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BL8519 Datasheet(PDF) 1 Page - SHANGHAI BELLING CO., LTD. |
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BL8519 Datasheet(HTML) 1 Page - SHANGHAI BELLING CO., LTD. |
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1 / 7 page  www.belling.com.cn 1 Built-in 2A Power MOSFET Step-down DC-DC Converter BL8519 DESCRIPTION BL8519 is a current mode PWM step-down DC-DC converter that has an internal 2A power switch. It has a wide input voltage range of 3.6V to 20V, which make it suitable for regulating a wide variety of power sources. BL8519 is made up of a PWM control circuit, a reference voltage unit, an error amplifier, a protection circuit, Chip Enable circuit, and under voltage lockout circuit. A low ripple high efficiency step-down DC-DC converter can be easily assembled by this IC with minimum external components: an inductor, a diode, capacitors and resistors. Desired output voltage can be achieved by adjusting the value of external resistors. The BL8519 has cycle-by-cycle current limit circuitry; current limiting provides protection against shorted output. The low current (<5uA) shutdown provides complete output disconnect, enabling easy power management in battery powered systems. FEATURES ◆ ◆ ◆ ◆ Range of Input Voltage: 3.6V~20V ◆ ◆ ◆ ◆ Built-in 90m Ω Power MOSFET ◆ ◆ ◆ ◆ <5µA Shutdown Current ◆ ◆ ◆ ◆ Oscillation Frequency: 500KHz ◆ ◆ ◆ ◆ High efficiency: 90% ◆ ◆ ◆ ◆ 2.5A Peak Current Limit Cycle by Cycle ◆ ◆ ◆ ◆ Operating Temperature Range: -40℃ ~85℃ ◆ ◆ ◆ ◆ Demo Board Available APPLICATIONS ◆ ◆ ◆ ◆ Power source for portable communication equipment, cameras, video instruments such as VCRs, camcorders. ◆ ◆ ◆ ◆ Power source for battery-powered equipment. ◆ ◆ ◆ ◆ Power source for household electrical appliance TYPICAL APPLICATION BL BL BL BL8 88 8519 519 519 519 |
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