TPS60120
稳压 3.3V 高功率充电泵 DC/DC 转换器
The TPS6012x step-up, regulated charge pumps generate a 3.3-V or 3-V ±4% output voltage from a 1.8-V to 3.6-V input voltage two alkaline, NiCd, or NiMH batteries. They can deliver an output current of at least 200 mA 100 mA for the TPS60122 and TPS60123, all from a 2-V input. Four external capacitors are needed to build a complete high efficiency dc/dc charge pump converter. To achieve the high efficiency over a wide input voltage range, the charge pump automatically selects between a 1.5x or doubler conversion mode. From a 2-V input, all ICs can start with full load current.
The devices feature the power-saving pulse-skip mode to extend battery life at light loads. , TPS60122, and TPS60124 include a low battery comparator. TPS60121, TPS60123, and TPS60125 feature a power-good output. The logic shutdown function reduces the supply current to a maximum of 1uA and disconnects the load from the input. Special current-control circuitry prevents excessive current from being drawn from the battery during start-up. This dc/dc converter requires no inductors, therefore EMI is of low concern. It is available in the small, thermally enhanced 20-pin PowerPADTM package PWP.
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- High Average Efficiency Over Input Voltage Range Because of Special Switching Topology
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- Minimum 200-mA Output Current From an Input Voltage Range of 1.8-V to 3.6-V
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- Regulated 3.3-V or 3-V ±4% Output Voltage
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- No Inductors Required, Low EMI
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- Only Four External Components Required
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- 55-uA Quiescent Supply Current
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- 0.05-uA Shutdown Current
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- Load Disconnected in Shutdown
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- Integrated Low Battery and Power Good Detectors
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- Evaluation Module Available TPS60120EVM-142
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- Applications
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- Applications Powered by Two Battery Cells
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- Portable Instruments
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- Battery-Powered Microprocessor Systems
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- Miniature Equipment
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- Backup-Battery Boost Converters
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- PDAs, Organizers, Laptops
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- MP-3 Portable Audio Players
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- Handheld Instrumentation
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- Medical Instruments e.g., Glucose Meters
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- Cordless Phones
PowerPAD is a trademark of Texas Instruments Incorporated.