LT1767EMS8E-1.8#PBF

Voltage - Output (Min/Fixed):	1.8V
Base Part Number:	LT1767
Supplier Device Package:	8-MSOP-EP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	1.25MHz
Current - Output:	1.5A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	25V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck, SEPIC
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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LT1767EMS8E-1.8#PBF Application Field and Working Principle

Introduction

The LT1767EMS8E-1.8#PBF is a high-efficiency, low-EMI switching regulator developed by Linear Technology (LT). This device is designed to provide up to 1.8V output voltage from a 2.2Vto 10V input voltage. It is suitable for single cell Li-Ion battery and input regulated, as well as automotive applications. The LT1767EMS8E-1.8#PBF is categorized into PMIC, Voltage Regulators, DC DC Switching Regulators.

Specifications

The LT1767EMS8E-1.8#PBF has a wide input voltage range of 2.2V to 10V, and an output voltage range of 0.50V to 1.8V. It provides an impressive efficiency of 95% at 1V and a maximum load current of 800mA. This device is integrated with three switching frequency options, namely 55kHz, 110kHz and 220kHz, which allow the user to operate the circuit in various applications. Furthermore, the LT1767EMS8E-1.8#PBF includes a pulse-by-pulse current limit and thermal shutdown protection.

Application Field

The LT1767EMS8E-1.8#PBF is a highly efficient and low-noise DC/DC switching regulator for applications such as communication and networking, computer systems, automotive, and Li-Ion battery powered portable products. This sophisticated device can provide up to 1.8V output even from an input voltage as low as 2.2V, and a maximum load current of 800mA. It is ideal for space limited applications as it offers a small footprint of 5.6mm x 4.9mm.

Working Principle

The LT1767EMS8E-1.8#PBF is a full-featured, high-efficiency switching regulator. This device works on the principle of synchronous rectification, in which transistors are driven simultaneously in both directions. The circuit consists of two MOSFETs, an inductor, and other active and passive components. The two MOSFETs act as controllable switches, and the inductor stores the energy supplied by the input voltage. The LT1767EMS8E-1.8#PBF operates at switching frequencies up to 220kHz, and it uses a control system for precision output voltage regulation. It also includes a feedback loop, which allows precise current and voltage control.

Conclusion

The LT1767EMS8E-1.8#PBF is a high-efficiency, low-noise DC/DC switching regulator designed for space-limited applications such as automotive, communication, and networking. It provides an impressive efficiency of 95% at 1V and a maximum load current of 800mA, while its input voltage range is between 2.2V to 10V. The LT1767EMS8E-1.8#PBF is integrated with three switching frequency options, namely 55kHz, 110kHz and 220kHz, a pulse-by-pulse current limit, and thermal shutdown protection. It is a robust and reliable device for applications requiring high efficiency and low noise.

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