Texas Instruments TPS62112

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 to 4-cellLi-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 toincrease 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 loadcurrents. 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-airtemperature range of –40°C to 85°C.

Features

• 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

REMARK:Refer table 4. for list of inductorspage no.17

Typical applications

• Handheld Scanners
• Handheld PCs
• PDAs
• Point-of-Load Regulation From 12-V Bus

More information

• Datasheet
• IC product information