LDO regulator is housed in ultra-small package
Torex Semiconductor
XC6229 LDO regulator
The XC6229 series is a high-speed LDO regulator housed in an ultra-small LGA-4B01 package.
Measuring 0.75 x 0.75 x 0.3mm, the LGA-4B01 is the latest in the range of ultra-small packages from Torex.
It utilises a new construction technique, removing the need for traditional bonding wires in favour of direct connection between die and pads.
This allows for significant improvements in thermal performance, resulting in higher power dissipation when compared with traditional packaging techniques.
The small package size makes the XC6229 suitable for space-saving designs.
It also offers high accuracy, low output noise and high ripple rejection (typically 80dB at 1kHz).
The LGA-4B01 package construction also offers benefits in other areas.
By removing the need for bonding wires between the die and pad, it also reduce the total resistance between the input and output pins of the LDO by an appreciable amount.
As a result, the XC6229's drop-out voltage is typically only 160mV at 300mA, which helps to extend usable battery life in portable electronic devices.
Others features of the XC6229 series include a chip enable pin to turn the IC on and off, a CL discharge function to quickly discharge the output capacitor when the IC is turned off.
Power consumption is typically 100uA during operation, reducing to 0.01uA in standby mode.
The XC6229 also include a number of protection circuits and the IC will be forced to stop operating by the thermal shutdown circuit when the chip's temperature reaches 150C.
This function is implemented using hysteresis and will allow the XC6229 to resume normal operation when the chip's temperature drops below 125C.
In addition, the XC6229 includes an overcurrent protection circuit that not only stops the IC when the output current is too high, but also permits the IC to automatically resume normal operation as soon as the over-current condition disappears.
In-rush current protection is also included to help manage the start-up phase.
The XC6229 is fully compatible with low ESR ceramic capacitors at the input and output stages.
The output voltage is selectable in 0.05V increments within the range of 1.2 to 4V with a +/-1 per cent tolerance as standard.
The operating voltage range is from 1.6 to 5.5V.
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