AS1355
300mA, Triple LDO
1 General Description
The AS1355 is a high-performance triple CMOS low-dropout voltage regulat...
AS1355
300mA, Triple LDO
1 General Description
The AS1355 is a high-performance triple CMOS low-dropout voltage
regulator in a single QFN package. The efficient set of programmable power supplies is optimized to deliver the best compromise between quiescent current and
regulator performance for mobile phones, PDAs, MP3 players, and other battery powered devices.
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 AS1355 is available in a 16-pin QFN 3x3 package.
2 Key Features
3 Independent Voltage
Regulators with Shutdown
Output Current: 300mA each LDO
Programmable Output Voltage Range: 1.25V to 3.6V in 50mV Steps
Accuracy: ±1.0% PSRR: 70dB at 1kHz, 60dB at 100kHz Load Regulation: 3mV (0 to 300mA) Supply Range: 2.3V to 5.5V 0.1V Dropout Voltage @ Iload = 200mA Shutdown Current: 1µA Supply Current Without Load: 160µA Softstart for Low Inrush Current Stable with low ESR Ceramic Capacitors from 1µF to 4.7µF Low Noise: 40µV rms @10Hz to 100kHz Bandwidth Thermal Protection Over-Current Protection Temperature Range: -40°C to +85°C Packag...