MCP1661

The MCP1661 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DCconverter which integrates a 36V, 800 mΩ NMOS switch. It provides a space-efficient high-voltage step-up power supply solution for applications powered by either two-cell or three-cell alkaline, Lithium, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries.

Features
  • Up to 92% Efficiency
  • High Output Voltage Range: up to 32V
  • 1.3A Peak Input Current Limit: IOUT> 200 mA @ 5.0V VIN, 12V VOUT IOUT> 125 mA @ 3.3V VIN, 12V VOUT IOUT> 100 mA @ 4.2V VIN, 24V VOUT
  • IOUT> 200 mA @ 5.0V VIN, 12V VOUT
  • IOUT> 125 mA @ 3.3V VIN, 12V VOUT
  • IOUT> 100 mA @ 4.2V VIN, 24V VOUT
  • Input Voltage Range: 2.4V to 5.5V
  • Undervoltage Lockout (UVLO): UVLO@VIN Rising:  2.3V, typical UVLO@VIN Falling: 1.85, typical
  • UVLO@VIN Rising:  2.3V, typical
  • UVLO@VIN Falling: 1.85, typical
  • No Load Input Current: 250 µA, typical
  • Sleep mode with 200 nA Typical Quiescent Current
  • PWM Operation with Skip mode: 500 kHz
  • Feedback Voltage Reference: VFB= 1.227V
  • Cycle-by-Cycle Current Limiting
  • Internal Compensation
  • Inrush Current Limiting and Internal Soft-Start
  • Output Overvoltage Protection (OVP) in the event of: Feedback pin shorted to GND Disconnected feedback divider
  • Feedback pin shorted to GND
  • Disconnected feedback divider
  • Overtemperature Protection
  • Easily Configurable for SEPIC or Flyback Topologies
  • Available Packages: 5-Lead SOT-23 or 2x3 8-Lead TDFN
Parameter
Parameter Name Value Value
Regulator Type Step Up (Boost) Step Up (Boost)
Input Voltage Range Min (V) 2.4 2.4
Input Voltage Range Max (V) 5.5 5.5
Output Voltage Range Max (V) 32 32
Quiescent Current (mA) typ 0.25 0.25
Switching Frequency (kHz) 500 500
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 1.227 1.227
Duty Cycle Max (%) 90 90
SHUTDOWN Current (µA) (Typ) 0.2 0.2
Switch current (A) typ 1.3 1.3
Alternative Topology SEPIC, Flyback SEPIC, Flyback
Documents
MCP1661 Data SheetData Sheets02/27/20151202KB
MCP1661 High-Voltage Boost and SEPIC Converters Evaluation Board User's GuideUser Guides07/01/2014595KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MCP1661T-E/MNY8TDFN-40C to +125CT/R0.930.780.710.680.67
MCP1661T-E/OT5SOT-23-40C to +125CT/R0.930.780.710.680.67
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MCP1661T-E/OT0.0160000.0490005SOT-23-Matte Tine3
MCP1661T-E/MNY0.0143000.2484858TDFN2x3x0.8mmNiPdAue4
MCP1661 Data Sheet MCP1661
MCP1661 High-Voltage Boost and SEPIC Converters Evaluation Board User's Guide MCP1661