NCP1529: Buck Converter, DC-DC, High Efficiency, Adjustable Output Voltage, Low Ripple, 1.7 MHz, 1 A

The NCP1529 step-down DC-DC converter is a monolithic integrated circuit for portable applications powered from one cell Li-ion or three cell Alkaline/NiCd/NiMH batteries. The device is able to deliver up to 1.0 A on an output range externally adjustable from 0.9 V to 3.9 V or fixed at 1.2 V or 1.35 V.It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built-in 1.7 MHz (nominal) oscillator which reduces component size by allowing a small inductor and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. Additional features include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection. The NCP1529 is available in a space saving, low profile 2x2x0.5 mm UDFN6 package and TSOP-5 package.

Features
  • 96% efficiency, 28 uA quiescent current, 0.3 uA shutdown current
  • 1.7 MHz switching frequency
  • Auto-switching between PWM and PFM mode at light load conditions
  • Adjustable output voltage from 0.9V to 3.9V
  • Best in class Low Ripple even in PFM mode
Benefits
  • Extends battery life and 'play-time'
  • Allows use of smaller inductor and capacitor
  • Low power consumption at light loading
Applications
  • Battery powered applications power management
  • Power supply for processor with low core voltage
  • USB powered devices
  • Low Voltage DC rails power management
End Products
  • Cellular phones, smart phones, and PDAs
  • MP3 players and portable audio systems
Application Notes (3)
Document TitleDocument ID/SizeRevisionRevision Date
How to Prevent Thermal Issues with High Output Current DC to DC ConvertersAND8338/D (97kB)1Dec, 2016
Make a White-LED Torch Using a Buck ConverterAND8465/D (451.0kB)2
Use of NCP1529 Pspice ModelAND9004/D (457.0kB)0
Simulation Models (1)
Document TitleDocument ID/SizeRevisionRevision Date
Pspice Model of NCP1529NCP1529_PSPICE (18.0kB)0
Evaluation Board Documents (9)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1529 Series 1.7 MHz, 1 A, High Efficiency, Low Ripple, Adjustable Output Voltage Step-down Converter Evaluation Board User's ManualEVBUM2106/D (868.0kB)1
NCP1529ASNT1GEVB Bill of Materials ROHS CompliantNCP1529ASNT1GEVB_BOM_ROHS.PDF (14.0kB)0
NCP1529ASNT1GEVB Gerber Layout Files (Zip Format)NCP1529ASNT1GEVB_GERBER.ZIP (446.0kB)0
NCP1529ASNT1GEVB SchematicNCP1529ASNT1GEVB_SCHEMATIC.PDF (123.0kB)0
NCP1529ASNT1GEVB Test ProcedureNCP1529ASNT1GEVB_TEST_PROCEDURE.PDF (140.0kB)0
NCP1529MUTBGEVB Bill of Materials ROHS CompliantNCP1529MUTBGEVB_BOM_ROHS.PDF (22.0kB)0
NCP1529MUTBGEVB Gerber Layout Files (Zip Format)NCP1529MUTBGEVB_GERBER.ZIP (372.0kB)0
NCP1529MUTBGEVB SchematicNCP1529MUTBGEVB_SCHEMATIC.PDF (124.0kB)0
NCP1529MUTBGEVB Test ProcedureNCP1529MUTBGEVB_TEST_PROCEDURE.PDF (148.0kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Buck Converter, DC-DC, High Efficiency, Adjustable Output Voltage, Low Ripple, 1.7 MHz, 1 ANCP1529/D (246.0kB)5
Package Drawings (2)
Document TitleDocument ID/SizeRevision
TSOP-5483 (32.5kB)M
UDFN6, 2x2, 0.65P517AB (60.5kB)C
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1529ASNT1GEVBActivePb-free1 A High Efficiency Step-Down Converter Evaluation Board
NCP1529MUTBGEVBActivePb-free1 A High Efficiency Step-Down Converter Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1529ASNT1GActivePb-free Halide freeTSOP-5 / SOT-23-54831Tape and Reel3000$0.3333
NCP1529MU12TBGActivePb-free Halide freeUDFN-6517AB1Tape and Reel3000$0.32
NCP1529MUTBGActivePb-free Halide freeUDFN-6517AB1Tape and Reel3000$0.32
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP1529ASNT1GStep-DownCurrent Mode2.75.50.9 to 3.91961700
NCP1529MU12TBGStep-DownCurrent Mode2.75.51.21861700
NCP1529MUTBGStep-DownCurrent Mode2.75.50.9 to 3.91961700
Buck Converter, DC-DC, High Efficiency, Adjustable Output Voltage, Low Ripple, 1.7 MHz, 1 A (246.0kB) NCP1529
How to Prevent Thermal Issues with High Output Current DC to DC Converters NCP1529
Make a White-LED Torch Using a Buck Converter NCP1529
Use of NCP1529 Pspice Model NCP1529
Pspice Model of NCP1529 NCP1529
EVBUM2106/D - 868 NCP1529MUTBGEVB
NCP1529ASNT1GEVB BOM ROHS NCP1529ASNT1GEVB
NCP1529ASNT1GEVB GERBER NCP1529ASNT1GEVB
NCP1529ASNT1GEVB SCHEMATIC NCP1529ASNT1GEVB
NCP1529ASNT1GEVB TEST PROCEDURE NCP1529ASNT1GEVB
NCP1529MUTBGEVB BOM ROHS NCP1529MUTBGEVB
NCP1529MUTBGEVB GERBER NCP1529MUTBGEVB
NCP1529MUTBGEVB SCHEMATIC NCP1529MUTBGEVB
NCP1529MUTBGEVB TEST PROCEDURE NCP1529MUTBGEVB
TSOP-5 NUP4004M5
UDFN6, 2x2, 0.65P NCP398
NCP1529