L3751PUR
ActiveDC/DC CONTROLLER, SYNCHRONOUS BUCK, 6 V TO 75 V IN, 1 OUTPUT, 99% DUTY CYCLE, 1 MHZ, QFN-EP-20
L3751PUR
ActiveDC/DC CONTROLLER, SYNCHRONOUS BUCK, 6 V TO 75 V IN, 1 OUTPUT, 99% DUTY CYCLE, 1 MHZ, QFN-EP-20
Technical Specifications
Parameters and characteristics for this part
| Specification | L3751PUR |
|---|---|
| Clock Sync | True |
| Control Features | Tracking, Sync, Dead Time Control, Current Limit, Enable, Power Good, Frequency Control, Soft Start |
| Duty Cycle (Max) [Max] | 99 % |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Down |
| Mounting Type | Wettable Flank, Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 20-VFQFN Exposed Pad |
| Supplier Device Package | 20-QFN (3.5x4.5) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 75 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 6 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | N/A | 2916 | $ 2.74 | |
Description
General part information
L3751 Series
The 6 V to 75 V wide input voltage range L3751 synchronous buck controller features extreme voltage conversion ratio over switching frequency range (100 kHz - 1 MHz) thanks to 40 ns minimum conduction time.
The diode emulation (DEM) implements pulse skipping mode that maximizes the efficiency at light-load giving controlled output voltage ripple. The forced PWM (FPWM) over the load range makes the switching frequency constant and minimizes the output voltage ripple.
The Power Good open collector output validates the regulated output voltage for monitoring and it is useful to implement output voltage sequencing for digital ICs during the power-up phase.