Design contains obsolete parts

EVB-EN5367QI: 1 ~ 2.25V @ 6A, 2.5 ~ 5.5V in, Buck

Summary

This evaluation board user guide applies to EN5367QI. The EN5367QI is a 6A device. In addition to this document, you will also need the latest device datasheet.

The EN5367QI features integrated inductor, power MOSFETS, controller, a bulk of the compensation network, and protection circuitry against system faults. This level of integration delivers a substantial reduction in footprint and parts count over competing solutions. The evaluation board is optimized for engineering ease of testing through programming options, clip leads, test points etc.

The EN5367QI features a customer programmable output voltage by means of a resistor divider. The resistor divider allows the user to set the output voltage to any value within the range 0.75V to (VIN-VDROPOUT). The evaluation board, as shipped is populated with a 4 resistor divider option. The upper resistor is fixed and has a phase lead capacitor in parallel. One of 4 lower resistors is selected with the jumper option for different output voltages to change VOUT, retain the upper resistor and capacitor values and change only the lower resistor.

This device has no over-voltage protection feature. If making modifications to the board, we strongly recommend the customer to ensure the feedback loop is truly closed before powering up the device especially if the load cannot withstand the input voltage.

The input and output capacitors are X5R or X7R multi-layer ceramic chip capacitors. The Soft-start capacitor is a small 47nF X7R MLCC. Pads are available to have multiple input and output capacitors. This allows for evaluation of performance over a wide range of input/output capacitor combinations.

The jumper labeled LLM/SYNC pin controls the SYNC pin. LLM (light-load mode) function is not available on this part. This pin should be pulled LOW if the SYNC function is not to be used. Do not leave this pin floating or high.

The jumper labeled VDROOP should be left grounded. This function is not available on this part.

Specifications

Manufacturer	Enpirion
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	544-2931-ND
Eval Board Supplier	Altera
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1 V 1.2 V 1.55 V 2.25 V
Current Out	6 A
Voltage In	2.5 ~ 5.5 V
Efficiency @ Conditions	>89%, 5V in, 3.3V @ 1.3 ~ 6 A >88%, 5V in, 2.5V @ 1.3 ~ 6 A >88%, 3.3V in, 2.5V @ 0.5 ~ 6 A >85%, 3.3V in, 1.8V @ 0.8 ~ 6 A >82%, 5V in, 1.8V @ 1.4 ~ 6 A >80%, 3.3V in, 1.2V @ 0.8 ~ 6 A >79%, 5V in, 1.2V @ 1.2 ~ 6 A >78%, 3.3V in, 1.0V @ 0.8 ~ 6 A >75%, 5V in, 1.0V @ 1.2 ~ 6 A
Voltage Out Range	0.75 ~ 4.9 V
Features	Over Current Protection Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	4 MHz
Standby Current [Typical]	100 µA
Quiescent Current [Typical]	- Not Given
Component Count + Extras	24 + 16
Internal Switch	Yes
Design Author	Altera
Application / Target Market	Computers Factory Automation FPGA / DSP / Processors Point of Load (PoL) Printer, Plotter RF: Base Stations Servers
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	- Not Given
Main I.C. Base Part	EN5367QI
Date Created By Author	2013-10
Date Added To Library	2017-06