MIC2219 Micrel, Inc. MIC2219
Dynamically Adjustable Dual ВµCap LDO General Description Features The MIC2219 is a dual ВµCap low dropout regulator. The first
regulator is capable of sourcing 150mA, while the second
regulator can source up to 300mA.
Ideal for battery operated applications, the MIC2219 offers
1% accuracy, extremely low dropout voltage (80mV @
100mA), and extremely low ground current, only 48ВµA total.
Equipped with TTL logic compatible enable pins, the MIC2219
can be put into a zero-off-mode current state, drawing no
current when disabled. Separate enable pins allow individual
control of each output voltage.
The additional feature incorporated in the MIC2219 is bringing out the feedback nodes to two external pins, allowing for
dynamic adjustment of the LDO output voltages.
The MIC2219 is a ВµCap design, operating with very small
ceramic output capacitors for stability, reducing required
board space and component cost.
The MIC2219 is available in fixed output voltages in the
10-pin 3mm Г— 3mm MLFв„ў leadless package. Input voltage range: 2.25V to 5.5V Stable with ceramic output capacitor 2 LDO outputs
Output 1 -150mA output current
Output 2 -300mA output current Feedback pins externally accessible Low dropout voltage of 80mV @ 100mA Ultra-low quiescent current of 48ВµA total (24ВµA/LDO) High output accuracy:
+1.0% initial accuracy
+2.0% over temperature Thermal shutdown protection Current limit protection Tiny 10-pin 3mm Г— 3mm MLFв„ў package Applications Cellular phones
Wireless modems …