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SY5951
500nA ultra-low IQ current flowing into the VOUT pin 60nA ultra-low IQ current flowing into the VIN pin Operating input voltage range is 0.7V to 5.5V Adjustable output voltage range is 1.8V to 5.5V Fixed output voltage version available Minimum switch peak current limit is 0.8A Regulated output voltage in buck mode Truly disconnected during shutdown Integrated charge overvoltage protection Efficiency up to 75% at 10µA load when using the fixed output voltage version Efficiency up to 93% at 10mA to 300mA load WLCSP-6 and DFN-6 packages are used
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- Product Description
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- Commodity name: SY5951
- 封装: WLCSP-6、DFN-6
- 品牌: Siyuan Semiconductor
500nA ultra-low IQ current flowing into the VOUT pin 60nA ultra-low IQ current flowing into the VIN pin Operating input voltage range is 0.7V to 5.5V Adjustable output voltage range is 1.8V to 5.5V Fixed output voltage version available Minimum switch peak current limit is 0.8A Regulated output voltage in buck mode Truly disconnected during shutdown Integrated charge overvoltage protection Efficiency up to 75% at 10µA load when using the fixed output voltage version Efficiency up to 93% at 10mA to 300mA load WLCSP-6 and DFN-6 packages are used
The SY5951 is a synchronous boost converter with an ultralow static current of 1µA. The device is specifically designed for products powered by alkaline batteries, NiMH rechargeable batteries, lithium manganese batteries, or lithium-ion rechargeable batteries, enabling efficient operation under light load conditions, which is crucial for extending battery life.
The SY5951 boost converter achieves maximum efficiency with the lowest possible static current. The device consumes 1µA of static current under light load conditions; when the load is 10µA and with a fixed output voltage version, it can achieve an efficiency of up to 75%. The device has an output current of up to 300mA during 3.3V to 5V conversion, and can achieve an efficiency of up to 93% under a 200mA load.
The SY5951 also provides buck mode and pass-through mode for different applications. In buck mode, the output voltage can still be adjusted to the target value even if the input voltage is higher than the output voltage. In pass-through mode, the output voltage changes with the input voltage. When VIN>VOUT+0.5V, the SY5951 exits buck mode and enters pass-through mode.
In the disabled state, the SY5951 can disconnect the load from the input power supply, achieving true shutdown and thus reducing current consumption.
The SY5951 is available in WLCSP-6 and DFN-6 packages.
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