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发布者:微桥 发布时间:2011/8/3 阅读:4670次    关键字: EMP8737
EMP8737-Fast Ultra High-PSRR,Low-Noise,300mA LDO


EMP8737-Fast Ultra High-PSRR,Low-Noise,300mA CMOS Linear Regulator DataSheet

General Description
    The EMP8737 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 for VIN=2.2V ~ 5.5V and supports preset output voltages ranging from 0.8V to 4.5V with 0.05V increment. It also guarantees delivery of 100mA output current for VIN range lower from 1.75V ~ 2.1V. Based on its low quiescent current consumption and its less than 1μA shutdown mode of logical operation, the
    EMP8737 is ideal for battery-powered applications. The high power supply rejection ratio of the EMP8737 holds well for low input voltages typically encountered in battery-operated systems. The regulator is stable with small ceramic capacitive loads (1μF typical). The EMP8737 is Available in miniature SOT-23-5 package.

Features
􀂄 2.2V to 5.5V input range for IOUT 300mA operation
􀂄 1.75V to 2.1V input range for IOUT 100mA operation
􀂄 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
􀂄 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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