AS1357 Datasheet | austriamicrosystems AG

a u s t ri a m i c r o s y s t e m s P r o g r a m m a b l e Tr i p l e L D O .. P ro du c t B ri e f 1 General Description The AS1357 is a high-performance triple CMOS lowdropout voltage regulator in a single 4x4 package. The efficient set of programmable power supplies is optimized to deliver the best promise between quiescent current and regulator performance for mobile phones, PDAs, MP3 players, and other battery powered devices. The one-time-programmable (OTP) function provides greater design flexibility by allowing for independent programming of the output voltage for each regulator onsite. The OTP function allows for fast prototyping as well as full-production in the field. Factory trimmed versions are also available. Stability is guaranteed with ceramic output capacitors of only 1µF (±20% - X5R) up to 4.7µF (±20% - X5R). The low equivalent series resistance (ESR) of these capacitors ensures low output impedance at high frequencies. Regulation performance is excellent even under low dropout conditions, when the power transistor has to operate in linear mode. The low-noise performance allows direct connection of noise sensitive circuits without additional filtering networks. The AS1357 is available in a 12-pin QFN 4x4 package or in a wafer bumping package. 2 Key Features ! ! ! 3 Independent Voltage Regulators with Shutdown Output Current: 200m A each LDO One Time Programmable Output Voltage (User- or Factory-Trimmed) Programmable Output Voltage Range: 1.8 to 3.3V in 0.1V Steps Accuracy: ±1.5% PSRR: 70d B at 1k Hz, 40d B at 100k Hz Line Regulation: ±2m V Load Regulation: ±0.6m V Supply Range: 3 to 5.5V 0.2V Dropout Voltage @ I = 200m A Shutdown Current: ≤1µA Supply Current Without Load: 175µA (typ) Softstart for Low Inrush Current Stable with low ESR Ceramic Capacitors from 1 to 4.7µF Low Noise - 40µV rms @10Hz to 100k Hz Bandwidth Thermal Protection Over-Current Protection Temperature Range: -40 to +85°C Wafer Bumping QFN12 4x4, Pitch...