1MHz Step-Down DC/DC Converter / LDO Regulator

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Manufacturer Skyworks


Description :

The AAT2500 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family. 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 features 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 compensation provides a stable converter with a low equivalent 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 voltage 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, and is rated over a temperature range of -40°C to +85°C.

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    • 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) 0.4 Integrated Power Switches
    • Low Dropout 100% Duty Cycle
    • 1MHz Switching Frequency
    • Internal Soft Start
    • Over-Temperature Protection
    • Current Limit Protection
    • Available in TDFN33-12 Package
    • -40°C to +85°C Temperature Range

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Features Similar products
Control scheme Peak Current Mode  

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Switching frequency (kHz) 1000  
Max Input Voltage (V) 2.7 to 5.5  
Output Voltage (V) 0.6 to 5.5  
Typ. Active Current (µA) 25  
Typ. Dropout Voltage @ Max. lout (mV) 400  
Output Capacitor Type 4.7 to 10 μF, X5R or X7R Ceramic Capacitor  
Output Current (mA) 300  
Operating Temperature (°C) -40 to +85  
Package TDFN33-12