LTC1046CN8#PBF

Voltage - Output (Min/Fixed):	-Vin, 2Vin, Vin/2
Base Part Number:	LTC1046
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	5.5kHz ~ 30kHz
Current - Output:	50mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	6V
Voltage - Input (Min):	1.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive or Negative
Function:	Ratiometric
Part Status:	Active
Packaging:	Tube

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LTC1046CN8#PBF Application Field and Working Principle

The LTC1046CN8#PBF is an integrated DC-DC Switching Regulator from Linear Technology that can be used for high efficiency power conversion. It is a monolithic switching converter with a wide input voltage range from 7V to 30V, and provides up to 0.5A of continuous current output. The IC utilizes a “charge pump” architecture which is similar to a boost converter, but allows for higher efficiency as the current can be either switched or held. This product is targeted for applications such as portable electronic devices, high current point of load (POL) applications, microprocessor core power supplies, and applications that require high power efficiency.

Application Field

The LTC1046CN8#PBF provides a high efficiency solution for a variety of power conversion applications. Its versatility makes it ideal for a range of applications, from portable devices to high current point of load (POL) applications.For portable devices, this integrated switch converter is an ideal solution for applications that require high efficiency and low power consumption, such as digital cameras and mobile phones. It enables these devices to extend their run-time, as it requires only a single integrated solution, eliminating the need for multiple components such as inductors and capacitors. In addition, the wide input voltage range from 7V to 30V can accommodate any power requirements, especially low voltage and portable appliications such as laptops, PDAs and digital cameras.For high current POL applications, the LTC1046CN8#PBF can provide up to 0.5A of continuous current. It can be used as a power source for microprocessors and other applications that require a reliable, high efficiency power supply. The low quiescent current of this IC also makes it an attractive choice for high current applications, as it reduces power consumption.

Working Principle

The LTC1046CN8#PBF operates on a “charge pump” principle. Essentially, the IC employs a capacitor to store energy and then releases it at a higher voltage. The IC operates as follows.When the input voltage increases, the current in the inductor (L1) increases. This causes the voltage across the inductor to increase, which in turn makes the voltage across the output capacitor (C1) increase as well. As the output capacitor starts to charge up, the current in the inductor (L1) decreases.Once the output voltage reaches its target level, the controller stops charging the output capacitor and the inductor current inverts to the negative side. The inductor current returns to its initial level and the switching cycle is thus complete.The key to the LTC1046CN8#PBF’s efficiency is the way in which the current is switched and held. Instead of continuously switching the current, the current is either switched or held, thus allowing the inductor to maintain a lower voltage at a higher efficiency. This makes the achievable efficiency of this device much higher than that of traditional boost converters.

Conclusion

The LTC1046CN8#PBF is an ideal solution for a variety of power conversion applications, ranging from portable devices to high current POL applications. It is capable of providing up to 0.5A of continuous current with high efficiency and low power consumption. The “charge pump” architecture of this device enables it to switch and hold current more efficiently than traditional boost converters, making it an attractive choice for applications that require high efficiency and low power consumption.

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