Capable of driving up to 200mA, the new LDO families offer fixed voltage outputs ranging from 1.2V to 3.6V with output voltage levels provided in 100mV intervals. The regulators are single output devices and exhibit typical dropout voltages of only 90mV @ 2.5V output voltage. The devices incorporate overcurrent protection and are equipped with an on/off control function to minimize total system power consumption. Additionally, the TCR4SxxDWBG family has an auto discharge function for rapid discharge of the LDO when switched off using the control voltage
Designed for low power operation, devices in the new LDO families have low typical quiescent bias currents of 45µA, while typical standby currents are down to just 1µA. Typical power supply ripple rejection ratio is a high 80dB (IOUT = 10mA, f = 1kHz), while output noise voltage is rated at only 30µVrms.
The new regulators are ideal for mobile phones, PDAs and other portable battery operated applications requiring high-density component mounting with low system power consumption. In addition to their small size, the LDOs also allow designers to use small ceramic input and output capacitors to further reduce board space requirements.