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Power Electronics

Low Voltage Single Supply LDO Portfolio

Exar Corp. announced the expansion of its low voltage, low-dropout (LDO) regulators with the new XR71211.  This LDO provides 1.5 A from voltages as low as 1.4 V and a guaranteed dropout voltage of 250 mV at maximum junction temperature. The XR71211 is targeted at 1.5 V to 1.2 V and 1.8 V to 1.5 V conversions.  The new LDO is targeted at a wide range of markets including communications, enterprise solutions, industrial systems and space constrained consumer devices.

Exar achieves the low dropout performance of the XR71211 regulator without requiring either an external bias voltage or an internal charge pump, which can often generate unwanted noise and affect system operation. The new LDO uses a single supply which reduces board layout complexity by avoiding the need to route a secondary bias rail to the LDO.  Operating input voltage range is 1.4 V to 2.625 V and the device provides output voltages down to 0.6 V with an accuracy of 0.5% using ceramic capacitors. In addition, precision enable and power good functions allow for easy sequencing and control.

The XR71211 is available now in RoHS compliant, green/halogen free space-saving 10-pin 3 x 3mm DFN package and is priced from $1.59 in 1000 piece quantities.

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