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LM3100,pdf datasheet (Synchron
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大小:551 |
2009-09-29
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The LM3100 Synchronously Rectified Buck Converter features
all functions needed to implement a highly efficient, cost
effective buck regulator capable of supplying 1.5A to loads
with voltages as low as 0.8V. Dual 40V N-Channel synchronous
MOSFET switches allow for low external component
thus reducing complexity and minimizing board space.
The LM3100 is designed to work exceptionally well with ceramic
and other very low ESR output capacitors. The Constant
ON-Time (COT) regulation scheme requires no loop
compensation, results in fast load transient response, and
simplifies circuit implementation. Through the use of a unique
design the regulator does not rely on output capacitor ESR
for stability, as do most other COT regulators. The operating
frequency remains nearly constant with line and load variations
due to the inverse relationship between the input voltage
and the on-time. The oprating frequency can be externally
programmed up to 1MHz. Protection features include VCC under-
voltage lockout, thermal shutdown and gate drive undervoltage
lockout. The part is available in a thermally enhanced
eTSSOP-20 package
all functions needed to implement a highly efficient, cost
effective buck regulator capable of supplying 1.5A to loads
with voltages as low as 0.8V. Dual 40V N-Channel synchronous
MOSFET switches allow for low external component
thus reducing complexity and minimizing board space.
The LM3100 is designed to work exceptionally well with ceramic
and other very low ESR output capacitors. The Constant
ON-Time (COT) regulation scheme requires no loop
compensation, results in fast load transient response, and
simplifies circuit implementation. Through the use of a unique
design the regulator does not rely on output capacitor ESR
for stability, as do most other COT regulators. The operating
frequency remains nearly constant with line and load variations
due to the inverse relationship between the input voltage
and the on-time. The oprating frequency can be externally
programmed up to 1MHz. Protection features include VCC under-
voltage lockout, thermal shutdown and gate drive undervoltage
lockout. The part is available in a thermally enhanced
eTSSOP-20 package
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