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AAT2500 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT2500 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
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1 / 26 page  AAT2500 1MHz Step-Down Converter/LDO Regulator 2500.2006.05.1.16 1 SystemPower™ Typical Application AAT2500 Step-Down Converter Efficiency Load Current (mA) 60 65 70 75 80 85 90 95 100 0.1 1 10 100 1000 VIN = 3.3V 1.8V 2.5V 4.7 μH L1 4.7 μF C1 2.2 μF C4 10 μF C3 10nF C5 PGND 1 LX 2 VP 3 VCC 4 ENLDO 9 EN 10 FB 11 SGND 12 VLDO 5 OUT 6 GND 8 BYP 7 AAT2500 U1 L1 Sumida CDRH3D16-4R7 C1 Murata GRM219R61A475KE19 C3 Murata GRM21BR60J106KE19 VIN = 2.7V to 5.5V 3.3V at 300mA 2.5V at 400mA General Description The AAT2500 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product fam- ily. It is a low dropout (LDO) linear regulator and a step-down converter with an input voltage range of 2.7V to 5.5V, making it ideal for applications with single lithium-ion/polymer batteries. The LDO has an independent input and is capable of delivering up to 300mA. The linear regulator has been designed for high-speed turn-on and turn-off performance, fast transient response, and good power supply rejection ratio (PSRR). Other fea- tures include low quiescent current and a low dropout voltage. The 400mA step-down converter is designed to minimize external component size and cost while maintaining a low 25µA no load quiescent current. Peak current mode control with internal compen- sation provides a stable converter with a low equiv- alent series resistance (ESR) ceramic output capacitor for extremely low output ripple. For maximum battery life, the step-down converter increases to 100% duty cycle and has a typical 180mV dropout voltage at 400mA. The output volt- age is either fixed or adjustable with an integrated P- and N-channel MOSFET power stage and 1MHz switching frequency. The AAT2500 is available in a 12-pin TDFN33 or STDFN33 package, and is rated over a tempera- ture range of -40°C to +85°C. Features •VIN Range: 2.7V to 5.5V • 300mA LDO Current Output • 400mV LDO Dropout Voltage at 300mA • High Output Accuracy: ±1.5% • Fast LDO Line / Load Transient Response • 400mA, 96% Efficiency Step-Down Converter • 25µA No Load Quiescent Current for Step- Down Converter • Shutdown Current <1µA • Low RDS(ON) 0.4Ω Integrated Power Switches • Low Dropout 100% Duty Cycle • 1MHz Switching Frequency • Internal Soft Start • Over-Temperature Protection • Current Limit Protection • Available in TDFN33-12 or STDFN33-12 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 |
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