LTM4636-1

Demonstration circuit DC2448A-D features a PolyPhase^® design using the LTM4636-1EY, a 40A high efficiency, switch mode step-down power µModule^® regulator with overvoltage and overtemperature protection features. The input voltage range is from 9V to 15V. The output voltage range is 0.6V to 3.3V. The DC2448A-D can deliver a nominal 160A output current. DC2448A-D has on-boardhot swap circuit that can disconnect input supply and protect the LTM4636-1 and the load under overvoltage and overtemperature conditions. As explained in the data sheet, output current derating is necessary for certain V_IN, V_OUT and thermal conditions. The board operates in continuous conduction mode in heavy load conditions.

For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM4636-1 to synchronize to an external clock signal. DC2448A-D has the option of choosing both internal and external compensation circuits for LTM4636-1. The LTM4636-1 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2448A-D.

Demonstration circuit 2230A-B features the LTM4636-1EY, a 40A high efficiency, switch mode step-down power μModule^® regulator with overtemperature and input/output overvoltage protection. The input voltage range is from 4.7V to 15V. For a 4.7V to 5.5V input voltage range, short PV_CC pin to the V_IN pin with R8 = R21 = 0Ω and remove R17. The output voltage range is 0.6V to 3.3V. Derating is necessary for certain V_IN, V_OUT, frequency and thermal conditions. The board operates in continuous conduction mode with heavy load conditions. For high efficiency at low load currents, the MODE_PLLIN jumper selects pulse-skipping mode for noise sensitive applications or Burst Mode^® operation in less noise sensitive applications. The MODE_PLLIN pin also allows the LTM463-16 to synchronize to an external clock signal. DC2230A-B has the option of choosing either internal or external compensation circuit for the LTM4636-1. Tying the PHASMD pin to a different voltage generates a certain phase difference between the MODE_PLLIN and CLKOUT pins. The LTM4636-1 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2230A-B.