| Part Number | PM6641 |
| Manufacturer | STMicroelectronics |
| Title | Monolithic VR for chipset and DDR2/3 supply |
| Description | The PM6641 is a monolithic voltage regulator module specifically designed to supply DDR2/3 memory and chipset in ultra-mobile PC and real estate c... |
| Features |
■ 0.8 V ±1 % internal voltage reference V to 5.5 V input voltage range Fast response, constant frequency, current mode control Three independent, adjustable, out-of-phase SMPS for DDR2/3 (VDDQ) and chipset supply Low noise DDR2/3 reference (VTTREF) ±2 Apk LDO for DDR2/3 termination (VTT) with foldb... |
| File Size | 2.28MB |
| Datasheet |
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PM6644 : The PM6644 is a 350 mA valley current limit stepdown regulator capable of delivering an adjustable output voltage in the range between 0.9 V and 8 V. A fixed value of output voltage is also available (3.47 V), saving the external resistor divider. It is housed in a small DFN10 3x3 package. The switching regulator is based on COT (constant-on-time) architecture, that assures fast load transient response; the embedded voltage feed-forward provides nearly constant switching frequency operation. The pulse skipping technique increases efficiency at very light load. The switching frequency can be adjusted from 200 kHz to 600 kHz through a simple resistor. The Table 1. Device summary Part number PM.