MIC2182

Micrel's MIC2182 is a synchronous buck (step-down) switching regulator controller. An all N-Channel synchronous architecture and powerful output drivers allow up to a 20A output current capabilty. The PWM and skip-mode control scheme allows efficiency to exceed 95% over a wide range of load current, making it ideal for battery powered applications, as well as high current distributed power supplies.

The MIC2182 operates from a 4.5V to 32V input and can operate with a maximum duty cycle of 86% for use in low-dropout conditions. It also features a shutdown mode that reduces quiescent current to 0.1µA.

The MIC2182 achieves high efficiency over a wide output current range by automatically switching between PWM and skip mode. Skip-mode operation enables the converter to maintain high efficiency at light loads by turning off circuitry pertaining to PWM operation, reducing the no-load supply current from 1.6mA to 600µA. The operating mode is internally selected according to the output load conditions. Skip mode can be defeated by pulling the PWM pin low which reduces noise and RF interference.

The MIC2182 is available in a 16-pin SOP (small-outline package) and SSOP (shrink small-outline package) with an operating range from -40°C to +85°C.

Features
  • 4.5V to 32V Input voltage range
  • 1.25V to 6V Output voltage range
  • 95% efficiency
  • 300kHz oscillator frequency
  • Current sense blanking
  • 5ω impedance MOSFET Drivers
  • Drives N-Channel MOSFETs
  • 600µA typical quiescent current (skip-mode)
  • Logic controlled micropower shutdown (IQ <0.1µA)
  • Current-mode control
  • Cycle-by-cycle current limiting
  • Built-in undervoltage protection
  • Adjustable undervoltage lockout
  • Easily synchronizable
  • Precision 1.245V reference output
  • 0.6% total regulation
  • 16-pin SOP and SSOP packages
  • Frequency foldback overcurrent protection
  • Sustained short-circuit protection at any input voltage
  • 20A output current capability
Parameter
Parameter Name Value Value
Supported Topologies Sync. Buck Sync. Buck
Supported Outputs 1 1
Minimum Input Voltage (V) 4.5 4.5
Maximum Input Voltage (V) 32 32
Minimum Output Voltage (V) 1.25 1.25
Maximum Output Voltage (V) 6 6
PFM, Discontinuous, Hyperlight load, or Skip Mode True True
Typical Tolerance (%) ±1 ±1
Duty Cycle Max (%) 0.86 0.86
Operating Frequency (Hz) 300K 300K
External Clock Sync True True
Soft Start True True
Internal Voltage Bias True True
Enable Pin True True
Current Limit / Short Circuit Protection True True
Input UVLO Typ (V) 2.5 2.5
Operating Supply Current (mA) 1.6 1.6
Iq Off (µA) 0.1 0.1
Package 16/SOP. 16/SSOP 16/SOP. 16/SSOP
Documents
MIC2182 - High-Efficiency Synchronous Buck ControllerData Sheets11/05/2015223KB
Micrel AN 34 - High-Efficiency Synchronous Buck ControllerAppNote10/01/2015240KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2182-3.3YM16SOIC-40C to +85CTUBE3.232.692.452.362.34
MIC2182YM16SOIC-40C to +85CTUBE3.232.692.452.362.34
MIC2182YM-TR16SOIC-40C to +85CT/R3.232.692.452.362.34
MIC2182YSM16SSOP-40C to +85CTUBE**********
MIC2182YSM-TR16SSOP-40C to +85CT/R3.372.812.552.472.44
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2182-3.3YM0.1574000.30000016SOIC.150inMatte Tine3
MIC2182-3.3YM-TR0.1574000.30769216SOIC.150inMatte Tine3
MIC2182-5.0YM0.1574000.30000016SOIC.150inMatte Tine3
MIC2182-5.0YM-TR0.1574000.30769216SOIC.150inMatte Tine3
MIC2182YM0.1574000.30000016SOIC.150inMatte Tine3
MIC2182YM-TR0.1574000.30769216SOIC.150inMatte Tine3
MIC2182YSM0.27350716SSOP5.3mmMatte Tine3
MIC2182YSM-TR0.81236816SSOP5.3mmMatte Tine3
MIC2182-3.3YSM0.27350716SSOP5.3mmMatte Tine3
MIC2182-3.3YSM-TR0.81236816SSOP5.3mmMatte Tine3
MIC2182-5.0YSM0.27350716SSOP5.3mmMatte Tine3
MIC2182-5.0YSM-TR0.81236816SSOP5.3mmMatte Tine3
MIC2182 - High-Efficiency Synchronous Buck Controller MIC2182
Micrel AN 34 MIC2182
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