LT1054IS8#PBF

Introduction

The LT1054IS8#PBF, from Linear Technology, is a low noise and low distortion micropower step-down switching regulator. It is usually used for supplying power to systems that require a wide-input voltage range of 3V to 40V, a 1MHz switching frequency and any current up to 3A. This device provides excellent line and load regulation along with accurate output voltage setpoint, allowing the user to precisely regulate the output voltage to the desired voltage level without compromising performance.

Application Field

The LT1054IS8#PBF is widely used in a range of DC-DC applications, such as laptop power supplies, automotive applications, wireless communications, and industrial electronics. It is suitable for powering a variety of systems which need low power consumption, small component size and reliable power delivery. It can be used for servicing cell phones and other devices with an input voltage of 3 to 40V and an output current of up to 3A.

Key Features

• High efficiency up to 97%.
• No output capacitors are required.
• Low noise and ripple.
• 1MHz switching frequency.
• Wide input voltage range from 3V to 40V.
• Output current of up to 3A.
• Accurate voltage setpoint without compromising performance.
• Wide temperature range of -40°C to 85°C.
• Available in SOT-23-5 and other IC packages.

Working Principle

The LT1054IS8#PBF operates using a current-mode control architecture. It detects the switching current in the inductor and compares it with the traditional voltage-mode control. The current-mode control detects the period for the switch voltage when the peak current is reached. This period is then compared to the reference voltage and the duty cycle of the switch is modulated accordingly. The device also uses a synchronous rectification system, which converts the switch current from a diode AC waveform to a DC output voltage waveform.

Conclusion

The LT1054IS8#PBF DC-DC switching regulator from Linear Technology is a low noise and low distortion micropower regulator suitable for applications that require a wide-input voltage range of 3V to 40V, a 1MHz switching frequency, and any current up to 3A. It offers high efficiency and no output capacitors are required, making it ideal for providing reliable power delivery within a required temperature range.