Hz)
Adj. to 1M
Soft Start
True
Internal Voltage Bias
True
Current Limit / Short Circuit Protection
True
Input UVLO Typ (V)
4.3
Operating Supply Current (mA)
1
Package
8/SOP, 8/MSOP

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC3809YMM
0.025100
0.124600
8
MSOP
3x3mm
NiPdAu
e4
MIC3809YMM-TR
0.025100
0.334700
8
MSOP
3x3mm
NiPdAu
e4
MIC3809YM-TR
0.075000
0.250000
8
SOIC
3.90mm(.150in)
NiPdAu
e4
MIC3809YM
0.075000
0.163265
8
SOIC
3.90mm(.150in)
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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