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AAT2511_0605 bảng dữ liệu(PDF) 1 Page - Advanced Analogic Technologies |
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1 / 20 page AAT2511 Dual 600mA, 1MHz Step-Down DC/DC Converter 2511.2006.05.1.4 1 SystemPower™ General Description The AAT2511 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product fam- ily. It is comprised of two 1MHz step-down con- verters designed to minimize external component 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 compensa- tion provides a stable converter with low ESR ceram- ic output capacitors for extremely low output ripple. Each channel has a low 25µA quiescent operating current, which is critical for maintaining high effi- ciency at light load. For maximum battery life, each converter's high- side P-channel MOSFET conducts continuously when the input voltage approaches dropout (100% duty cycle operation). Both regulators have independent input and enable inputs. The AAT2511 is available in a Pb-free, thermally- enhanced 12-pin TDFN33 package, and is rated over the -40°C to +85°C temperature range. Features • Up to 97% Efficiency • 25µA Quiescent Current Per Channel •VIN Range: 2.7V to 5.5V •VOUT Range: 0.6V to VIN • Output Current: 600mA • 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 Computers • Portable Media Players Typical Application AAT2511 Efficiency (VIN = 3.3V) Load Current (mA) 60 65 70 75 80 85 90 95 100 0.1 1 10 100 1000 2.5V 1.8V 4.7 μH L1 10 μF C1 1.8V 118k R1 59.0k R2 10 μH L2 10 μF C2 2.5V 59.0k R4 10 μF C3 VIN 187k R3 FB1 2 EN1 1 LX1 11 GND2 7 LX2 8 GND1 10 SGND1 3 VIN1 12 VIN2 9 SGND2 6 FB2 5 EN2 4 AAT2511 U1 0.1 μF C8 |
Số phần tương tự - AAT2511_0605 |
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Mô tả tương tự - AAT2511_0605 |
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