Power Management TPS62561 2.25MHz 600mA Step-Down Converter in TSOT23 Package

Features

• High-Efficiency Step-Down Converter
• Output Current up to 600 mA
• Wide V_IN Range from 2.5 V to 5.5 V for Li-Ion Batteries with Extended Voltage Range
• 2.25-MHz Fixed-Frequency Operation
• Power-Save Mode at Light Load Currents
• Output Voltage Accuracy in PWM Mode ±2.5%
• Typ. 15-µA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Soft Start
• Voltage Positioning at Light Loads
• Available in a Small TSOT, and
  2-mm × 2-mm × 0,8-mm SON Package
• Allows < 1-mm Solution Height
• APPLICATIONS
  • PDAs, Pocket PCs
  • Low-Power DSP Supply
  • Portable Media Players
  • POL Applications

Description

The TPS62560 device is an efficient synchronous step-down dc-dc converter optimized for battery-powered applications. It provides up to 600-mA output current from a single Li-Ion cell and is ideal to power mobile phones and other portable applications.

With a wide input voltage range of 2.5 V to 5.5 V, the device supports applications powered by Li-Ion batteries with extended voltage range, two- and three-cell alkaline batteries, 3.3-V and 5-V input voltage rails.

The TPS62560 operates at 2.25-MHz fixed switching frequency and enters power-save mode operation at light load currents to maintain high efficiency over the entire load-current range.

The power-save mode is optimized for low output-voltage ripple. For low-noise applications, the device can be forced into the fixed-frequency PWM mode by pulling the MODE terminal high. In shutdown mode, the current consumption is reduced to less than 1 µA. TPS62560 and TPS62561 allow the use of small inductors and capacitors to achieve a small solution size.

The TPS62561 operates in a forced fixed-frequency PWM mode, allowing simple filtering of the switching frequency, e.g. for noise sensitive applications.

The TPS62560 is available in a 2-mm × 2-mm 6-terminal SON package, and TPS62561 is available in a 5-terminal TSOT-23 package.

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