The XR77103 features three synchronous, wide input range, high efficiency buck converters. Each converter is digitally programmable requiring minimal external components thus providing the smallest size solution possible.
The converters can operate in 5V, 9V and 12V systems and have integrated power switches. The output voltage of each converter can be adjusted by programming the values in the VOUT setting registers through an I2C interface. The adjustable range is 0.8~6V with 50mV resolution. The output voltage can also be set externally using an external resistor divider. Output sequence among the outputs, soft-start time and the peak inductor current limit are also set through I2C.
The switching frequency of the converters can either be set with I2C or can be synchronized to an external clock. The switching regulators are designed to operate from 300kHz to 2.2MHz. Each converter operates in phase or out of phase according to the value in the phase setting register. This can minimize the input filter requirements.
XR77103 features a supervisor circuit that monitors each converter output. PGOOD pin is asserted once sequencing is done, all outputs are reported in regulation and the reset timer expires. The polarity of the signal is active high.
XR77103 also features a light load Pulse Skipping Mode (PSM). It is set through I2C. The PSM mode allows for a reduction on the input power supplied to the system when the host processor is in stand-by mode (low activity) mode.
- 4.5V to 14V wide input supply voltage range
- Built-in MOSFET and synchronous rectifier
- I2C programmable supplies
- Output voltage (0.8~6V)
- Power on sequence
- Soft-start timing
- Switching frequency (300kHz~2.2MHz)
- Individual current limit
- Optional power saving mode at light loads
- Non Volatile Memory (NVM) with up to 10,000 times write operation
- 0.8V, high accuracy reference (1%)
- Current-mode control with simple compensation circuit
- External synchronization
- Power good
- Thermal shutdown
- Overvoltage transient protection
- Overcurrent protection
- PowerArchitect™ Design and Configuration Software
- Third-Party Programming Support
- Evaluation Board, Demo Kit and Configuration Module (XCM) are available for evaluation and development purposes only
- 32-pin, 4 x 4mm TQFN package
- Pin-compatible non-programmable versions
Evaluation Board Schematics, Design Files & User’s Manual
- Low power FPGA and DSP supplies
- Video processor supplies
- Home gateways
- Telecommunications and infrastructure equipment
- Industrial control and automation
- Base stations, switches/routers
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.
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.