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All One-Cell
All One-Cell
Two-Cell and Three-Cell Alkaline
NiCd
NiMH and Single-Cell
Li Batteries
Hand-Held Devices
WLED Flash Light
True Load Disconnection During Shutdown
True Load Disconnection During Shutdown
Internal Synchronous Rectifier
Up to 96% Efficiency
Current Mode PWM Operation with Internal Compensation
Low Start-Up Voltage
Low Quiescent Current
Internal Soft-Start Control
Low Battery Comparator
Low EMI Converter (Anti-Ringing)
Power Save Mode for Improved Efficiency at Light Load Current
Over Current Protection
Short Circuit Protection
Over Temperature Protection
Over Voltage Protection
Small WDFN-10L 3x3 Package
RoHS Compliant and Halogen Free
Synchronous Boost Converter with Voltage Detector
The RT9276 is a synchronous boost converter, which is based on a fixed ,frequency Pulse-Width-Modulation (PWM) controller using a synchronous rectifier ,to obtain maximum efficiency. The converter provides a power supply solution ,for products powered by a variety of batteries such as single cell, dual cell ,alkaline, NiMH and NiCd battery. At light load currents, the converter enters ,power save mode to maintain a high efficiency over a wide load current range.,The output voltage can be programmed by an external resistor divider, or fixed ,at a certain voltage. Moreover, the converter can be disabled to minimize ,battery drain. During shutdown, the load is completely disconnected from the ,battery. The maximum peak current in the boost switch is limited to 2A for ,current limit.,For the RT9276, a low-EMI mode is implemented to reduce ringing of the ,inductor phase pin when the converter enters discontinuous conduction mode. ,Moreover, a voltage detector is built-in in the chip for low battery detection.,,
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