NCP1597: Synchronous Buck Converter, 1 MHz, 2.0 A

The NCP1597A family is a fixed 1 MHz frequency, high-output-current, synchronous PWM converter that integrate low-resistance, high-side P-channel MOSFETs and low-side N-channel MOSFETs. The NCP1597A utilizes current mode control to provide fast transient response and excellent loop stability and supports PFM mode at light load for higher efficiency. It regulates input voltages from 4.0 V to 5.5 V down to an output voltage as low as 0.8 V and is able to supply up to 2.0 A.The NCP1597A has features including fixed internally switching frequency (FSW), and an internal soft-start to limit inrush currents. Using the EN pin, shutdown supply current is reduced to 1 µA maximum.Other features include cycle-by-cycle current limiting; short-circuit protection, power saving mode and thermal shutdown. The NCP1597A is pin to pin compatible to the 1.5A NCP1595A. The NCP1597B offers the same performance in a 10-pin 3x3mm DFN package.

Features
  • Input voltage range from 4.0 V to 5.5 V
  • Internal 140m / 90m MOSFETs
  • Fixed 1 MHz Switching Frequency
  • Hiccup Mode Short-Circuit Protection
  • Thermal Shutdown Protection
  • Adjustable Output Voltage Down to 0.8 V
  • PFM Mode at Light Load
Benefits
  • Typical +5V applications
  • High efficiency at full load
  • Reduced output filter component size and value
  • Reduced heat durring short circuit
  • Prevents overheating in the application
  • Ability to regulate low output voltages
  • Increased efficiency at light load versus fixed PWM
Applications
  • USB Powered Devices
  • Hard Disk Drive (HDD)
  • DSP Power
End Products
  • Set-Top-Box
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Synchronous Buck Converter, 1 MHz, 2.0 ANCP1597/D (341.0kB)3
Package Drawings (1)
Document TitleDocument ID/SizeRevision
DFN 3x3x0.9mm, 0.95p506AH (25.9kB)O
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1597AGEVB Bill of Materials ROHS CompliantNCP1597AGEVB_BOM_ROHS.PDF (547.0kB)2
NCP1597AGEVB Gerber Layout Files (Zip Format)NCP1597AGEVB_GERBERS.ZIP (163.0kB)2
NCP1597AGEVB SchematicNCP1597AGEVB_SCHEMATIC.PDF (177.0kB)2
NCP1597AGEVB Test ProcedureNCP1597AGEVB_TEST_PROCEDURE.PDF (110.0kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1597AGEVBActivePb-freeSynchronous PWM Converter Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1597AMNTWGActivePb-freeDFN-6506AH1Tape and Reel3000$0.2667
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP1597AMNTWGStep-DownCurrent Mode45.50.8 to 4.952901000
Synchronous Buck Converter, 1 MHz, 2.0 A (341.0kB) NCP1597
NCP1597AGEVB BOM ROHS NCP1597AGEVB
NCP1597AGEVB GERBERS NCP1597AGEVB
NCP1597AGEVB SCHEMATIC NCP1597AGEVB
NCP1597AGEVB TEST PROCEDURE NCP1597AGEVB
DFN 3x3x0.9mm, 0.95p NTLGF3402P
NCP1597