MIC2169

The MIC2169 is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 package. The MIC2169 allows compact DC/DC solutions with a minimal external component count and cost.

The MIC2169 operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N-Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range.

The MIC2169 senses current across the high-side N-Channel MOSFET, eliminating the need for an expensive and lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing RDS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start.

The MIC2169 is available in a 10-pin MSOP package, with a wide junction operating range of -40°C to +125°C.

Features
  • 3V to 14.5V input voltage range
  • Adjustable output voltage down to 0.8V
  • Up to 95% efficiency
  • 500kHz PWM operation
  • Adjustable current limit senses high-side N-Channel MOSFET current
  • No external current-sense resistor
  • Adaptive gate drive increases efficiency
  • Fast transient response Externally compensated
  • Externally compensated
  • Overvoltage protection protects the load in fault conditions
  • Dual mode current limit speeds up recovery time
  • "Hiccup" mode short-circuit protection
  • Small size MSOP 10-lead package
Parameter
Parameter Name Value Value
Supported Topologies Sync. Buck Sync. Buck
Supported Outputs 1 1
Minimum Input Voltage (V) 3 3
Maximum Input Voltage (V) 14.5 14.5
Minimum Output Voltage (V) 0.8 0.8
Typical Tolerance (%) ±1 ±1
Duty Cycle Max (%) 0.92 0.92
Operating Frequency (Hz) 500K 500K
Soft Start True True
Internal Voltage Bias True True
Enable Pin True True
Current Limit / Short Circuit Protection True True
Operating Supply Current (mA) 1.5 1.5
Package 10/MSOP 10/MSOP
Documents
MIC2169 - 500kHz PWM Synchronous Buck Control ICData Sheets11/05/2015202KB
Micrel AN 106 - Type II Stability Program for the MIC2168/9AppNote10/02/2015163KB
Micrel AN 107 - Type III Stability Program for the MIC2168/9AppNote10/02/2015174KB
Micrel AN 44a - Type II Stability Program for the MIC2168/69AppNote11/12/2015163KB
Micrel AN 44b - Type III Stability Program for the MIC2168/69AppNote11/12/2015174KB
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2169YMM-TR0.0245000.43118010MSOP3x3x1.0mmNiPdAue4
MIC2169AYMM-TR0.0245000.43118010MSOP3x3x1.0mmNiPdAue4
MIC2169BYMM0.0245000.13560010MSOP3x3x1.0mmNiPdAue4
MIC2169AYMM0.0245000.13560010MSOP3x3x1.0mmNiPdAue4
MIC2169YMM0.0245000.13560010MSOP3x3x1.0mmNiPdAue4
MIC2169BYMM-TR0.0245000.43118010MSOP3x3x1.0mmNiPdAue4
MIC2169BYMME0.0248000.13560010MSOP3x3x1.0mmMatte Tine3
MIC2169BYMME-TR0.0248000.20614810MSOP3x3x1.0mmMatte Tine3
MIC2169 - 500kHz PWM Synchronous Buck Control IC MIC2169
Micrel AN 106 MIC2169
Micrel AN 107 MIC2169
Micrel AN 44a MIC2169
Micrel AN 44b MIC2169
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