Selecting a power supply IC for an FPGA requires an understanding of the power requirements of the FPGA. One of the requirements that must be met is the power supply sequence. If the power supply design does not meet this requirement, a large current may flow inside the FPGA, causing malfunctions and even damaging the device. In addition, each power supply in an FPGA behaves differently, so you must select the appropriate power supply IC. Rohm has released a power management solution that simplifies the selection of such power supplies, utilizing OTP (One Time Programmable memory) to enable easy configuration of output voltage, protection circuit settings, and rise and fall sequences. High current is supported by an external driver MOS, which can be controlled as a virtual single chip by intercommunication between chips.
Scalable PMIC
Combination of Chips to support various SoCs and FPGAs
Main PMIC
DCDC×2ch 2A
DCDC×2ch 4A
LDO×3ch 0.3A
Functional Safety features
Sub PMIC
DCDC×2ch 5A
Additional output, Safety architecture
Driver MOS
10A～20A output
Temperature feedback
Current feedback
Large current for high power system
Main PMIC OTP setting for Artix7 and Spartan7
Output voltage of each CH
Buck1: 1.8V
Buck2: 1.35V
Buck3: 1.0V
Buck4: 3.3V
LDO5: 1.2V
LDO6: 2.5V
LDO7: 3.3V
POWER ON sequence
Buck3→Buck1→Buck2→LDO5→LDO6→LDO7→Buck4
POWER OFF sequence
Buck4→LDO7→LDO6→LDO5→Buck2→Buck1→Buck3
Target Applications
- Surveillance camera
Image processing and video applications - I/F for machine vision
- Motor control system applications
- Industrial network
- Various sensor applications
Design data download
Power Block Diagram
Scalable PMIC
| Product | Summary |
|---|---|
| BD96801 Series | 2ch Buck Regulator (2A), 2ch Buck Regulator (4A), 3ch LDO(0.3A) |
| BD96802 Series | 2ch Buck Regulator (5A) |
| BD96340MFF-C | MOS FETDriver (20A, Peak 30A) |
Artix 7 Board Parts
| Product | Summary | Download |
|---|---|---|
| BD96801Q30-C | Artix-7 setting OTP, 2ch Buck Regulator (2A), 2ch Buck Regulator (4A), 3ch LDO(0.3A) | Data sheet |
| BD9C5A1EFJ | 4.5V to 18V Input, 5A Integrated MOSFET Single Synchronous Buck DC/DC Converter | Data sheet |
| BD353A0FJ | Termination Regulator for DDR-SDRAMs | Data Sheet |
| BD93F10MWV | USB Type-C Power Delivery Controller | |
| BR24T01F-W | 1KBit, I2C BUS, Low Power Serial EEPROM |
Recommended OTP Setting
|
Spartan-7 |
XC7S6 |
XC7S15 |
XC7S25 |
XC7S50 |
XC7S75 |
XC7S100 |
|
OTP Setting |
Type 1 |
Type 1 |
Type 1 |
Type 1 |
Type 1 |
Type 1 |
|
Artix-7 |
XC7A12T |
XC7A15T |
XC7A25T |
XC7A35T |
XC7A50T |
XC7A75T |
XC7A100T |
XC7A200T |
|
OTP Setting |
Type 1 |
Type 1 |
Type 1 |
Type 1 |
Type 1 |
Type 1 |
Type 2 |
Type 2 |
Type 1
