LT1576CS8

Voltage - Output (Min/Fixed):	1.21V
Base Part Number:	LT1576
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz
Current - Output:	1.5A
Voltage - Output (Max):	23.5V
Series:	--
Voltage - Input (Max):	25V
Voltage - Input (Min):	5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Discontinued at Digi-Key
Packaging:	Tube

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Introduction

The LT1576CS8 is an advanced voltage-mode DC/DC step-down switching regulator from Linear Technology. It uses a low-dropout linear regulator to perform the functions of both a switching regulator and a linear regulator. It has several features and benefits, including small size, low quiescent current, and simple configuration.

Application Field

The LT1576CS8 is suitable for a wide range of different applications, including high-efficiency DC-DC conversion in a variety of battery powered applications. Its adjustable output range makes it especially suitable for power management in battery applications where multiple output voltages are required. Its integrated thermal protection allows it to be used in high temperature applications, such as automotive and medical devices. Its fast transient response and wide input voltage range make it ideal for industrial or networking applications.

Working Principle

The LT1576CS8 is a DC/DC switching regulator that converts an input voltage to a desired output voltage. It utilizes a step-down topology to achieve efficient power conversion. An inductor stores energy and a power switch cycles between on and off states, transferring energy from the input to the output when on and storing energy in the inductor when off. A low-Dropout regulator is used to regulate the output voltage and provide load current.The LT1576CS8 utilizes a voltage-mode control loop to regulate the output voltage. A current-sense amplifier senses the output current and a PWM generator generates control signals based on the current sense amplifier output. These signals are used to control the power switch, which alternates between on and off states to regulate the output voltage. This voltage-mode control loop provides fast response, low output voltage ripple, and current-limit protection.

Conclusion

The LT1576CS8 is an advanced voltage-mode DC/DC switch-mode power converter from Linear Technology. It is suitable for a wide range of different applications, including high efficiency DC-DC conversion in battery powered applications. It employs a voltage-mode control loop for fast response, low voltage ripple, and current-limit protection. The adjustable output range makes it especially suitable for power management in battery applications where multiple output voltages are required.

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