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1 Features

1? High-Efficiency Synchronous Step-Down

Converter With up to 95% Efficiency

? 12-μA Quiescent Current (Typical)

? 2.7-V to 10-V Operating Input Voltage Range

? Adjustable Output Voltage Range: 0.7 V to 6 V

? Fixed Output Voltage Options Available With

1.5 V, 1.8 V, and 3.3 V

? Synchronizable to External Clock: Up to 1.2 MHz

? High-Efficiency Over a Wide Load Current Range

in Power-Save Mode

? 100% Maximum Duty Cycle for Lowest Dropout

? Low-Noise Operation in Forced Fixed-

Frequency PWM Operation Mode

? Internal Softstart

? Overtemperature and Overcurrent Protected

? Available in 10-Pin Micro-Small Outline

Package MSOP

2 Applications

? Cellular Phones

? Organizers, PDAs, and Handheld PCs

? Low-Power DSP Supplies

? Digital Cameras and Hard Disks

3 Description

The TPS6205x devices are a family of high-efficiency

synchronous step-down DC-DC converters that are

ideally suited for systems powered from a 1- or 2-cell

Li-Ion battery or from a 3- to 5-cell NiCd, NiMH, or

alkaline battery.

The TPS6205x devices are synchronous pulse width

modulation (PWM) converters with integrated N- and

P-channel power MOSFET switches. Synchronous

rectification increases efficiency and reduces 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 850 kHz, allowing the use of small inductor

and capacitor values. The device can be synchronized to an external clock signal in the range

of 600 kHz to 1.2 MHz. For low noise operation, the

converter can be programmed into forced-fixed

frequency in PWM mode. In shutdown mode, the

current consumption is reduced to less than 2 μA.

The TPS6205x devices are available in the 10-pin

(DGS) micro-small outline package (MSOP) and operates over a free air temperature range of –40°C

to 85°C.