Synchronous Stepdown Switching Regulator Circuit

  
A shows a typical LTC 1148 surface-mount, application providing 5 V at 2 A from an input voltage of 5.5 V to 13.5 V. The operating efficiency, shown in B, peaks at 97% and exceeds 90% from 10 mA to 2 A with a 10-V input. Ql and Q2 comprise the main switch and synchronous switch, respectively, and inductor current is measured via the voltage drop across the current shunt. /vgENSE is the key component used to set the output, current capability according to the formula/QUT =100 mV/ftSENSE.
Synchronous Stepdown Switching Regulator Circuit - schematic

The advantages of current control include excellent line and load transient rejection, inherent short-circuit protection and controlled startup currents. Peak inductor current is limited to 150 mV//SENSE or 3 A for the circuit in A.



Recommended videos


  • Switch mode power supply tutorial: DC-DC buck converters
    Duration: 10:05.
  • Switch Mode Power Supply / Regulator (Tutorial with basic example) - Ec-Projects
    Duration: 25:00.
  • DIY Buck Converter || How to step down DC voltage efficiently
    Duration: 5:33.

News


  • ETAuto.com
    NEW DELHI: Automotive components manufacturer STMicroelectronics has developed high-temperature Silicon-Controlled Rectifiers (SCRs) which allow manufacturers of voltage regulators, inrush current limiters for , ...
     20 January 2017
  • New generation of multiple output laboratory power supplies
    Electropages (blog)
    Electropages (blog) To provide its impressive power density the MX series combines high frequency pre-regulation with linear post-regulation to offer performance that comes close to that of an all-linear design. Excellent line and load r
     19 January 2017
  • EE Times
    EE Times They are current delivery mechanisms used in conjunction with low-frequency power amplifiers like audio or motor drive circuits or as current switches in DC-DC converters such as voltage regulators with outputs. The power transistor
     17 January 2017
  • WebWire (press release)
    WebWire (press release) High-temperature Silicon-Controlled Rectifiers (SCRs) from STMicroelectronics allow manufacturers of voltage regulators, inrush current limiters for , motor-control circuits, and industrial solid-state relays to improv
     16 January 2017
  • ThomasNet News (press release) (blog)
    May Be First to Meet Level VI Energy Efficiency StandardIn contrast, most existing Level VI DC output EPS are and therefore relatively “noisy”. The unique design of the Triad WAU Wall Plug-In AC required higher grade core mate
     12 January 2017
  • Electronics Weekly
    ON's portfolio includes automotive-grade mosfets, IGBTs, LDOs and ; industrial motor power modules and discretes; and ushless DC motor chips and modules. To this has been added Fairchild IGBTs for solar inverters, ...Fairchild parts availab
     10 January 2017
  • Hackaday
    Hackaday , LCD displays, large-scale integration, class D audio and of course the demise of the thermionic tube, to name but a few. The result is often that the appliance itself runs from a low voltage. Where once you would have had a
     30 December 2016
  • ThomasNet News (press release) (blog)
    ThomasNet News (press release) (blog) TCM series can be designed into circuit boards on a large number of power electronic devices used for a wide range of applications, including and converters, inverters, battery management systems and cha
     22 December 2016
  • IHS Electronics360
    IHS Electronics360 The choice of the components used in switch-mode () is extremely important, as their impact on performance is often not considered. These components—such as resistors, capacitors and inductors—are called up
     19 May 2016

.