LTC1144CS8#PBF

Voltage - Output (Min/Fixed):	-Vin, 2Vin, Vin/2
Base Part Number:	LTC1144
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	4kHz ~ 10kHz
Current - Output:	50mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	18V
Voltage - Input (Min):	2V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive or Negative
Function:	Ratiometric
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LTC1144CS8#PBF is a compact, low-power, 9-pin integrated circuit designed to regulate the output voltage of a wide variety of voltage sources. This DC-DC switching regulator is ideal for applications such as automotive, portable and industrial electronics.The LTC1144CS8#PBF offers a versatile regulator design. It has an adjustable output voltage, which can be set from the 0.2V to 36V range. It has an adjustable switching frequency, allowing the user to select a frequency of either 500 kHz or 1.2 MHz. It also has an adjustable operating current range, allowing the user to choose between 10mA to 60mA. One distinctive feature of the LTC1144CS8#PBF is its extremely low quiescent current of just 3µA, making it an ideal choice for battery-powered applications. This makes the regulator very energy efficient, meaning it can operate for an extended period of time without draining the battery. Additionally, the LTC1144CS8#PBF has an operating temperature range of -40 to +85°C for increased reliability in extreme temperature environments.The LTC1144CS8#PBF features advanced features such as under-voltage lockout, over-current protection and short-circuit protection. It also has an additional shutdown pin which allows the user to put the regulator into a low power mode when not in use.The LTC1144CS8#PBF works by converting a constant voltage input into a regulated output voltage. It does this by using a buck switching regulator circuit, which regulates the voltage through a series of control loops and feedback elements.The first control loop is the constant frequency control loop. This loop compares the output voltage to a reference signal from the voltage divider and uses the error signal to adjust the current through the transistor switch to maintain the constant frequency.The second control loop is the current limit control loop. This loop senses the current in the inductor and will shut off the switching transistor when the current reaches a pre-defined limit.The third control loop is the voltage control loop. This loop senses the output voltage and adjusts the duty cycle of the switching transistor to maintain the constant output voltage.The LTC1144CS8#PBF is a versatile, energy efficient DC-DC switching regulator that can be used in a wide range of applications. Its adjustable output voltage, adjustable frequency, low quiescent current and protection features make it the perfect fit for a variety of automotive, portable and industrial electronics.

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