LTC1159CS-5#PBF

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The LTC1159CS-5#PBF is part of the voltage regulators and DC DC switching controllers lineup available from Linear Technology. This device is a 5-bit digital power controller which is similar to their LTC1158 series but with more digital control lines and flexibility. The device works by regulating an input voltage to the desired output voltage to provide a stable output power supply.

The LTC1159CS-5#PBF has four digital control lines to incrementally step the output voltage. Two of the four lines, Voltage Input (VI) and Output Voltage Index (OVI), set the output voltage. These lines must be powered externally and are pulled low to indicate the desired output voltage. The other two lines, Enable (EN) and Zero Enable (ZE) are used to power the device and to enable/disable the output. ZE can also be used to set the output to zero for startup or for power stage bypass.

The LTC1159CS-5#PBF integrates four low on-resistance MOSFETs as power switches, allowing it to operate with high current and efficiency. The device features a built-in switching frequency of 300kHz, with the option to reduce or increase this frequency up to 500kHz or 100kHz, allowing for a fast response time and transient support.

The LTC1159CS-5#PBF is suitable for a variety of applications including but not limited to the regulation of DDR3 SDRAM, VoIP phones, and point-of-load systems. The device’s flexibility and low control voltage allow it to perform across a wide range of input and output voltages. It is also available in RoHS compliant and small MSOP-8/SOIC-8 package formats, making it suitable for space-limited applications.

In summary, the LTC1159CS-5#PBF is a programmable digital power controller integrated with four low on-resistance MOSFETs for controlling an input voltage to the desired output voltage. With its flexibility, control voltage, and small package formats, the device is well suited for applications in DDR3 SDRAM, VoIP phones, and other point-of-load systems.

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