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NCP1597: Synchronous Buck Converter, 1 MHz, 2.0 A

Datasheet: Buck Regulator Synchronous 1 MHz, 2.0 A
Rev. 3 (556kB)
Product Overview
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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   Benefits
     
  • Input voltage range from 4.0 V to 5.5 V
 
  • Typical +5V applications
  • Internal 140m / 90m MOSFETs
 
  • High efficiency at full load
  • Fixed 1 MHz Switching Frequency
 
  • Reduced output filter component size and value
  • Hiccup Mode Short-Circuit Protection
 
  • Reduced heat durring short circuit
  • Thermal Shutdown Protection
 
  • Prevents overheating in the application
  • Adjustable Output Voltage Down to 0.8 V
 
  • Ability to regulate low output voltages
  • PFM Mode at Light Load
 
  • Increased efficiency at light load versus fixed PWM
Applications   End Products
  • USB Powered Devices
  • Hard Disk Drive (HDD)
  • DSP Power
 
  • Set-Top-Box
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1597AGEVB Active
Pb-free
Synchronous PWM Converter Evaluation Board
Availability & Samples
Specifications
Application Diagram
Interactive Block Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1597AMNTWG Active
Pb-free
NCP1597 DFN-6 506AH 1 260 Tape and Reel 3000 $0.2667
Market Leadtime (weeks) : 8 to 12

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
VCC Min (V)
VCC Max (V)
VO Typ (V)
IO Typ (A)
Efficiency (%)
fSW Typ (kHz)
Package Type
NCP1597AMNTWG  
 $0.2667 
Pb
 Active   
Step-Down
Current Mode
4
5.5
0.8 to 4.95
2
90
1000
DFN-6
Case Outlines
506AH   
NCP1597: Synchronous Buck Converter, 1 MHz, 2.0 A
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Synchronous PWM Converter Evaluation Board - NCP1597AGEVB
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