MIC2169B

The MIC2169B is a high-efficiency, simple to use 500kHz PWM synchronous buck control IC housed in a small MSOP-10 ePad package. It allows compact DC/DC solutions with a minimal external component count and cost. The device features high output driver capability to drive loads up to 30A.

The MIC2169B 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 within the smallest possible printed circuit board space area.

The MIC2169B 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 MIC2169B is identical to the MIC2169A except it supports pre-bias loads. Internal pre-bias circuit prevents output voltage drooping and excessive reverse inductor current when powering up with a pre-bias voltage at the output.

The MIC2169B is available in a 10-pin MSOP and a thermally-capable 10-pin ePad 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
  • 500kHz PWM operation
  • Up to 95% efficiency
  • Output pre-biased protection
  • Built-in 2.2ω drivers to drive two N-Channel MOSFETs
  • Adaptive gate drive increases efficiency
  • Simple, externally-compensated voltage-mode PWM control
  • Short minimum ON time of 30ns allowing very low duty cycle
  • Fast transient response
  • Adjustable current limit senses high-side N-Channel MOSFET current
  • Hiccup mode short-circuit protection
  • No external current-sense resistor
  • Internal soft-start current source
  • Dual function COMP and EN pin allows low-power shutdown
  • Available in a small size 10-pin MSOP and 10-pin MSOP ePad 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
Iq Off (µA) 50 50
Package 10/MSOP 10/MSOP
Documents
MIC2169B - 500kHz PWM Synchronous Buck Control ICData Sheets11/05/2015520KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2169BYMM-TR10MSOP-40C to +125CT/R1.851.541.401.351.34
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2169BYMM0.0245000.13560010MSOP3x3x1.0mmNiPdAue4
MIC2169BYMM-TR0.0245000.43118010MSOP3x3x1.0mmNiPdAue4
MIC2169BYMME0.0248000.13560010MSOP3x3x1.0mmMatte Tine3
MIC2169BYMME-TR0.0248000.20614810MSOP3x3x1.0mmMatte Tine3
MIC2169B - 500kHz PWM Synchronous Buck Control IC MIC2169B
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