The XRP7740 is a quad-output Pulse-Width Modulated (PWM) step-down DC-DC controller with a built-in LDO for standby power and GPIOs. The device provides a complete power management solution in one IC and is fully programmable via the included I2C serial interface. Independent Digital Pulse Width Modulator (DPWM) channels regulate output voltages and provide all required protection functions such as current limiting and overvoltage protection.
Each output voltage can be programmed from 0.9V to 5.1V without the need of an external voltage divider. The wide range of the programmable DPWM switching frequency (from 300 KHz to 1.5 MHz) enables the user to optimize between efficiency and component size. Input voltage range is from 6.5V to 20V. Two controllers support a load of up to 5A, while the other two controllers support up to 15A.
I2C bus interface is provided to program the IC as well as to communicate with the host for fault reporting and handling, power rail parameters monitoring, etc.
The device offers a complete solution for soft-start and soft-stop. The start-up delay and ramp of each PWM regulator can be independently controlled. The device can start up a pre-biased PWM channel without causing large negative inductor current.
The Exar Configuration Model XR77xxEVB-XCM-V80 interface board provides designers with a simple, quick and inexpensive means of evaluating and prototyping new designs using Programmable Universal PMIC devices with PowerArchitect4. This Evaluation Board is designed only for low volume engineering purposes; not production volumes. For production requirements commercial programmers must be used. The Evaluation Board is provided “as is and whereas” and without any warranty as to results, merchantability or purpose. Exar is not responsible for misuse of the Evaluation Board.
- Four switching buck (step-down) controllers each with internal FET drivers. Two controllers (2 & 4) support loads up to 15A; two controllers (1 & 3) support load up to 5A.
- 6.5V to 20V input voltage range – no additional voltage rails required
- Output voltages programmable from 0.9V to 5.1V
- Up to 6 reconfigurable GPIO pins
- Fully programmable via I2C interface
- Independent Digital Pulse Width Modulator (DPWM) channels with five coefficient PID control
- High integration: elimination of external circuits and components required for compensation, parameter adjustment and interface
- Programmable DPWM frequency range (300 kHz to 1.5 MHz) enables efficiency and component size optimization
- Complete power monitoring and reporting
- Independently controlled start-up delay and ramp for each regulator, including soft-start with a pre-biased load voltage
- Independently controlled soft-stop delay and ramp for each regulator with a programmable stop voltage
- Over temperature protection (OTP) and undervoltage lockout (UVLO); per-channel overcurrent protection (OCP) and overvoltage protection (OVP)
- Built-in LDO (configurable to 3.3V or 5V) with overcurrent protection
- Non-volatile memory for system configuration
- Evaluation Board and Configuration Module (XCM) are available for evaluation and development purposes only
- PowerArchitect™ Design and Configuration Software
- Third-Party Programming Support
Symbols and Footprints
- Computing: servers, storage systems
- Consumer: set-top box (STB), game systems
- Industrial: ATE, DC-DC converters, video processing
- Plasma display panel (PDP)
- Networking and telecommunications equipment
Parts & Purchasing
|Part Number||Pkg Code||RoHS||Min Temp||Max Temp||Status||Buy Now||Order Samples|
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
|07/11/2017||Product Discontinuation Notification||PDN_17-0623-01-1033.pdf|
|01/05/2017||Addition of an alternate qualified location, ANST, China.||PCN 16-0835-01 ANST-1033.pdf|
|10/15/2010||Package/Shipping Change: New carrier tape dimension. Standardization.||PCN_10-1011-01-1033.pdf|
Frequently Asked Questions
In this example, we looked for XRA1201. When you hover over it, it will turn grey and you can click anywhere in the grey box. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted in yellow above. The screen changes to:
Notice the status column and the “Show obsolete parts” link:
A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers:
Another method to find out if a part is OBS or EOL is to click on SUPPORT:
And then Product Change Notifications
Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:
If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.
Find the product page of the part that you want to get an evaluation board for and click on Parts & Purchasing. Example:
Find the icons under Buy Now or Order Samples:
Click on the Buy Now icon and see who has stock and click on the Buy button:
Alternatively, you can click on the Order Samples
If the icons are missing, then contact Customer Support.