A high-current LDO regulator is simple to design with the LP2975 LDO Controller. Using an external P-FET, the LP2975 will deliver an ultra low dropout regulator with extremely low quiescent current.
High open loop gain assures excellent regulation and ripple rejection performance.
The trimmed internal bandgap reference provides precise output voltage over the entire operating temperature range.
Dropout voltage is “user selectable” by sizing the external FET: the minimum input-output voltage required for operation is the maximum load current multiplied by the RDS(ON) of the FET.
Overcurrent protection of the external FET is easily implemented by placing a sense resistor in series with VIN. The 57 mV detection threshold of the current sense circuitry minimizes dropout voltage and power dissipation in the resistor.
The standard product versions available provide output voltages of 5.0V, or 3.3V with specified 25°C accuracy of 1.5% (“A” grade) and 2.5% (standard grade).