MC33761中文资料Ultra Low−Noise Low Dropout Voltage Regulator with 1.0 V ON/OFF Control数据手册ONSEMI规格书

描述 Description

The MC33761 is a low dropout (LDO) switching voltage regulator featuring excellent noise performances. Thanks to its innovative design, the circuit reaches an impressive 40uVRMS noise level without an external bypass capacitor. Housed in a small SOT-23 5 leads-like package, this LDO 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 40us (in repetitive mode), making the MC33761 as a natural candidate for portable applications.The MC33761 low dropout (LDO) linear voltage regulator also hosts a novel architecture which prevents excessive undershoots in the presence of fast transient bursts, as in any bursting systems.Finally, with a static line regulation better than -75dB, it naturally shields the downstream electronics against choppy lines.

特性 Features

• Ultra Low-Noise: 150 nV/sq. root Hz @ 100 Hz, 40mVRMS 100 Hz - 100 kHz typical, Iout = 60 mA, Co=1.0mF
• Fast Response Time from OFF to ON: 40ms 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, 2.9V, 3.0 V, 5.0V
• Operating Range from -40 to +85°C
• Dual Version is Available as MC33762
• Pb-Free Package May be Available. The G-Suffix Denotes a Pb-Free Lead Finish.

应用 Application

• Noise sensitive circuits: VCOs RF stages etc.
• Bursting systems (TDMA phones)
• All battery operated devices

简介

MC33761属于集成电路（IC）的线性+开关稳压器。由制造生产的MC33761稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。