PM6644TR
ActiveSWITCHING VOLTAGE REGULATORS 350 MA ADJ STEP-DOWN 4.5 TO 25V -40, 150
PM6644TR
ActiveSWITCHING VOLTAGE REGULATORS 350 MA ADJ STEP-DOWN 4.5 TO 25V -40, 150
Technical Specifications
Parameters and characteristics for this part
| Specification | PM6644TR |
|---|---|
| Current - Output | 350 mA |
| Frequency - Switching [Max] | 600 kHz |
| Frequency - Switching [Min] | 200 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | Positive |
| Output Type | Adjustable (Fixed) |
| Package / Case | 10-VFDFN Exposed Pad |
| Supplier Device Package | 10-DFN (3x3) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 25 V |
| Voltage - Input (Min) [Min] | 4.5 V |
| Voltage - Output (Max) [Max] | 8 V |
| Voltage - Output (Min/Fixed) | 0.9 V |
| Voltage - Output (Min/Fixed) | 3.47 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
PM6644 Series
The PM6644 is a 350 mA valley current limit step-down 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 switching regulator can be programmed to regulate a fixed value of 3.47 V or it can deliver an adjustable voltage, depending on the FB pin set-up.
Documents
Technical documentation and resources