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发布者:微桥 发布时间:2011/8/9 阅读:5305次    关键字: EMP2033
EMP2033-Dual,High-PSRR,Low-Noise,300mA LDO


EMP2033-Dual,High-PSRR,Low-Noise,Low-Dropout,300mA CMOS Linear Regulator DataSheet

General Description
    The EMP2033 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 EMP2033 is well suited for portable battery-powered application which requires high efficiency, low noise and small board space. With 150mV low dropout voltage at 300mA output current, EMP2033 sustains high PSRR at very low input voltage which is common in battery-powered application. The EMP2033 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.
    Each regulator in the EMP2033 can be turned off independently, further prolonging the battery life. Internally build-in thermal protection and over-current protection provide additional safety for the end use.
    The EMP2033 is available in miniature 6-pin SOT-23-6, 6-pin FBP and TDFN (2x2) packages.

Features
􀂄 Miniature SOT-23-6 and TDFN-2x2-6 packages
􀂄 300mA guaranteed output current
􀂄 72dB typical PSRR at 1kHz (60dB typical at 10KHz)
􀂄 120μVRMS output voltage noise (10Hz to 100kHz)
􀂄 150mV typical dropout at 300mA
􀂄 150μA typical quiescent current
􀂄 Less than 1μA typical shutdown mode
􀂄 Auto-discharge during chip disable
􀂄 Fast line and load transient response
􀂄 30μs typical 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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