Demonstration circuit 2055A is a high efficiency, high density, 4-phase synchronous buck converter with a 4.5V to 14V input voltage range. It can supply up to 120A of load current with a 1.0V output. This demo board has two each LTC®3875EUJ feature-rich dual-phase synchronous current mode buck controllers with very low DCR current sensing capability, on-chip drivers and remote output voltage sensing. This board is set up with 0.32mΩ DCR output inductors. The temperature compensation function can guarantee accurate current limit over a wide temperature range with DCR sensing.
The LTC3875 is suitable for inputs from 4.5V to 38V and outputs up to 3.5V. It can provide a high efficiency, high power density and versatile power solution for telecom and datacom systems, industrial, medical instruments, and DC power distribution. The LTC3875 is available in a 40-lead 6mm × 6mm QFN package.
To shut down the converter, set the RUN pin voltage below 1.0V (SW1 and SW2: both OFF). Use JP1 jumper to select Burst Mode® operation, pulse-skipping mode or forced continuous mode operation at light load. The switching frequency is pre-set at about 400kHz, and it can be easily modified from 250kHz to 720kHz. An onboard dynamic circuit is also available for a load transient test. Please see LTC3875 data sheet for more detailed information.
Manufacturer | Analog Devices Inc. |
---|---|
Category | AC/DC and DC/DC Conversion |
Sub-Category | DC/DC SMPS - Single Output |
Eval Board Part Number | DC2055A-ND |
Eval Board Supplier | Analog Devices Inc. |
Eval Board |
Normally In Stock
|
Topology |
Step Down
|
Outputs and Type |
1 Non-Isolated
|
Voltage Out: Factory Set |
1 V
|
Current Out |
120 A
|
Voltage In |
4.5 ~ 14 V
|
Efficiency @ Conditions |
>87%, 12V in, 1.0V @ 21 ~ 120 A
|
Voltage Out Range |
0.6 ~ 5 V
|
Features |
Current Limit (Adj. or Fixed)
Over Voltage Protection Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Voltage Reference Voltage Tracking |
Switching Frequency |
250 ~ 720 kHz
|
Standby Current [Typical] |
40 µA
|
Quiescent Current [Typical] |
7 mA
|
Component Count + Extras |
41 + 161
|
Internal Switch |
No
|
Design Author |
Linear Technology
|
Application / Target Market |
Power: Auxiliary Power Supply
RF: Metering Servers Telecom |
Standby Current [Maximum] |
60 µA
|
Quiescent Current [Maximum] |
10 mA
|
Main I.C. Base Part |
LTC3875
|
Date Created By Author | 2013-11 |
Date Added To Library | 2017-01 |