MIC5238

Ultra-low input voltage range: 1.5V to 6V
Ultra-low output voltage: 1.1V minimum output voltage
Low dropout voltage: 310mV at 150mA
High output accuracy: ±2.0% over temperature
Cap:  stable with ceramic or tantalum capacitors
Excellent line and load regulation specifications
Zero shutdown current
Reverse leakage protection
Thermal shutdown and current limit protection
IttyBitty(TM) SOT-23-5 package

PDAs and pocket PCs
Cellular phones
Battery powered systems
Low power microprocessor power supplies

Input Supply Voltage........................................... 0.3V to 7V
BIAS Supply Voltage............................................ 0.3V to 7V
Enable Input Voltage........................................... 0.3V to 7V
Power Dissipation ........................................Internally Limited
Junction Temperature ...............................40°C to +125°C
Storage Temperature................................65°C to +150°C
ESD Rating, >1.5A HBM, Note 3

The MIC5238 is an ultra-low voltage output, 150mA LDO regulator. Designed to operate in a single supply or dual supply mode, the MIC5238 consumes only 23A of bias current, improving efficiency. When operating in the dual supply mode, the efficiency greatly improves as the higher voltage supply is only required to supply the 23A bias current while the output and base drive comes off of the much lower input supply voltage.

As a Cap regulator, the MIC5238 operates with a 2.2F ceramic capacitor on the output, offering a smaller overall solution. It also incorporates a logic-level enable pin that allows the MIC5238 to be put into a zero off-current mode when disabled.

The MIC5238 is fully protected with current limit and thermal shutdown. It is offered in the IttyBitty(TM) SOT-23-5 package with an operating junction temperature range of 40°C to +125°C.