AAT2782中文资料Triple Output PMIC: Dual Buck with Low-VIN LDO数据手册Skyworks规格书

描述 Description

The AAT2782 provides three independently regulated DC outputs: two step-down (Buck) regulators and a single low input voltage, low drop-out (LDO) regulator. The input voltage range for the step-down regulators is 2.7V to 5.5V, while the LDO regulator allows inputs from 1.5V to 5.5V. The low input voltage LDO regulator allows high efficiency, step-down, low noise outputs. In addition, the LDO input may be connected to step-down outputs 1 or 2.
The Channel 1 and 2 step-down regulators can deliver up to 1200mA and 600mA output current, respectively. Step-down output voltages are set with external resistors. Switching frequency is set at 1.3MHz to ensure small external filtering components. Current mode control assures fast transient response and stable operation across the operating range. The Channel 3 LDO regulator can deliver up to 400mA with -80dB power supply rejection ratio (PSRR) and 65µVRMS output noise with an optional bypass capacitor. The LDO output voltage is factory set with a default voltage of 1.20V. Independent enable and input pins are provided. The device consumes low quiescent current and provides high efficiency across the load range for maximum life in battery systems.
The AAT2782 is available in the Pb-free, 16-pin TDFN34 package and is rated over the -40°C to 85°C operating temperature range.

特性 Features

·VIN Range Step-Down (Buck): 2.7V to 5.5V
·VIN Range Low Drop-Out (LDO): 1.5V to 5.5V
·Output Voltage Range: 0.6V to VIN
·Step-Down Output Current:
·Channel 1: 1200mA
·Channel 2: 600mA
·LDO Output Current:
·Channel 3: 400mA
·High Efficiency with Low RDS(ON) Switches
·Step-Down up to 97%
·LDO Regulator up to 80%
·Total Quiescent Current 170µA
·Shutdown Current: 1µA
·Step-Down Converters
·1.3MHz Switching Frequency
·Current Mode Control
·Cycle-by-Cycle Current Limit
·High Efficiency Light-Load Mode Operation
·LDO Converter
·Ultra Low Noise with Bypass Capacitor
·Over-Current Protection
·200µs Internal Soft Start
·Over-Temperature Protection
·TDFN34-16 Low Profile Package
·-40°C to 85°C Temperature Range