The MC33761 is an Low DropOut (LDO) regulator featuring excellent noise performances. Thanks to its innovative design, the circuit reaches an impressive 40 VRMS noise level without an external bypass capacitor. Housed in a small SOT−23 5 leads−like package, it represents the ideal designer’s choice when space and noise are at premium. The absence of external bandgap capacitor accelerates the response time to a wake−up signal and keeps it within 40 s (in repetitive mode), making the MC33761 as a natural candidate for portable applications.

Features

• Ultra−Low Noise: 150 nV/√Hz @ 100 Hz, 40 VRMS

100 Hz−100 kHz Typical, Iout = 60 mA, Co = 1.0 F

• Fast Response Time from OFF to ON: 40 s Typical at a 200 Hz

Repetition Rate

• Ready for 1.0 V Platforms: ON with a 900 mV High Level

• Nominal Output Current of 80 mA with a 100 mA Peak Capability

• Typical Dropout of 90 mV @ 30 mA, 160 mV @ 80 mA

• Ripple Rejection: 70 dB @ 1.0 kHz

• 1.5 Output Precision @ 25°C

• Thermal Shutdown

• Vout Available at 2.5 V, 2.8 V, 2.9 V, 3.0 V, 5.0 V

• Operating Range from −40 to +85°C

• Dual Version is Available as MC33762

• Pb−Free Packages are Available

Applications

• Noise Sensitive Circuits: VCOs RF Stages, etc.

• Bursting Systems (TDMA Phones)

• All Battery Operated Devices