LT1425IS#PBF

Voltage - Output (Min/Fixed):	--
Base Part Number:	LT1425
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 100°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	285kHz
Current - Output:	135mA (Switch)
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	20V
Voltage - Input (Min):	2.8V
Number of Outputs:	1
Output Type:	--
Topology:	Flyback
Output Configuration:	Positive or Negative, Isolation Capable
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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Introduction of DC DC Switching Regulators

DC DC switching regulators are a kind of integrated circuits that have the ability to convert a dc input voltage into an adjustable dc output voltage. While the actual components used may vary, the switch mode power supply (SMPS) is generally composed of a MOSFET (metal-oxide-semiconductor field-effect transistor) switch, control circuit, transformed and filter circuits.The purpose of DC DC switching regulators is to regulate and control the voltage supplied to the load and provide a constant, regulated DC voltage for the application. The device is capable of either buck to convert higher input voltage to lower output voltage or boost to convert a lower input voltage to a higher output voltage.

Application Field and Working Principle of LT1425IS#PBF

The LT1425IS#PBF is the family of DC DC switching regulator, it features a wide input voltage range of 0.8V to 7V, 36V max surge and adjustable output voltage that can be set as low as 0.8V. The LT1425IS#PBF is a fast response, high efficiency and low noise DC to DC step down converter that has a high power switching frequency of up to 2MHz.The LT1425IS#PBF is suitable for powering low voltage dc loads in handheld electronic devices such as automotive applications, diagnostic or measuring instruments, or other applications. Its main advantage is the wide input voltage range which includes support for Li-ion or alkaline batteries.The LT1425IS#PBF has a switching frequency of 2MHz for step down configuration, which allows it to provide fast transient response, high efficiency and low output ripple. It also features a wide operating temperature range from -40°C to 85°C, enabling it to be used in harsh temperature environments.The LT1425IS#PBF can be configured as both a buck or boost converter, according to the requirement. It also offers power save feature which can turn off the output when the load current is below 10% of the rated output current, maximizing battery life.The working principle of the LT1425IS#PBF is simple and straightforward. The input voltage is first stepped down (or boosted) by a MOSFET switch and regulated using a control circuit. The output voltage is then filtered and regulated using a transformed and filter circuits. The feedback loop creates the output voltage, and the control circuitry modulates the switching frequency based on the output voltage.

Conclusion

In conclusion, the LT1425IS#PBF is a DC DC switching regulator that is suitable for a wide range of applications in handheld electronic devices such as automotive applications, diagnostic or measuring instruments, or other applications. The device its wide input voltage range, high power switching frequency, fast transient response, high efficiency and low noise output make it an ideal choice for powering low voltage dc loads in harsh environmental conditions.

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