LTC1159CG-5#TRPBF

Frequency - Switching:	Up to 250kHz
Base Part Number:	LTC1159
Supplier Device Package:	20-SSOP
Package / Case:	20-SSOP (0.209", 5.30mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	100%
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 40 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive or Negative
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LTC1159CG-5#TRPBF

The LTC1159CG-5#TRPBF is an adjustable monolithic buck-boost switching controller from Linear Technology. It features a wide input voltage operating range from 4.5V to 44V, independent input and output current limiting as well as a rich set of protections. With these features, the LTC1159CG-5#TRPBF can be used in a variety of applications, from automotive to industrial, from portable to consumer electronics. This article will discuss the application field and working principle of the LTC1159CG-5#TRPBF.

Application Field of LTC1159CG-5#TRPBF

The LTC1159CG-5#TRPBF is a high-performance dual buck-boost switching controller optimized for applications requiring an input/output voltage ratio or step-up/step-down ratio greater than 2:1. This makes the device ideal for applications such as automotive, industrial, portable, and consumer electronics.In automotive applications, the LTC1159CG-5#TRPBF can be used to power the vehicle’s lighting system and other auxiliary systems such as audio and video. It can also be used to provide power to the vehicle’s central control unit. In industrial systems, the LTC1159CG-5#TRPBF can be used to regulate system voltages and/or power multiple loads. In portable devices, the LTC1159CG-5#TRPBF can be used to power the device itself and its auxiliary systems.In consumer electronics, the LTC1159CG-5#TRPBF can be used to regulate the power supplies of different types of devices such as home appliances, computers, and gaming systems.

Working Principle of LTC1159CG-5#TRPBF

The LTC1159CG-5#TRPBF operates on a buck-boost topology. This topology enables the device to step up or down the input voltage depending on the required output voltage. The device utilizes two volts control signals – a voltage-mode control signal and a current-mode control signal – to generate two simultaneous, independent output voltages.The voltage-mode control signal can be used to set the output voltage of the device. It is generated by the internal voltage loop and has a range of +1.25V to -1.25V. On the other hand, the current-mode control signal is used to regulate the output current. It is generated by the internal current loop and has a range of -1.5V to +1.5V. The LTC1159CG-5#TRPBF combines these two control signals to drive a pair of internal MOSFET transistors. Depending on the ratio of input/output voltage or step-up/step-down ratio, the MOSFET transistors will either increase or decrease the output voltage. In addition, the LTC1159CG-5#TRPBF offers several integrated features that further simplify circuit design. These features include independent input and output current limiting, short-circuit and over-temperature protection, and an integrated soft-start circuit for controlled start-up.

Conclusion

The LTC1159CG-5#TRPBF is a high-performance monolithic buck-boost switching controller from Linear Technology. Its wide input voltage operating range, independent input and output current limiting, and rich set of protection features make it ideal for various applications from automotive to industrial, from portable to consumer electronic. In addition, the device utilizes a buck-boost topology to drive two internal MOSFET transistors that can step up or down the input voltage to the required output voltage.

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