LT1185IQ#PBF

LT1185 is a low dropout regulator. This device uses a saturation-limited NPN transistor as the pass element. This device gives the linear dropout characteristics of a FET pass element with significantly less die area. High efficiency is maintained by using special anti-saturation circuitry that adjusts base drive to track load current. The “on resistance” is typically 0.25Ω. Accurate current limit is programmed with a single 1/8W external resistor, with a range of zero to three amperes. A second, fixed internal limit circuit prevents destructive currents if the programming current is accidentally overranged. Shutdown of the regulator output is guaranteed when the program current is less than 1µA, allowing external logic control of output voltage. This device has all the protection features of previous LTC regulators, including power limiting and thermal shutdown.

• Dropout voltage is 0.75V at 3A
• Reference voltage is ±1%
• Accurate programmable current limit
• Shutdown capability, internal reference available
• Full remote sense, good high frequency ripple rejection
• Low quiescent current is 2.5mA typ
• Operating junction temperature is –40°C to 125°C
• Package style is 5-lead plastic DD

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party