NCP1422: Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-Killer

NCP1422 is a monolithic micropower high frequency step-up switching converter IC specifically designed for battery-operated hand-held electronic products up to 800mA loading. It integrates Sync-Rect to improve efficiency and to eliminate the external Schottky Diode. High switching frequency (up to 1.2 MHz) allows for a low profile, small-sized inductor and output capacitor to be used. When the device is disabled, the internal conduction path from LX or BAT to OUT is fully blocked and the OUT pin is isolated from the battery. This True-Cutoff function reduce the shutdown current to typically only 50nA. Ring-Killer is also integrated to eliminate the high-frequency ringing in discontinuous conduction mode. In addition to the above, Low-Battery Detector, Logic-Controlled Shutdown, Cycle-by-Cycle Current Limit and Thermal Shutdown provide value-added features for various battery-operated applications. With all these functions ON, the quiescent supply current is typical only 8.5 uA. This device is available in compact and low profile DFN10 package.

Features
  • Output Current up to 800 mA at VIN = 2.5 V and VOUT = 3.3 V
  • High Switching Frequency, up to 1.2MHz
  • Anti-Ringing Ring-Killer for Discontinuous Conduction Mode
  • Low Quiescent Current of 8.5 µA
  • 1.0V Startup at No Load Guaranteed
  • Output Voltage from 1.5V to 5V Adjustable
  • 1.5A Cycle by Cycle Current Limit
  • On Chip Thermal Shutdown with Hysteresis
  • Housed in Space-Saving and Low Profile DFN10 package
  • Pb-Free Package is Available
Applications
  • Personal Digital Assistants (PDA)
  • Handheld Digital Audio Products
  • Camcorders and Digital Still Cameras
  • Conversion from one to two Alkaline, NiMH, NiCd battery cells to 3.0-5.0V or one Lithium-ion cells to 5.0V
  • While LED Flash for Digital Cameras
Application Notes (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1421/2 Reference Designs for High-Power White LED Flash ApplicationsAND8171/D (46.0kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-KillerNCP1422/D (134.0kB)3
Evaluation Board Documents (9)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1422GEVB Bill of Materials ROHS CompliantNCP1422GEVB_BOM_ROHS (70kB)1
NCP1422GEVB Gerber Layout Files (Zip Format)NCP1422GEVB_GERBER (45kB)0
NCP1422GEVB SchematicNCP1422GEVB_SCHEMATIC (46kB)0
NCP1422GEVB Test ProcedureNCP1422GEVB_TEST_PROCEDURE (128kB)0
NCP1422LEDGEVB Bill of Materials ROHS CompliantNCP1422LEDGEVB_BOM_ROHS.PDF (187.0kB)0
NCP1422LEDGEVB Gerber Layout Files (Zip Format)NCP1422LEDGEVB_GERBER.ZIP (43.0kB)0
NCP1422LEDGEVB ManualEVBUM2136/D (144.0kB)1
NCP1422LEDGEVB SchematicNCP1422LEDGEVB_SCHEMATIC.PDF (122.0kB)0
NCP1422LEDGEVB Test ProcedureNCP1422LEDGEVB_TEST_PROCEDURE.PDF (159.0kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
DFN10, 3x3, 0.5P485C (33.7kB)E
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1422GEVBActivePb-freeUp to 800 mA DC-DC Converter Evaluation Board
NCP1422LEDGEVBActivePb-freeHigh Current LED Driver Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1422MNR2GActivePb-free Halide freeDFN-10485C1Tape and Reel3000$0.7333
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP1422MNR2GStep-UpCurrent/Voltage Mode15.51.5 to 5.00.8Up to 94Up to 1200
Boost Converter, Sync-Rect, PFM, DC-DC, 800 mA, with True-Cutoff and Ring-Killer (134.0kB) NCP1422
NCP1421/2 Reference Designs for High-Power White LED Flash Applications NTJS3157N
NCP1422GEVB
NCP1422GEVB
NCP1422GEVB
NCP1422GEVB
NCP1422LEDGEVB BOM ROHS NCP1422LEDGEVB
NCP1422LEDGEVB GERBER NCP1422LEDGEVB
EVBUM2136/D - 144 NCP1422LEDGEVB
NCP1422LEDGEVB SCHEMATIC NCP1422LEDGEVB
NCP1422LEDGEVB TEST PROCEDURE NCP1422LEDGEVB
DFN10, 3x3, 0.5P NLAS4684