LTC1695CS5#TRMPBF

LTC1695 is a fan speed controller provides all the functions necessary for a power management microprocessor to regulate the speed of a 5V brushless DC fan via a 2-wire SMBus/I²C interface. Fan speed is controlled according to the system’s required temperature profile and permits lower fan power consumption, longer battery run time and lower acoustical generated noise versus systems that only provide simple on-off control for the fan. It incorporates a 180mA low dropout linear regulator, a 2-wire SMBus/I²C interface and a 6bit DAC. Fan speed is controlled by varying the fan’s terminal voltage through the output voltage of the device’s linear regulator. This device’s output voltage is programmed by sending a 6bit digital code to the device DAC via the SMBus. It is used in applications such as notebook computers, spot cooling, portable instruments, battery-powered systems, DC motor control, white LED power supplies, programmable low dropout regulator.

• P-channel on resistance is 0.75 ohm typ at (ILOAD = 150mA, TA = 25°C)
• Supply voltage range from 4.5V to 5V
• Supply current is 150.7mA typ at (VOUT = full scale, ILOAD = 150mA)
• Shutdown current is 80µA typ at (DAC code = 0, TA = 25°C)
• 1LSB resolution is 78mA typ at (ILOAD = 1mA, TA = 25°C)
• Offset error is ±1LSB max at (ILOAD = 1mA, TA = 25°C)
• Differential nonlinearity is ±0.75LSB max at (ILOAD = 1mA, TA = 25°C)
• Integral nonlinearity is ±0.75LSB max at (ILOAD = 1mA, TA = 25°C)
• SMBus operating frequency is 10KHz to 100KHz
• Operating temperature range from 0°C to 70°C, package style is 5-lead plastic SOT-23

Notes

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