LTC1515CS8-3/5#TRPBF

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The LTC1515CS8-3/5#TRPBF is a DC to DC switching regulator IC designed to support point-of-load (POL) voltage regulation applications. This low dropout (LDO) IC is based on a proprietary Constant-Off Time (COT) architecture that enables efficient, stable regulation with fast transient response. The thin small outline package (TSOP) with schematic pattern compatible to circuit boards with various sizes makes the component light weight and easy to mount.

Features:

• Patented COT architecture for fast transient response.
• Wide VIN range from 2.7V to 5.5V.
• Low dropout voltage – 1.2V typical at 1A.
• Typical efficiency of up to 95%.
• Output current protection.
• Both pin and on-chip thermal protection.
• TSOP-8 package.

Applications:

• Point-of-load voltage regulation.
• Processor core voltage regulation.
• High current output applications.
• Plug in DC supply voltage regulation.
• Logic voltage regulation.

Working Principle:

The LTC1515CS8-3/5#TRPBF works by using the Constant-off Time (COT) architecture. This architecture does not use the traditional Pulse-width Modulation (PWM) technique or the hysteretic one for voltage regulation. Instead, it uses an active off-time control method, which provides fast transient responses, high-ripple rejection, and lowoutput noise. The device controls the output voltage by controlling the amount of current used during the off-time cycles. The resistor R1 and capacitor C1 form a voltage dividerto detect the output voltage and provide a reference voltage to the IC. The reference voltage is compared to the feedback voltage of the output and depending on their disparity the IC adjusts its on-off times. The COT architecture ensures that the output voltage regulation is always independent of the load current and input voltage.

Conclusion:

The LTC1515CS8-3/5#TRPBF is an advanced DC to DC switching regulator IC designed to support voltage regulation applications. This low-dropout (LDO) IC is based on a proprietary Constant-Off Time (COT) architecture that allows for efficient, stable regulation with fast transient response. Its wide VIN range, efficient and low dropout voltage, output current protection and on-chip thermal protection make it ideal for many application and working environments.

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