AAT2511 Datasheet | AAT

Description The AAT2511 is a member of Analogic Tech's Total Power Management IC™ (TPMIC™) product family. It is prised of two 1MHz step-down converters designed to minimize external ponent size and cost. The input voltage ranges from 2.7V to 5.5V. The output voltage ranges from 0.6V to the maximum applied input voltage and is externally adjustable. Peak current mode control with internal pensation provides a stable converter with low ESR ceramic output capacitors for extremely low output ripple. Each channel has a low 25µA quiescent operating current, which is critical for maintaining high efficiency at light load. For maximum battery life, each converter's highside P-channel MOSFET conducts continuously when the input voltage approaches dropout (100% duty cycle operation). Both regulators have independent input and enable inputs. .. Features - - - - - - - - - - - - - - - - - System Power™ Up to 97% Efficiency 25µA Quiescent Current Per Channel VIN Range: 2.7V to 5.5V VOUT Range: 0.6V to VIN Output Current: 600m A Low RDS(ON) 0.4Ω Integrated Power Switches Low Drop Out 100% Duty Cycle 1.0MHz Switching Frequency Shutdown Current <1µA Current Mode Operation Internal Reference Soft Start Short-Circuit Protection Fast Turn-On (100µs Typical) Over-Temperature Protection 3mm x 3mm, < 1mm high TDFN33-12 Package -40°C to +85°C Temperature Range Applications - - - - - - Cellular Phones Digital Cameras Handheld Instruments Microprocessor/DSP Core/IO Power PDAs and Handheld puters Portable Media Players The AAT2511 is available in a Pb-free, thermallyenhanced 12-pin TDFN33 package, and is rated over the -40°C to +85°C temperature range. Typical Application AAT2511 Efficiency (VIN = 3.3V) VIN C3 10µF U1 AAT2511 VIN1 EN1 LX1 FB1 SGND1 GND1 VIN2 EN2 LX2 FB2 SGND2 GND2 9 1 4 8 5 6 7 C8 0.1µF 2.5V L2 10µH R3 187k 1.8V L1 4.7µH R1 118k C1 10µF R2 59.0k 11 2 3 10 Efficiency (%) 90 85 80 75 70 65 60 0.1 1 10 100 1000 2.5V 1.8V R4 59.0k C2 10µF Load Current (m...