High-Efficiency Synchronous Step-Down Converter With up to 95% Efficiency
3.1-V to 17-V Operating Input Voltage Range
Adjustable Output Voltage Range From 1.2 V to 16 V
Fixed Output Voltage Options Available in 3.3 V and 5 V
Synchronizable to External Clock Signal up to 1.4 MHz
Up to 1.5-A Output Current
High Efficiency Over a Wide Load-Current Range Due to PFM/PWM Operation Mode
100% Maximum Duty Cycle for Lowest Dropout
20-µA Quiescent Current (Typical)
Overtemperature and Overcurrent Protected
Available in 16-Pin QFN Package
APPLICATIONS
Point-of-Load Regulation From 12-V Bus
Organizers, PDAs, and Handheld PCs
Handheld Scanners
Description
The TPS6211x devices are a family of low-noise synchronous step-down dc-dc converters that are ideally suited for systems powered from a 2-cell Li-ion battery or from a 12-V or 15-V rail.
The TPS6211x is a synchronous PWM converter with integrated N- and P-channel power MOSFET switches. Synchronous rectification is used to increase efficiency and to reduce 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 1 MHz, allowing the use of small inductor and capacitor values. The device can be synchronized to an external clock signal in the range of 0.8 MHz to 1.4 MHz. For low-noise operation, the converter can be operated in PWM-only mode. In the shutdown mode, the current consumption is reduced to less than 2 µA. The TPS6211x is available in the 16-pin (RSA) QFN package, and operates over a free-air temperature range of -40°C to 85°C.
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
Inventory
Reported Distributor Inventory as of 10:05 AM GMT, 08 Nov 2009
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
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