AAT2749 Datasheet | Skyworks Solutions

Description The AAT2749 is a two channel power regulator that operates from 2.3V to 5.5V. The AAT2749 contains a 3.0MHz, 600m A step-down converter and a low input voltage 300m A LDO regulator. The step-down converter can deliver 600m A of load current. The 3.0MHz switching frequency minimizes the size of external ponents while keeping switching losses low. The AAT2749 step-down converter maintains high efficiency throughout the operating range, which is critical for portable applications. Fixed frequency, low noise operation can be forced by a logic signal on the MODE pin. The AAT2749 also contains a 300m A LDO regulator with input voltage capability as low as 1.62V. The LDO regulator power input can be tied directly to the output of the step-down regulator to increase efficiency. Total quiescent current for the step-down converter and LDO is a low 100μA under no load condition. The AAT2749 is available in a Pb-free, space-saving 9-pin chip scale package (CSP) (200μm bump in 400μm pitch) and is rated over the -40°C to +85°C temperature range. Features -  VIN Range: 2.3V to 5.5V -  Two Outputs - VOUT_BUCK = 1.8V - VOUT_LDO = 1.0V, 1.2V -  Step-Down Converter - Ultra-Small 0603 Inductor (Height 1mm) - Up to 92% Efficiency - 3.0MHz Switching Frequency - MODE Selection Pin to Select Forced PWM or PWM/ LL Operation Mode - Current Limit Protection - Automatic Soft Start - LDO Regulator - VINL Range: 1.62V to VIN - 300m A Output Current - Current Limit Protection -  100μA No Load Quiescent Current -  Over-Temperature Protection - -40°C to +85°C Temperature Range Applications -  Battery-Powered Applications -  Cellular and Smart Phones -  Digital Still and Video Cameras -  PDAs, Palmtops -  Portable Instruments Typical Application (2.3V - 5.5V) (1.62V - 5.5V) IN_BUCK CIN_BUCK 4.7μF LX OUT_BUCK IN_LDO...