TPS62420

具有 1 线接口、采用 QFN 封装的双路可调节 600mA 和 1000mA、2.25MHz 步降转换器

The TPS6242x device is a synchronous dual step-down DC–DC converter. It provides two independent output voltage rails powered by 1-cell Li-Ion or 3-cell NiMH/NiCD batteries. The device is also suitable to operate from a standard 3.3-V or 5-V voltage rail.

With an input voltage range of 2.5 V to 6 V, the TPS6242x is ideal for battery-powered portable applications like smart phones, PDAs, and other portable equipment.

With the EasyScale™ serial interface the output voltages can be modified during operation. It therefore supports dynamic voltage scaling for low power DSP and processors.

The TPS6242x operates at 2.25-MHz fixed switching frequency and enter the power-save mode operation at light load currents to maintain high efficiency over the entire load current range. For low-noise applications the devices can be forced into fixed-frequency PWM mode by pulling the MODE/DATA pin High. In the shutdown mode, the current consumption is reduced to 1.2 µA. The device allows the use of small inductors and capacitors to achieve a small solution size.

The TPS6242x operates over a free-air temperature range of –40°C to 85°C. It is available in a 10-pin leadless package 3 mm × 3 mm VSON

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High Efficiency up to 95%

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VIN Range from 2.5 V to 6 V

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2.25-MHz Fixed Frequency Operation

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Output Current 600 mA and 1000 mA

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Adjustable Output Voltage from 0.6 V to VIN

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Pin Selectable Output Voltage Supports Simple

Dynamic VoltageScaling

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Optional EasyScale One-Pin Serial Interface for

Dynamic Output Voltage Adjustment

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Power-Save Mode at Light Load Currents

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180° Out of Phase Operation

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Output Voltage Accuracy in PWM Mode ±1%

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Typical 32-µA Quiescent Current for both

Converters

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100% Duty Cycle for Lowest Dropout

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Available in a 10-Pin VSON 3 mm × 3 mm