General Description
●The MIC5156, MIC5157, and MIC5158 Super Low-Dropout (LDO) Regulator Controllers are single IC solutions for high current low-dropout linear voltage regulation. Super LDO™ Regulators have the advantages of an external N-channel power MOSFET as the linear pass element.
●The MIC5156/7/8 family features a dropout voltage as low as the RDS(ON) of the external power MOSFET multiplied by the output current. The output current can be as high as the largest MOSFETs can provide.
●Features
●• 4.5mA typical operating current
●• <1µA typical standby current
●• Low external parts count
●• Optional current limit (35mV typical threshold)
●• 1% initial output voltage tolerance in most configurations
●• 2% output voltage tolerance over temperature
●• Fixed output voltages of 3.3V, 5.0V (MIC5156)
●• Fixed output voltages of 3.3V, 5.0V, 12V (MIC5157)
●• Programmable (1.3 to 36V) with 2 resistors (MIC5156/8)
●• Internal charge pump voltage tripler (MIC5157/8)
●• Enable pin to activate or shutdown the regulator
●• Internal gate-to-source protective clamp
●• All versions available in DIP and SOIC
●Applications
●• Ultrahigh current ultralow dropout voltage regulator
●• Constant high-current source
●• Low parts count 5.0V to 3.3V computer supply
●• Low noise/low-dropout SMPS post regulator
●• High-current, current-limited switch
