TPS62112

采用 QFN-16 封装的 5V、1.5A，17V 输入电压步降转换器

The TPS6211x devices are a family of low-noise synchronous step-down DC-DC converters that are ideally suited for systems powered from a 2- to 4-cell Li-ion battery or from a 12-V or 15-V rail.

The TPS6211x devices are synchronous pulse width modulation PWM converters with integrated N- and P-channel power MOSFET switches. Synchronous rectification is used to increase efficiency and to reduce external component count. To achieve highest efficiency over a wide load-current range, the converter enters a power-saving, pulse frequency modulation PFM mode at light load currents. Operating frequency is typically 1 MHz, allowing the use of small inductor and capacitor values. The device can be synchronized to an external clock signal in the range of 0.8 MHz to 1.4 MHz. For low-noise operation, the converter can be operated in PWM-only mode. In shutdown mode, the current consumption is reduced to less than 2 µA. The TPS6211x family of devices are available in the 16-pin RSA VQFN package, and operate over a free-air temperature range of –40°C to 85°C.

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High-Efficiency Synchronous Step-Down

Converter With up to 95% Efficiency

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3.1-V to 17-V Operating Input Voltage Range

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Adjustable Output Voltage Range: 1.2 V to 16 V

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Fixed Output Voltage Options Available in

3.3 V and 5 V

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Synchronizable to External Clock: Up to 1.4 MHz

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Up to 1.5-A Output Current

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High Efficiency Over a Wide Load-Current

Range Due to PFM/PWM Operation Mode

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100% Maximum Duty Cycle for Lowest Dropout

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20-µA Quiescent Current Typical

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Overtemperature and Overcurrent Protected

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Available in 16-Pin VQFN Package