TI TPS62000DGSR

The TPS6200x devices are a family of low-noise synchronous step-down dc-dc converters that are ideally suited for systems powered from a 1-cell Li-ion battery or from a 2- to 3-cell NiCd, NiMH, or alkaline battery. The TPS6200x operates typically down to an input voltage of 1.8 V, with a specified minimum input voltage of 2 V. The TPS6200x is a synchronous current-mode PWM converter with integrated – and P-channel power MOSFET switches. Synchronous rectification is used to increase efficiency and to reduce external component count. To achieve the 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 750 kHz, allowing the use of small inductor and capacitor values. The device can be synchronized to an external clock signal in the range of 500 kHz to 1 MHz. For low-noise operation, the converter can be operated in the PWM mode and the internal antiringing switch reduces noise and EMI. In the shutdown mode, the current consumption is reduced to less than 1 μA. The TPS62000 is available in the 10-pin (DGS) microsmall outline package (MSOP). The device operates over a free-air temperature range of -40℃ to 85℃. The TPS6200x is a step down converter operating in a current mode PFM/PWM scheme with a typical switching frequency of 750 kHz. At moderate to heavy loads, the converter operates in the pulse width modulation (PWM) and at light loads the converter enters a power save mode (pulse frequency modulation) to keep the efficiency high. The control loop is internally compensated reducing the amount of external components. The switch current is internally sensed and the maximum current limit can be set to typical 600 mA by connecting ILIM to ground.

• High-Efficiency Synchronous Step-Down Converter With Greater Than 95% Efficiency
• 2 V to 5.5 v Operating Input Voltage Range
• Adjustable Output Voltage Range From 0.8 V to v1
• Fixed Output Voltage Options Available in 0.9 V, 1 V, 1.2 V, 1.5 V, 1.8 V, 1.9 V, 2.5 V, and 3.3 V
• Synchronizable to External Clock Signal up to 1 MHz
• Up to 600 mA Output Current
• Pin-Programmable Current Limit
• High Efficiency Over a Wide Load Current Range in Power Save Mode
• 100% Maximum Duty Cycle for Lowest Dropout
• Low-Noise Operation
• Antiringing Switch and PFM/PWM Operation Mode
• Internal Softstart
• 30 μA Quiescent Current (TYP)
• Available in the 10-Pin Microsmall Outline Package (MSOP)
• Evaluation Module Available

• Low-Power CPUs and DSPs
• Cellular Phones
• Organizers, PDAs, and Handheld PCs
• MP-3 Portable Audio Players
• Digital Cameras
• USB-Based DSL Modems and Other Network Interface Cards