NCP1423: Boost Converter, Sync-Rect, PFM, DC-DC, 400 mA, with True-Cutoff and Ring-Killer

NCP1423 is a monolithic micropower high frequency step-up switching converter IC specially designed for battery operated hand-held electronic products up to 400mA loading. It integrates Synchronous Rectifier for improving efficiency as well as eliminating the external Schottky Diode. High switching frequency (up to 600 KHz) allows low profile inductor and output capacitor being used. When the IC is disabled, internal conduction path from LX or BAT to OUT is blocked, OUT pin is isolated from the battery. This achieves True-Cutoff. Ring-Killer is also integrated to eliminate the high frequency ringing in discontinuous conduction mode. Low-Battery Detector, Cycle-by-Cycle Current Limit, Overvoltage-Protection and Thermal Shutdown provide value-added features for various battery operated application. With all these functions ON, the quiescent supply current is only 9.0uA. This device is available in compact Micro-10 package

Features
  • High Switching Frequency, up to 600 kHz
  • Low Quiescent Current of 9.0 uA
  • Low Battery Detector
  • 0.8 V Startup at No Load Guaranteed
  • Ring-Killer for Discontinuous Conduction Mode
  • Thermal Shutdown
  • 1.2 A Cycle by Cycle Current Limit
  • Output Current up to 400 mA @ VOUT = 3.3 V, 200 mA @ VOUT = 1.8 V
  • Overvoltage Protection
  • Low Profile and Minimum External Part
  • Open Drain Low-Battery Detector Output
  • Compact Micro-10 Package
  • Pb-Free Package is Available
Applications
  • Wireless Optical Mouse
  • Wireless Headsets
  • Internet Audio Players
  • Personal Digital Assistants (PDAs)
  • Handheld Instruments
  • Conversion from one/two NiMH or NiCd cells to 1.8 V / 3.3 V
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Boost Converter, Sync-Rect, PFM, DC-DC, 400 mA, with True-Cutoff and Ring-KillerNCP1423/D (178kB)8
Package Drawings (1)
Document TitleDocument ID/SizeRevision
C/O FOR MICRO 10 PKG846B (30.6kB)D
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1423EVB Bill of MaterialsNCP1423EVB_BOM.PDF (70.0kB)2
NCP1423EVB Gerber Layout Files (Zip Format)NCP1423EVB_GERBER.ZIP (97.0kB)1
NCP1423EVB SchematicNCP1423EVB_SCHEMATIC.PDF (54.0kB)2
NCP1423EVB Test ProcedureNCP1423EVB_TEST_PROCEDURE.PDF (70.0kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1423EVBActive400 mA DC-DC Converter Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1423DMR2GActivePb-free Halide freeMicro10846B1Tape and Reel4000$0.7333
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP1423DMR2GStep-UpCurrent/Voltage Mode0.861.8 to 3.30.492Up to 600
Boost Converter, Sync-Rect, PFM, DC-DC, 400 mA, with True-Cutoff and Ring-Killer (178kB) NCP1423
NCP1423EVB BOM NCP1423EVB
NCP1423EVB GERBER NCP1423EVB
NCP1423EVB SCHEMATIC NCP1423EVB
NCP1423EVB TEST PROCEDURE NCP1423EVB
C/O FOR MICRO 10 PKG NLAS4717