19-0329; Rev 0; 12/94 EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
High-Accuracy, Low-Dropout Linear
Regulators
MAX687/MAX688/MAX689
_______________General Description
The MAX687/MAX688/MAX689 low-dropout linear
regulators operate with an input-to-output voltage differential limited only by an external
PNP transistor.
Outputs are fixed at 3.
3V (MAX687/MAX688) or 3.
0V (MAX689).
The only external components required are a
PNP pass
transistor and output, compensation, and bypass capacitors.
Base drive to the external
transistor is at least 10mA, permitting output currents to exceed 1A when using high-gain
transistors (β 100).
Output current limiting is implemented by limiting the external transisto...