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LDO regulator touts 1.6-5.5V input voltage

Posted: 28 Nov 2011 ?? ?Print Version ?Bookmark and Share

Keywords:LDO regulator? inrush current protection? capacitor?

Torex Semiconductor Ltd has revealed its voltage regulators that have output current of 300mA per channel. According to the company, the XC6421 series of small dual high-speed regulators offers an inrush current protection function.

Two regulators with high accuracy (1 percent), high ripple rejection (75dB at 1kHz) and low dropout (70mV at 100mA) are housed in a small USP-6C package (1.8 x 2 x h0.6mm), said the company. These regulators are ideal for applications that require high-density mounting such as cellphones, hand-held video game consoles, portable media players and digital cameras, added Torex.


The XC6421 series has an overcurrent protection circuit of 450mA and short-circuit protection of 125mA.

The input voltage range of the LDO regulator is 1.6-5.5V. The output voltage of each regulator can be set in steps of 0.05V within the range 1.2-3.6V. The supply current is 90?A (TYP.) per regulator. Each regulator has an EN pin function that enables the regulator output of each circuit to be turned off independently. In this standby state, the CL discharge function discharges on the capacitor and rapidly returns the VOUT output to the VSS level.

Protective functions include overcurrent protection circuit (450mA), short-circuit protection (125mA) and thermal shutdown. The protection circuits activate when the output current reaches the limit current or the junction temperature reaches the limit temperature. This is an environment-friendly product that complies with the RoHS Directive and is halogen and antimony free, Torex noted.

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