ELM624BA 0.9V Startup High Efficiency Synchronous Rectification PWM Boost DC/DC Converter
The ELM624BA provides a power solution for electronic devices that use 1-cell, 2-cell, or 3-cell alkaline batteries, nickel-hydrogen batteries, or 1-cell lithium-ion or lithium-polymer batteries. The output current varies based on the input-to-output voltage ratio; for example, it can achieve 5V/100mA output with a 1.2V input. It can start at a low voltage of 0.7V under light load. It employs a high-efficiency synchronous rectification current mode control pulse width modulation method. The output voltage can be programmed using external resistor voltage division. During shutdown, it stops circuit operation to minimize current consumption. In shutdown mode, the ELM624BA directly connects the battery input to the output, allowing the input battery to be used directly as a backup or real-time clock power source. The ELM624BA is available in a compact 6-pin SOT-26 package.
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basic information
• Direct connection between VIN and VOUT in shutdown mode • Switching frequency: 800kHz (4.7μH) • Low input voltage operation stop (UVLO): below 0.5V • Input voltage range: 2.5V to 5.5V • High efficiency: 92% • Supply current (internal circuit): 12μA • Startup input voltage/load: 0.9V/10mA, 0.7V/1mA • Operating input voltage: 0.9V to 5V • Switch current: 450mA max. • Package: SOT-26
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※The delivery time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
Application Examples Battery-powered portable devices: 1-3 cell alkaline batteries, NiMH - 1 cell lithium battery Solar cell applications Portable medical electronic devices Personal electronics devices
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Company information
In the IT devices where miniaturization and lightweight design have become standard, analog semiconductors are essential for realizing digital systems. Elm Technology has responded to various market needs with its compact and high-quality ICs under its own brand. Elm Technology operates from its headquarters in Tokyo, the Okinawa Technology Center, Elm High Tech (partner in Taiwan), and ELM Korea (local subsidiary), engaging in the design, development, and sales of ICs for AV equipment, PC peripherals, and various other applications. Additionally, we also develop custom ICs. 【Products Offered】 Logic ICs, operational amplifiers, voltage detectors, light sensors, high-speed logic ICs, DC-DC converters, voltage regulators, SPI flash memory, voltage comparators, DC-DC converter modules, special functions (LED drivers, laser diode drivers, IF detection ICs), bipolar transistors, MOSFETs (single power MOSFETs, dual power MOSFETs, complementary power MOSFETs).