EMP2133-Dual,High-PSRR,Low-Noise,Low-Dropout,300mA CMOS Linear Regulator DataSheet

General Description
    The EMP2133 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 EMP2133 is well suited for portable battery-powered application which requires high efficiency, low noise and small board space. With 130mV low dropout voltage at 300mA output current, EMP2133 sustains high PSRR at very low input voltage which is common in battery-powered application. The EMP2133 also features 110μVRMS 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 EMP2133 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 EMP2133 is available in miniature SOT-23-6 and TSOP-6 package.

Features
􀂄 Miniature SOT-23-6 package
􀂄 300mA guaranteed output current
􀂄 70dB typical PSRR at 1kHz (55dB typical at 10KHz)
􀂄 110μVRMS output voltage noise (10Hz to 100kHz)
􀂄 130mV 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
􀂄 35μs 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