资料介绍
The LM25007 is a monolithic step-down switching regulator
featuring all of the functions needed to implement a low cost,
efficient, power supply. Capable of driving a 0.5Amp load over
a 9V-42V input voltage range, this device is easy to apply and
is provided in the small MSOP-8 and the thermally enhanced
LLP-8 packages. Ultra-fast transient response is achieved
through the use of a constant on-time architecture with Vin
feed forward. This feature provides an almost constant operating
frequency over load and input voltage variations. The
operating frequency can be adjusted with a single resistor.
This architecture is easy to use and tolerant of component
selection. An intelligent current limit is implemented in the
LM25007 with forced off time that is inversely proportional to
Vout thus ensuring recovery from fault conditions. The output
voltage may be set from 2.5V to >30V. To improve efficiency
in light load applications, the Vcc pin can be connected to an
external voltage source to eliminate the drop through the internal
regulator. Additional features include: thermal shutdown,
Vcc under-voltage lockout, gate drive under-voltage
lockout, and max duty cycle limiter.
featuring all of the functions needed to implement a low cost,
efficient, power supply. Capable of driving a 0.5Amp load over
a 9V-42V input voltage range, this device is easy to apply and
is provided in the small MSOP-8 and the thermally enhanced
LLP-8 packages. Ultra-fast transient response is achieved
through the use of a constant on-time architecture with Vin
feed forward. This feature provides an almost constant operating
frequency over load and input voltage variations. The
operating frequency can be adjusted with a single resistor.
This architecture is easy to use and tolerant of component
selection. An intelligent current limit is implemented in the
LM25007 with forced off time that is inversely proportional to
Vout thus ensuring recovery from fault conditions. The output
voltage may be set from 2.5V to >30V. To improve efficiency
in light load applications, the Vcc pin can be connected to an
external voltage source to eliminate the drop through the internal
regulator. Additional features include: thermal shutdown,
Vcc under-voltage lockout, gate drive under-voltage
lockout, and max duty cycle limiter.
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