Analog Devices LTC3833EFE | Demoboard DC1516A-B

Description

Demonstration circuit 1516A is a 1.5V/15A synchronous buck converter operating with a switching frequency of 300kHz over an input voltage range of 4.5V to 24V. The demo board comes in two versions. The -A version usesinductor DCR current sensing with an iron powder inductor for highest efficiency. The -B version uses a 2.5mΩ/1% sense resistor for accurate current sensing with a low DCR ferrite inductor. The fixed on-time valley currentmode control of the LTC®3833 allows for a fast load step response (see Figures 4 and 5). The load step response can be tested with the on-board load step circuit and a bench pulse generator. Other features of the board include a MODE jumper to program either DCM or CCM with light or no load, a PLLIN input for synchronizing the converter to an external clock,a TRACK/SS pin, a PGOOD pin and an EXTVCC pin.The demo board uses a high density, two-sided drop-in layout. The entire converter, excluding the bulk output and input capacitors, fits within a compact 1.25" × 0.5" area on the board. The package style for the LTC3833EFE is a 20-lead TSSOP with an exposed ground pad.

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