BL8519

BL8519 Built-in 2A Power MOSFET Step-down DC-DC Converter 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 90mΩ 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 BL8519 www.belling.com.cn 1 BL8519 ORDERING IN...