MC33761屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由安森美半導(dǎo)體公司制造生產(chǎn)的MC33761穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負(fù)載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個(gè)最小量，并且在工作時(shí)會(huì)將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對(duì)于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對(duì)噪聲高度敏感的應(yīng)用。

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.

特性 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