TPS62040DRCRG4

1.2 / 1.25 MHz的高效率降压转换器 1.2 A/1.25 MHz, HIGH-EFFICIENCY STEP-DOWN CONVERTER

DESCRIPON

The TPS6204x family of devices are high efficiency synchronous step-down dc-dc converters optimized for battery powered portable applications. The devices are ideal for portable applications powered by a single Li-Ion battery cell or by 3-cell NiMH/NiCd batteries. With an output voltage range from 6.0 V down to 0.7 V, the devices support low voltage DSPs and processors in PDAs, pocket PCs, as well as notebooks and subnotebook computers. The TPS6204x operates at a fixed switching frequency of 1.25 MHz and enters 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 pin high. The TPS6204x supports up to 1.2-A load current.

FEATURES

Up to 95% Conversion Efficiency

Typical Quiescent Current: 18 µA

Load Current: 1.2 A

Operating Input Voltage Range: 2.5 V to 6.0 V

Switching Frequency: 1.25 MHz

Adjustable and Fixed Output Voltage

Power Save Mode Operation at Light load Currents

100% Duty Cycle for Lowest Dropout

Internal Softstart

Dynamic Output Voltage Positioning

Thermal Shutdown

Short-Circuit Protection

10 Pin MSOP PowerPad Package

10 Pin QFN 3 X 3 mm Package

APPLICATIONS

PDA, Pocket PC and Smart Phones

USB Powered Modems

CPUs and DSPs

PC Cards and Notebooks

xDSL Applications

Standard 5-V to 3.3-V Conversion