DC1868A

Demonstration circuit 1868A is a dual step-down DC/DC switching converter featuring the LTM®8024 μModule regulator. The demo board is designed to deliver dual 5V/3A and 3.3V/3A outputs from a 7V to 40V input. The Silent Switcher® architecture minimizes EMI while achieving high efficiency at frequencies up to 3MHz. The modes of operation (burst mode or discontinuous mode/SYNC) are jumper selectable. Burst mode operation improves efficiency at light loads. The LTM8024 is a fixed frequency PWM regulator with current mode control scheme. The switching frequency is set by an appropriate resistor (R11) from the RT pin to ground. The RUN pins (EN1/EN2 terminals) can be used to set the LTM8024 in micro power shutdown mode. The power good output of each channel (PG1 or PG2 terminal) will be low when that channel’s output voltage is outside of the ±7.5% regulation window.

• Typical switching frequency of 1MHz
• Typical efficiency, VOUT1 (5V) of 93.2% (VIN = 12V, IOUT1 = 3A)
• Typical efficiency, VOUT2 (3.3V) of 91.3% (VIN = 12V, IOUT2 = 3A)

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