AS1358

AS1358/AS1359 150mA/300mA, Ultra-Low-Noise, High-PSRR Low Dropout Regulators www.datasheet4u.com Product Brief 1 General Description The AS1358/AS1359 are ultra-low-noise, low-dropout linear regulators specifically designed to deliver up to 150/300mA continuous output current, and can achieve a low 140mV dropout for 300mA load current. The LDOs are designed and optimized to work with low-cost, smallcapacitance ceramic capacitors. The devices are available as the standard products listed in Table 1. Table 1. Standard Products Model AS1358 AS1359 Load Current 150mA 300mA Output Voltage Preset – 1.5 to 4.5V Preset – 1.5 to 4.5V 2 Key Features ! ! ! ! ! ! ! ! ! ! ! Preset Output Voltages: 1.5 to 4.5V (in 50mV steps) Output Noise: 9µVRMS @ 100Hz to 100kHz Power-Supply Rejection Ratio: 92dB @ 1kHz Low Dropout: 140mV @ 300mA Load Stable with 1µF Ceramic Capacitor for any Load Guaranteed 150/300mA Output 1.25V Internal Reference Extremely-Low Quiescent Current: 40µA Excellent Load/Line Transient Overcurrent and Thermal Protection TSOT23 5-pin Package An integrated P-channel MOSFET pass transistor allows the devices to maintain extremely low quiescent current (40µA). The AS1358/AS1359 uses an advanced architecture to achieve ultra-low output voltage noise of 9µVRMS and a power-supply rejection-ratio of better than 80dB (up to 10kHz). The AS1358/AS1359 requires only 1µF output capacitor for stability at any load. When the LDO is disabled, current consumption drops below 500nA. The...