FAN1086 Adjustable/Fixed LDO Linear Regulator Summary
The FAN1086 by Fairchild Semiconductor is a linear regulator designed for applications requiring low dropout voltages and robust load regulation. This component offers an adjustable or fixed voltage output, featuring low quiescent current for increased efficiency and robust built-in protections like current limiting and thermal limiting. It is available in standard SOT-223, TO-263, and TO-252 packages and supports a maximum input voltage of 7.5V with an operating junction temperature range from -65°C to 150°C.
Key Features
Low Dropout Voltage: This ensures stable operation even with minimal voltage differences between the input and output.
Load Regulation: Offers excellent regulation characteristics, with a typical specification of 0.05% ensures reliable performance under varying load conditions.
Current Limit: The device includes a trimmed current limit to ensure delivery of the specified output current and controlled short-circuit current.
Thermal Protection: On-chip thermal limiting serves to safeguard the device against excessive junction temperatures caused by overloads or high ambient conditions.
Applications
The FAN1086 is versatile and applicable in several areas, including but not limited to Active SCSI terminators, high-efficiency linear regulators, post regulators for switching supplies, battery chargers, and motherboard clock supplies. Its ability to convert 5V to 3.3V makes it particularly useful in modern digital applications.
Typical Use Case
A typical application circuit is provided demonstrating the FAN1086 in use: converting an input (Vin) of 3.3V to an output (Vout) of 1.5V at 1.5A with associated external components like capacitors for stabilization and resistors for setting output voltage in adjustable configurations.
Package Thermal Characteristics
The FAN1086 comes in several package options with thermal resistance as low as 3°C/W when mounted appropriately. The datasheet notes that thermal performance can be influenced by the mounting technique, and thus, thermal resistance can range from 30°C/W to over 50°C/W.
Absolute Maximum Ratings
Note that the device should not exceed a maximum input voltage of 7.5V, and it is designed to operate within a junction temperature range of -65°C to 150°C. For soldering, the lead temperature has a maximum of 300°C for 10 seconds.
References:
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