DC2269A-A: 1V @ 13A + 1.8V @ 13A, 4.5 ~ 26.5 Vin, Dual Buck

Summary

Demonstration circuit 2269A-A is a dual-output, high efficiency, high density, µModule® supply on a small 1.5"×1.2" PCB board with 4.5V to 26.5V input range. Each output can supply 13A maximum load current. The demo board has a LTM4676 µModule regulator, which is a dual 13A or single 26A step-down regulator with PMBus power system management. The DC2269A can be easily inserted to an edge connector for testing and debugging. It has an optional input filter inductor (L1) to further reduce input ripple EMI noise.

DC2269A-A powers up to default settings and produce power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay™ onto your PC and use LTC's I2C/SMBus/PMBus dongle DC2086A together with DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.

Specifications

Manufacturer Analog Devices Inc.
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Multi Output
Eval Board Part Number DC2269A-A-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Board not Stocked
Topology Step Down
Outputs and Type 2 Non-Isolated
Voltage Out: Highest Current First 1V, 1.8V
Current Out 13A per Channel
Voltage In 4.5 ~ 26.5 V
Efficiency @ Conditions >93%, 5V in, 3.3V @ 1.8 ~ 13 A
>93%, 12V in, 5V @ 5 ~ 13 A
>92%, 5V in, 2.5V @ 2 ~ 13 A
>90%, 12V in, 3.3V @ 5.5 ~ 13 A
>88%, 5V in, 1.8V @ 2 ~ 13 A
>88%, 12V in, 2.5V @ 5.8 ~ 13 A
>87%, 5V in, 1.5V @ 2.5 ~ 13 A
>86%, 12V in, 1.8V @ 5 ~ 13 A
>85%, 5V in, 1V @ 2.5 ~ 9.3 A
>85%, 5V in, 1.2V @ 2 ~ 12 A
>84%, 12V in, 1.5V @ 5 ~ 13 A
>82%, 12V in, 1.2V @ 4.6 ~ 13 A
>80%, 12V in, 1.0V @ 5 ~ 12 A
Voltage Out Range 0.5 ~ 5.4 V
Features Current Limit (Adj. or Fixed)
Current Sharing
Fault Indication
GUI / Design Software
I²C Interface
Over Voltage Protection
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 500 kHz
Standby Current [Typical] 20 mA
Quiescent Current [Typical] 40 mA
Component Count + Extras 43 + 2
Internal Switch Yes
Design Author Linear Technology
Application / Target Market Memory Back-up
Servers
Telecom
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum]
Main I.C. Base Part LTM4676
Date Created By Author 2014-10
Date Added To Library 2018-04