TPS62220 概述

The TPS62220 device is a high-efficiency, synchronous step-down converter ideally suited for portable systems powered by 1-cell Li-Ion or 3-cell NiMH/NiCd batteries. The TPS62220 is also suitable to operate from a standard 3.3-V or 5-V voltage rail.

With an output voltage range of 6 V down to 0.7 V and up to 400-mA output current, the TPS62220 is ideal for powering the low voltage TMS320 DSP family and processors used in PDAs, pocket PCs, and smart phones. Under nominal load current, the TPS62220 operates with a fixed switching frequency of typically 1.25 MHz. At light load currents, the part enters the power-save mode operation; the switching frequency is reduced and the quiescent current is typically only 15 µA; therefore, the TPS62220 achieves the highest efficiency over the entire load current range.

TPS62220 特性

• High-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency
• 2.5-V to 6-V Input Voltage Range
• Adjustable Output Voltage Range From 0.7 V to V_I
• Up to 400-mA Output Current
• 1.25-MHz Fixed Frequency PWM Operation
• Highest Efficiency Over Wide Load Current Range Due to Power-Save Mode
• 15 µA Typical Quiescent Current
• Soft Start
• 100% Duty Cycle Low-Dropout Operation
• Dynamic Output-Voltage Positioning
• Available in TSOT23 Package

TPS62220 应用

• PDAs and Pocket PC
• Cellular Phones, Smart Phones
• OMAP™ and Low Power DSP Supply
• Digital Cameras
• Portable Media Players
• Portable Equipment
• WLAN PC Cards