CS51031: Hysteretic PFET Buck Controller

The Hysteretic PFET Buck Controller is a switching controller for use in dc-dc converters. It can be used in the buck topology with a minimum number of external components. This Hysteretic PFET Buck Controller consists of a VCC monitor for control-ling the state of the device, 1.0 A power driver for controlling the gate of a discrete P-channel transistor, fixed frequency oscillator, short circuit protection timer, programmable soft start, precision reference, fast output voltage monitoring comparator and output stage driver logic with latch.The high frequency oscillator allows the use of small inductors and output capacitors, minimizing PC board area and systems cost. The programmable soft start reduces current surges at start up. The short circuit protection timer significantly reduces the duty cycle to approximately 1/30 of its cycle during short circuit conditions.The CS51031 is available in 8 Lead SO plastic packages.

Features
  • 1A Totem Pole Output Driver
  • High Speed Oscillator (700 Hz max)
  • No Stability Compensation Required
  • Lossless Short Circuit Protection
  • VCC Monitor
  • 2% Precision Reference
  • Programmable Soft Start
  • Wide Ambient Temperature Range:Industrial Grade: -40°C to 85°CCommercial Grade: 0°C to 70°C
  • Pb-Free Packages are Available
Applications
  • FPGA, DSP, I/O and Core
End Products
  • Graphics Card
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Hysteretic PFET Buck ControllerCS51031/D (95.0kB)11
Evaluation Board Documents (2)
Document TitleDocument ID/SizeRevisionRevision Date
Demonstration Note for CS51031 (5 A)CS51031DEMO1/D (768.0kB)0
Demonstration Note for CS51031 (7 A)CS51031DEMO/D (1017.0kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
SOIC-8 Narrow Body751-07 (62.6kB)AK
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CS51031GD8GLast ShipmentsAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tube98
CS51031GDR8GLast ShipmentsAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tape and Reel2500
CS51031YD8GLast ShipmentsAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tube98
CS51031YDR8GActiveAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tape and Reel2500$0.6667
CS51031GD8Last ShipmentsSOIC-8751-071Tube98
CS51031GDR8Last ShipmentsSOIC-8751-071Tape and Reel2500
CS51031YD8ObsoleteSOIC-8751-071Tube98
CS51031YDR8ObsoleteAEC Qualified PPAP CapableSOIC-8751-071Tape and Reel2500
Specifications
ProductTopologyPhasesControl ModeVCC Min (V)VCC Max (V)fSW Typ (kHz)tres Typ (ns)
CS51031YDR8GStep-Down1Hysteretic4.516200
Hysteretic PFET Buck Controller (95.0kB) CS51031
Demonstration Note for CS51031 (5 A) CS51031
Demonstration Note for CS51031 (7 A) CS51031
SOIC-8 Narrow Body CM1216