AS1358 Datasheet | austriamicrosystems AG

AS1358/AS1359 150m A/300m A, Ultra-Low-Noise, High-PSRR Low Dropout Regulators .. Product Brief 1 General Description The AS1358/AS1359 are ultra-low-noise, low-dropout linear regulators specifically designed to deliver up to 150/300m A continuous output current, and can achieve a low 140m V dropout for 300m A 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 150m A 300m A 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 50m V steps) Output Noise: 9µVRMS @ 100Hz to 100k Hz Power-Supply Rejection Ratio: 92d B @ 1k Hz Low Dropout: 140m V @ 300m A Load Stable with 1µF Ceramic Capacitor for any Load Guaranteed 150/300m A 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 80d B (up to 10k Hz). The AS1358/AS1359 requires only 1µF output capacitor for stability at any load. When the LDO is disabled, current consumption drops below 500n A. The devices are available in a TSOT23 5-pin package. 3 Applications The devices are ideal for mobile phones, wireless phones, PDAs, handheld puters, mobile phone base stations, Bluetooth portable radios and accessories, wireless LANs, digital cameras, personal audio devices, and any other portable, battery-powered application. Figure 1. Typical Application Circuit Input 2 to 5.5V CIN 1µF 1 IN 5 OUT Output 1.5 to 4.5V IN 1 5 OUT 2 GND AS1358/ AS1359 GND 2 AS1358/ AS1359 On Off 3...