MIC28512

The MIC28512 is a synchronous step-down switching regulator with internal power switches capable of providing up to 2A output current from a wide input supply range from 4.6V to 70V. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%. A constant switching frequency can be programmed from 200kHz to 680kHz. The Hyper Speed Control™ and HyperLight Load® architectures of the MIC28512 allow for high VIN (low VOUT) operation and ultra-fast transient response while reducing the required output capacitance and providing very good light load efficiency.

The MIC28512 offers a full suite of protection features to ensure protections under fault conditions. These include under-voltage lockout to ensure proper operation under power sag conditions, internal soft-start to reduce inrush current, fold-back current limit, “hiccup” mode short-circuit protection, and thermal shutdown.

Features
  • 4.6V to 70V operating input voltage supply
  • Up to 2A output current
  • Integrated high-side and low-side N-channel MOSFETs
  • HyperLight Load® (MIC28512-1) and Hyper Speed Control™ (MIC28512-2) architecture
  • Enable input and power good (PGOOD) output
  • Programmable current limit and foldback "hiccup" mode short-circuit protection
  • Built-in 5V regulator for single-supply operation
  • Adjustable 200kHz to 680kHz switching frequency
  • Fixed 5ms soft-start
  • Internal compensation and thermal shutdown
  • Thermally enhanced 24-pin 3mm — 4mm FCQFN package
  • Junction temperature range of -40°C to +125°C
Parameter
Parameter Name Value Value
Regulator Type Step Down (Buck) Step Down (Buck)
# of Outputs 1 1
Input Voltage Range Min (V) 4.6 4.6
Input Voltage Range Max (V) 70 70
Output Voltage Range Min (V) 0.8 0.8
Output Voltage Range Max (V) 24 24
Output Current (A) max 2 2
Quiescent Current (mA) typ 0.4 0.4
Synchronous Rectifier Yes Yes
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.8 0.8
Duty Cycle Max (%) 0.85 0.85
SHUTDOWN Current (µA) (Typ) 0.1 0.1
Light Load Efficiency Mode Yes Yes
Documents
MIC28512 - 70V 2A Synchronous Buck RegulatorData Sheets05/11/20163700KB
Micrel AN 87 - Putting Adaptive Constant-ON-Time Buck ICs and Modules to Work in Inverting Buck-Boost ConvertersAppNote10/02/2015509KB
Micrel ANLPS207 - Putting Adaptive Constant-On-Time Buck ICs and Modules to Work in Inverting Buck-Boost ConvertersAppNote11/16/2015509KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC28512-1YFL-T524VQFN-40C to +125CT/R2.622.191.991.921.90
MIC28512-1YFL-TR24VQFN-40C to +125CT/R2.622.191.991.921.90
MIC28512-2YFL-T524VQFN-40C to +125CT/R2.622.191.991.921.90
MIC28512-2YFL-TR24VQFN-40C to +125CT/R2.622.191.991.921.90
相关开发工具
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC28512-1YFL-TR0.80490024VQFN3x4x0.9mmNiPdAue4
MIC28512-2YFL-T50.80490024VQFN3x4x0.9mmNiPdAue4
MIC28512-2YFL-TR0.80490024VQFN3x4x0.9mmNiPdAue4
MIC28512-1YFL-T50.80490024VQFN3x4x0.9mmNiPdAue4
MIC28512 - 70V 2A Synchronous Buck Regulator MIC28512
Micrel AN 87 MIC2104
Micrel ANLPS207 MIC2104
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