Micrel MIC5156/5157/5158 Super LDO™ Regulator Controller is a single IC solution for high-current low-dropout linear voltage regulation. Super LDO™ Regulators have the advantages of an external component count, programmable output voltage, and low static current.
The MIC5156/5157/5158 family are single IC solutions for high-current low-dropout linear voltage regulation. These controllers utilize an external N-channel power MOSFET as the linear pass element, offering a dropout voltage as low as the Rds(on) of the external MOSFET multiplied by the output current.
The MIC5156 requires an external gate drive supply, while the MIC5157 and MIC5158 include an internal charge pump tripler to generate the necessary gate drive voltage. The family operates from 3V to 36V input and features constant-current limiting when a 35mV threshold is detected across an optional sense resistor.
| Operating Supply Voltage Range | 3V to 36V |
|---|---|
| Typical Operating Current (MIC5156) | 4.5mA |
| Typical Standby Current | <1µA |
| Current Limit Threshold | 35mV |
| Initial Output Voltage Tolerance | 1% |
| Output Voltage Tolerance (Over Temp) | 2% |
| Shutdown Supply Current | <11µA |
The dropout voltage is as low as the Rds(on) of the external power MOSFET multiplied by the output current.
No, they each have an internal charge pump tripler to produce the gate drive voltage.