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发布者:微桥 发布时间:2011-8-3 阅读:3537次    关键字: EMP8021
EMP8021-600mA CMOS Linear Regulator


EMP8021-600mA CMOS Linear Regulator DataSheet

General Description
    The EMP8021 low-dropout (LDO) CMOS linear regulators feature low output voltage noise (63μV), low quiescent current (50μA), and fast transient response. It guarantees delivery of 600mA output current, and supports preset output voltages ranging from 0.8V to 4.75V with 0.05V increment.
    The EMP8021 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 regulator is stable with small ceramic capacitive loads (2.2μF typical).
    Additional features include bandgap voltage reference, constant current limiting and thermal overload protection. The EMP8021 is available in miniature 5-pin SOT-23-5 package.

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

Features
 Miniature SOT-23-5 packages
 600mA guaranteed output current
 63μV RMS output voltage noise (10Hz to 100kHz) (Vout=3.3V, Cbypass=10nF)
 580mV typical dropout at 600mA(Vout=3.3V)
 270mV typical dropout at 300mA(Vout=3.3V)
 50μA typical quiescent current
 1nA typical shutdown mode
 Fast line and load transient response
 140μs typical fast turn-on time (Vout=3.3V, Cbypass=10nF)
 2.2V to 5.5V input range
 Stable with small ceramic output capacitors
 Over temperature and over current protection
 ±2% output voltage tolerance

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