NCP3066: Buck / Boost / Inverting Regulator, Switching, Constant Current, 1.5 A, for HB-LEDs with Enable

The NCP3066 is a monolithic Buck Boost Inverting Switching Regulator designed to deliver constant current for powering high brightness LEDs. The device has a very low feedback voltage of 235 mV (nominal) which is used to regulate the average current of the LED string. In addition, the NCP3066 has a wide input voltage up to 40 V to allow it to operate from 12 Vac or 12 Vdc supply, commonly used for lighting applications as well as unregulated supplies such as rechargeable batteries. The NCP3066 switching regulator can be configured in Step-Down (Buck) and Step-Up (Boost) and Voltage-Inverting topologies with a minimum number of external components. An NCV3066 automotive version is available and without the ON/OFF feature as the NCP3065.

Features
  • Integrated 1.5 A Switch
  • Input Voltage Range from 3 V to 40 V
  • Low Feedback Voltage of 235 mV
  • Cycle-by-Cycle Current Limit
  • No Control Loop Compensation Required
  • Frequency of Operation Adjustable up to 250 kHz
  • Operation With All Ceramic Output Capacitors or No Output Capacitance
  • Internal Thermal Shutdown with Hysteresis
  • ON/OFF pin for direct PWM dimming
  • ON/OFF pin disabling the regulator
Benefits
  • Integrated switch provides for small footprint
  • Flexibility to operate from 12Vac or 12Vdc supplies commonly used for lighting applications
  • Allows the use of small / low cost sense resistor
  • Enhanced protection features
  • Easy design-in
  • Optimization of efficiency and size
  • Reduce size and cost by eliminating output capacitor
  • Enhanced protection features
  • Provides dimming up to 1kHz frequency
  • Low power standby (<100µA)
Applications
  • Constant Current Source
  • High Power LED Driver
  • High Brightness LED (HBLED)
End Products
  • MR-16 Replacement
  • Automotive LED Headlight
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP3066 Design WorksheetNCP3066 DWS.XLS (133.0kB)0
Package Drawings (3)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
8 PIN DFN, 4x4488AF (61.3kB)C
SOIC-8 Narrow Body751-07 (62.6kB)AK
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
1.5 A Constant Current Buck Boost Inverting Switching Regulator for HB-LEDs with EnableNCP3066/D (1139.0kB)3
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP3066DR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.47
NCP3066MNTXGActivePb-free Halide freeDFN-8488AF1Tape and Reel4000$0.49
NCP3066PGLast ShipmentsPb-free Halide freePDIP-8626-05NATube50
NCV3066DR2GActiveAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tape and Reel2500$0.5
NCV3066MNTXGActiveAEC Qualified PPAP Capable Pb-free Halide freeDFN-8488AF1Tape and Reel4000$0.52
NCV3066PGLast ShipmentsAEC Qualified PPAP Capable Pb-free Halide freePDIP-8626-05NATube50
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP3066DR2G Design itStep-Up Step-Down Step-Up/Step-DownHysteretic3401.25 to 401.585250
NCP3066MNTXG Design itStep-Down Step-Up/Step-Down Step-UpHysteretic3401.25 to 401.585250
NCV3066DR2G Design itStep-Down Step-Up Step-Up/Step-DownHysteretic3401.25 to 401.585Up to 300
NCV3066MNTXG Design itStep-Up Step-Up/Step-Down Step-DownHysteretic3401.25 to 401.585Up to 300
1.5 A Constant Current Buck Boost Inverting Switching Regulator for HB-LEDs with Enable (1139.0kB) NCP3066
NCP3066 Design Worksheet NCP3066
SOIC-8 Narrow Body CM1216
8 PIN DFN, 4x4 NCP43080
8 LEAD PDIP NE592
NCP3066