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发布者:微桥 发布时间:2011-8-8 阅读:3956次    关键字: EMP8965
EMP8965-Fast Ultra High-PSRR,Low-Noise,600mA LDO


EMP8965-Fast Ultra High-PSRR,Low-Noise,Low-Dropout,600mA Micropower CMOS Linear Regulator DataSheet

General Description
    The EMP8965 low-dropout (LDO) CMOS linear regulators feature ultra-high power supply rejection ratio (75dB at 1kHz), low output voltage noise (30μV), low dropout voltage (270mV), low quiescent current (110μA), and fast transient response. It guarantees delivery of 600mA output current, and supports preset output voltages ranging from 1.2V to 3.3V with 0.1V increment (except for 1.85V and 2.85V).
    The EMP8965 is ideal for battery-powered applications by virtue of its low quiescent current consumption and its 1nA shutdown mode of logical operation. The regulator provides fast turn-on and start-up time by using dedicated circuitry to pre-charge an optional external bypass capacitor. This bypass capacitor is used to reduce the output voltage noise without adversely affecting the load transient response. The high power supply rejection ratio of the EMP8965 holds well for low input voltages typically encountered in battery operated systems. The regulator is stable with small ceramic capacitive loads (2.2μF typical). Additional features include regulation fault detection, bandgap voltage reference, constant current limiting and thermal overload protection. Available in miniature 5-pin SOT-89-5 package options, SOT-23-5 and SOT-23-6 package options are also offered to provide additional flexibility for different applications. EMP products is RoHS compliant.

Features
􀂄 Miniature SOT-23-5, SOT-23-6and SOT-89-5 packages
􀂄 600mA guaranteed output current
􀂄 75dB typical PSRR at 1kHz
􀂄 30μV RMS output voltage noise (10Hz to 100kHz)
􀂄 270mV typical dropout at 600mA
􀂄 110μA typical quiescent current
􀂄 1nA typical shutdown mode
􀂄 Fast line and load transient response
􀂄 80μs typical fast turn-on time
􀂄 2.5V to 5.5V input range
􀂄 Stable with small ceramic output capacitors
􀂄 Over temperature and over current protection
􀂄 2% output voltage tolerance

Applications
􀂄 Wireless handsets
􀂄 PCMCIA cards
􀂄 DSP core power
􀂄 Hand-held instruments
􀂄 Battery-powered systems
􀂄 Portable information appliances

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