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
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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
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Operating Temperature Range: -40℃
~85℃
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Demo Board Available
APPLICATIONS
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Power source for portable
communication equipment, cameras,
video instruments such as VCRs,
camcorders.
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Power source for battery-powered
equipment.
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Power source for household electrical
appliance
TYPICAL APPLICATION
BL8
BL8519
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