AAT AAT1171
The AAT1171 SwitchReg, a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product family, has been specifically designed to dynamically control the operating voltage of a WCDMA or CDMA power amplifier inside single lithium-ion battery-powered systems. The AAT1171 outputs a voltage between 0.6V and 3.6V, thereby optimizing the amplifier efficiency at both low and high transmit levels. It can • deliver 600mA of continuous load current while • maintaining a low 45µA of no load quiescent current.| Part No. | AAT1171 |
|---|---|
| Datasheet | AAT1171 Download |
| Manufacturer |  AAT |
| Description | Voltage-Scaling Step-Down Converter |
| Buy | Stock & Price |
GENERAL DESCRIPTION
AAT1171FEATURES
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● SwitchReg™ The AAT1171 output voltage is controlled via an
● analog signal from the baseband processor.
● The 2MHz switching frequency minimizes the size of
● external components while keeping switching losses
● low. A low resistance MOSFET, typically 230mΩ,
● provides a low dropout voltage as the battery input voltage approaches the programmed output voltage and the converter runs at 100% duty cycle. To further improve system efficiency, an 85mΩ bypass MOSFET transistor is also included to allow the PA
APPLICATIONS
to be powered directly from the battery.● WCDMA or CDMA PA in Cellular Phones, The AAT1171 feedback and control method gives Smartphones, Feature Phones, etc. excellent load regulation and transient response
● Express Card while maintaining small external components. The
● PCMCIA Data Cards output voltage responds in less than 30µs. The converter can be synchronized to an external system clock, forced to operate in Light Load (LL) mode for highest efficiency at light loads, or in Pulse Width Modulation (PWM) mode for low noise operation.
