PM6670AS is a complete DDR2/3 power supply regulator for portable applications designed to meet JEDEC specifications
The document provides a comprehensive guide for using the PM6670AS, a constant on-time buck controller with integrated LDO and reference voltage designed for portable applications. It details the demonstration kit schematic, component assembly, and layout requirements.
The note covers configuration options via jumpers (MODE, DDRSEL, DSCG, COMP), power-up and power-down sequences, and evaluation tests including load regulation, transient response, efficiency, and protection features like UVLO, OVP, and thermal shutdown.
| Input voltage range | 4.5 V to 36 V |
|---|---|
| VDDQ output voltages | 1.8 V (DDR2) or 1.5 V (DDR3) |
| Adjustable output voltage | 0.9 V to 2.6 V |
| VTT LDO peak current | 2 A |
| Reference voltage (VTTREF) | +15 mA low-noise buffered reference |
| Soft-start time | 3 ms |
The device provides fixed output voltages of 1.8 V for DDR2 or 1.5 V for DDR3.
The controller supports an input voltage range from 4.5 V to 36 V.
Yes, all ceramic output capacitor applications are supported for both the switching section and reference voltages.