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发布者:微桥 发布时间:2011-8-8 阅读:5094次    关键字: EMP8734
EMP8734-Fast Ultra High-PSRR,Low-Noise,300mA LDO


EMP8734-Fast Ultra High-PSRR,Low-Noise,300mA CMOS Linear Regulator DataSheet

General Description
    The EMP8734 features ultra-high power supply rejection ratio, low output voltage noise, low dropout voltage, low quiescent current and fast transient response. It guarantees delivery of 300mA output current and supports preset output voltages ranging from 0.8V to 4.5V with 0.05V increment. Based on its low quiescent current consumption and its less than 1μA shutdown mode of logical operation, the EMP8734 is ideal for battery-powered applications. The high power supply rejection ratio of the EMP8734 holds well for low input voltages typically encountered in battery-operated systems. The regulator is stable with small ceramic capacitive loads (1μF typical). The EMP8734 is Available in miniature SOT-23-5 SOT-353(SC-70-5 ), SOT-343 and TDFN-6 packages.

Features
􀂄 300mA guaranteed output current
􀂄 62dB typical PSRR at 1kHz
􀂄 110μV RMS output voltage noise (10Hz to 100kHz)
􀂄 290mV typical dropout at 300mA
􀂄 57μA typical quiescent current
􀂄 Less than 1μA typical shutdown mode
􀂄 Fast line and load transient response
􀂄 2.2V to 5.5V input range
􀂄 Auto-discharge during chip disable
􀂄 80μs typical turn-on time
􀂄 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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