Low Dropout Linear Regulator
The MAX1819 operates from a 2.5 V to 5.5V supply. The high-accuracy (۫%) output voltage is preset to popular voltages (1.5 V, 1.8 V, 2 V, 2.5 V, 3.3 V, and 5 V) or can be adjusted from 1.25 V to 5.5 V with an external resistive divider.
An internal PMOS pass transistor allows the low, 125 microamps supply current to remain independent of load, extending battery life in portable equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, digital cameras, and notebook computers. Supply current is further reduced to 0.1 microamp in logic-controlled shutdown.