LM5146RGYR
Active100-V SYNCHRONOUS BUCK DC/DC CONTROLLER WITH WIDE DUTY-CYCLE RANGE
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LM5146RGYR
Active100-V SYNCHRONOUS BUCK DC/DC CONTROLLER WITH WIDE DUTY-CYCLE RANGE
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Technical Specifications
Parameters and characteristics for this part
| Specification | LM5146RGYR |
|---|---|
| Clock Sync | True |
| Control Features | Phase Control, Frequency Control, Ramp, Soft Start, Enable, Current Limit, Power Good |
| 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] | 150 °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-VQFN (3.5x4.5) |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 100 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 5.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 4.77 | |
| 10 | $ 4.28 | |||
| 25 | $ 4.05 | |||
| 100 | $ 3.51 | |||
| 250 | $ 3.33 | |||
| 500 | $ 2.99 | |||
| 1000 | $ 2.52 | |||
| Digi-Reel® | 1 | $ 4.77 | ||
| 10 | $ 4.28 | |||
| 25 | $ 4.05 | |||
| 100 | $ 3.51 | |||
| 250 | $ 3.33 | |||
| 500 | $ 2.99 | |||
| 1000 | $ 2.52 | |||
| Tape & Reel (TR) | 3000 | $ 2.12 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.19 | |
| 100 | $ 2.80 | |||
| 250 | $ 1.96 | |||
| 1000 | $ 1.58 | |||
Description
General part information
LM5146-Q1 Series
The LM5146-Q1 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU) and HEV/EV systems.
Forced-PWM (FPWM) operation eliminates switching frequency variation to minimize EMI, while user-selectable diode emulation lowers current consumption at light-load conditions. The adjustable switching frequency as high as 1 MHz can be synchronized to an external clock source to eliminate beat frequencies in noise-sensitive applications
The LM5146-Q1 100-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns gives large step-down ratios, enabling the direct step-down conversion from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5146-Q1 continues to operate during input voltage dips as low as 5.5 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications, ADAS (surround view ECU) and HEV/EV systems.
Documents
Technical documentation and resources
