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发布者:微桥 发布时间:2011/8/9 阅读:5375次    关键字: EMP5523
EMP5523-Dual,High-PSRR,Low-Noise,300mA LDO


EMP5523-Dual,High-PSRR,Low-Noise,Low-Dropout,300mA CMOS Linear RegulatorDataSheet

General Description
    The EMP5523 series is a family of dual-channel CMOS linear regulators featuring ultra-high power supply rejection ratio (PSRR), low output voltage noise, low dropout voltage, low quiescent current and fast transient response. It guarantees delivery of 300mA output current per regulator, and supports preset output voltages ranging from 1.2V to 3.3V with 0.1V increment (except for 1.85V and 2.85V).
    The EMP5523 is well suited for portable battery-powered application which requires high efficiency, low noise and small board space. With 170mV low dropout voltage at 300mA output current, EMP5523 sustains high PSRR at very low input voltage which is common in battery-powered application. The EMP5523 also features 120μVRMS low output voltage noise without the presence of a noise bypass capacitor, which fits the application where noise and board space are both concerned. Other features include thermal protection and over-current protection.   The EMP5523 is available in SOP-8 package.

Features
􀂄 300mA guaranteed output current
􀂄 72dB typical PSRR at 1kHz (60dB typical at 10KHz)
􀂄 120μVRMS output voltage noise (10Hz to 100kHz)
􀂄 170mV typical dropout at 300mA
􀂄 150μA typical quiescent current
􀂄 Fast line and load transient response
􀂄 2.5V to 5.5V input range
􀂄 Stable with small ceramic output capacitors
􀂄 Over temperature and over current protection
􀂄 ±2% output voltage tolerance
􀂄 SOP-8 package available
􀂄 RoHS compliant and Pb-free
Applications
􀂄 Wireless handsets
􀂄 PCMCIA cards
􀂄 DSP core power
􀂄 Hand-held instruments
􀂄 Battery-powered systems
􀂄 Portable information appliances

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