Analog Devices LTC3876EUHF | Demoboard DC1631A

Description

Demonstration circuit 1631A is a dual output DDR2/3 power supply operating with a switching frequency of 400kHz over an input voltage range of 4.5V to 14V. The fixed on-time valley current mode control of the LTC®3876 allows for a fast load step response (see Figure 3). The load step response can be tested with the onboard load step circuit and a bench pulse generator.

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 1.5” × 1.0” area on the board. The package style for the LTC3876EUHF is a 38-pin 5mm × 7mm QFN with an exposed ground pad.

Features

• MODE jumper to program either discontinuous mode (DCM) or forced continuous mode (FCM) at light or no load.
• EXTVCC pin.
• PLLIN pin to synchronize the converter to an external clock.
• Remote sensing for VDDQ.
• RUN pin, PGOOD pin and TRACK/SS pin.

More information

• Datasheet
• IC product information