Synchronous Stepdown Switching Regulator Circuit


Posted on Mar 19, 2013

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
Click here to download the full size of the above Circuit.

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.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Tune six metres on your two metre receiver
TONE CONTROL AND SUBWOOFER OUT
200 Watt audio power amplifier
classic led flasher circuit
Tech Toy Hacks
Voltmeter Ammeter
how to make simple active low pass
musical continuity
Automatic UPS system wiring circuit diagram for Home or Office (New Design With One Live Wire)
The Xonar Essence STX
Headphone amplifier with TDA2004 circuit
Preamp Protection
EE-8 Field Telephone
PC Output Interface
A typical circuit for the LM4910 two-channel amplifier
Synchronous electric motor chokes down according to the stator current excitation circuit



Top