This is a data brief about the STMicroelectronics PM6670AS-based evaluation board for DDR2/3 memory power supply controller. The board features a wide input voltage range of 4.5V to 36V, provides fixed output voltages of 0.9V (DDR2) or 1.5V (DDR3), adjustable output voltage range of 0.9V to 2.6V, and fast load transient response. It also includes features such as no current sensing, negative current limit, latched OVP, UVP, and thermal shutdown.
The STEVAL-ISA051V2 is a complete DDR2/3 memory power supply controller evaluation board designed for portable applications. It is based on the PM6670AS device and integrates a constant on-time buck controller, a low dropout regulator, and a buffered reference to meet JEDEC specifications.
The board supports input voltages from 4.5 V to 36 V and provides fixed output voltages of 1.8 V for DDR2 or 1.5 V for DDR3, with an adjustable range of 0.9 V to 2.6 V. Key features include very fast load transient response, negative current limiting, and support for all ceramic output capacitors.
| Input voltage range | 4.5 V to 36 V |
|---|---|
| Fixed output voltage (DDR2) | 1.8 V |
| Fixed output voltage (DDR3) | 1.5 V |
| Adjustable output voltage | 0.9 V to 2.6 V |
| Reference voltage | 0.9 V, ±1% |
| Soft-start time | 3 ms |
| Controller architecture | Constant on-time (COT) |
The input voltage range is 4.5 V to 36 V.
Yes, it supports both, providing 1.8 V for DDR2 or 1.5 V for DDR3.
The board supports all ceramic output capacitors.