LTC3112IFE#TRPBF

Voltage - Output (Min/Fixed):	2.5V
Base Part Number:	LTC3112
Supplier Device Package:	20-TSSOP-EP
Package / Case:	20-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	750kHz
Current - Output:	2.5A
Voltage - Output (Max):	14V
Series:	--
Voltage - Input (Max):	15V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LTC3112IFE#TRPBF is a DC/DC step-down switching regulator component of Linear Technology, featuring low quiescent current, wide Input voltage range and the best total DC/DC regulation accuracy in the industry. It’s a high performance DC/DC buck regulator that provides a compact, fast time-to-market solution for on-board, “plug and play” devices requiring high current from low input voltages. LTC3112IFE#TRPBF provides excellent transient response and is integrated with a current-mode controlled internal oscillator for excellent loop stability.

Application Field and Working Principle

LTC3112IFE#TRPBF is a type of Peripheral Monitor and Interface Controllers (PMIC), Voltage Regulators and DC DC Switching Regulators. It can be used in applications such as power management of Automotive, industrial and Telecom systems, and also portable and battery-powered applications.The working principle of the LTC3112IFE#TRPBF is based on its integrated switching regulator. It is composed of two main stages: a pulse-width modulation (PWM) controller, an external switching transistor and an external compensation circuit.The PWM controller integrated in the LTC3112IFE#TRPBF provides current control on the output by regulating the on-resistance of the external MOSFET switch which is connected to the power stage.The current control loop uses a low side current sense resistor to detect the current in the output filter inductor. The controller also utilizes a wide range of frequency settings and clock dividers to adapt to different power stages, system loading requirements and desired output ripple.The external MOSFET switch is employed to convert the input voltage to a level suitable for the output stage and is used to drive the output filter inductor. The output filter inductor is sized to the desired inductance value for the loading conditions and output voltage ripple requirements.The external compensation circuit is used to maintain output regulation in the presence of varying load current conditions.

Benefits

The LTC3112IFE#TRPBF offers a number of benefits such as: 1. Low quiescent current (<1 mA) ideal for portable and battery-powered applications. 2. High efficiency up to 94.7% in most conditions. 3. Wide input voltage range (2.5V to 36V). 4. Best total DC/DC regulation accuracy at ±0.5% 5. Few external components required. 6. Integrated soft-start. 7. Integrated input current limiter. 8. Short circuit protection.

Conclusion

The LTC3112IFE#TRPBF is an excellent device of Linear Technology in the field of Peripheral Monitor and Interface Controllers, voltage regulators and DC DC switching regulators. Its unique design offers an excellent combination of low quiescent current, integrated input current limiter, short circuit protection and high total DC/DC regulation accuracy, making it the most efficient and suitable solution for power management in applications with high current and low input voltages.

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