NCP1597B: Synchronous Buck Converter, 1 MHz, 2.0 A

The NCP1597B is a fixed 1 MHz, high-output-current, synchronous PWM converter that integrates a low-resistance, high-side P-channel MOSFET and a low-side N-channel MOSFET. The NCP1597B utilizes current mode control to provide fast transient response and excellent loop stability. 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 A. The NCP1597B has features including fixed internal switching frequency (FSW), and an internal soft-start to limit inrush current. Using the EN pin, shutdown supply current is reduced to 3 µA maximum. Other features include cycle-by-cycle current limiting; short-circuit protection, low dropout mode, power saving mode and thermal shutdown. The part is also offered in a 6-pin 3x3mm DFN package under the NCP1597A.

Features
  • Input Voltage Range: from 4.0 V to 5.5 V
  • Internal 140 mΩ HighSide Switching P-FET and 90 mΩ Low-Side N-FET
  • Fixed 1 MHz Switching Frequency
  • Cycle-by-Cycle Current Limiting
  • Overtemperature Protection
  • Start-up with Pre-Biased Output Load
  • 0.8 V +/- 1.5% Reference Voltage
  • Power Saving Mode During Light Load
Benefits
  • Optimized for +5V input
  • High efficiency operation
  • Small output inductor and output capacitance
  • Protection feature
  • Protection feature
  • Compatible with uP Core and I/O requirements
  • Ability to output low output voltage
  • Increased efficiency at light load
Applications
  • +5V DC-DC Regulator
End Products
  • Set-Top-Box
  • LCD-TV / DTV / Plasma TV
  • USB Powered Devices
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Synchronous Buck Converter, 1 MHz, 2.0 ANCP1597B/D (343.0kB)2
Package Drawings (1)
Document TitleDocument ID/SizeRevision
10 PIN QFN, 3x3501-02 (106.4kB)B
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1597BMNTWGActivePb-free Halide freeQFN-10501-021Tape and Reel3000$0.3
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP1597BMNTWGStep-DownCurrent Mode45.50.8 to 4.952901000
Synchronous Buck Converter, 1 MHz, 2.0 A (343.0kB) NCP1597B
10 PIN QFN, 3x3 NCP1597B
NCP1597B