LTC2923IMS#PBF

LTC2923 is a power supply tracking controller. It provides a simple solution to power supply tracking and sequencing requirements. By selecting a few resistors, the supplies can be configured to ramp-up and ramp-down together or with voltage offsets, time delays or different ramp rates. By introducing currents into the feedback nodes of two independent switching regulators, this device causes their outputs to track without inserting any pass element losses. Because the currents are controlled in an open loop manner, this device does not affect the transient response or stability of the supplies. Furthermore, it presents a high impedance when power-up is complete, effectively removing it from the DC/DC circuit. It is widely used in application such as VCORE and VI/O supply tracking, microprocessor, DSP and FPGA supplies, servers, communication systems etc.

• Flexible power supply tracking
• Power supply sequencing
• Supply stability is not affected
• Controls two supplies without series FETs
• Controls a third supply with a series FET
• Adjustable ramp rates
• Electronic circuit breaker
• Input supply range is 2.9V to 5.5V
• Input supply current is 1.3mA typical at (IFBx = 0, ITRACKx = 0, TA = 25°C, 2.9V <lt/> VCC <lt/> 5.5V)
• Operating temperature is -40°C to 85°C, package style is 10-lead plastic MSOP

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