LM51571QRTERQ1
Active4-A, 50-V, 2.2-MHZ WIDE VIN BOOST, FLYBACK, & SEPIC CONVERTER WITH DUAL RANDOM SPREAD SPECTRUM
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LM51571QRTERQ1
Active4-A, 50-V, 2.2-MHZ WIDE VIN BOOST, FLYBACK, & SEPIC CONVERTER WITH DUAL RANDOM SPREAD SPECTRUM
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Technical Specifications
Parameters and characteristics for this part
| Specification | LM51571QRTERQ1 |
|---|---|
| Current - Output | 4.33 A |
| Frequency - Switching [Max] | 2.2 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Up, Step-Up/Step-Down |
| Grade | Automotive |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 16-WFQFN Exposed Pad |
| Qualification | AEC-Q100 |
| Supplier Device Package | 16-WQFN (3x3) |
| Synchronous Rectifier | False |
| Topology | Flyback, SEPIC, Boost |
| Voltage - Input (Max) [Max] | 45 V |
| Voltage - Input (Min) [Min] | 1.5 V |
| Voltage - Output (Max) [Max] | 48 V |
| Voltage - Output (Min/Fixed) | 1.5 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 | $ 4.31 | |
| 10 | $ 3.88 | |||
| 25 | $ 3.66 | |||
| 100 | $ 3.17 | |||
| 250 | $ 3.01 | |||
| 500 | $ 2.70 | |||
| 1000 | $ 2.28 | |||
| Digi-Reel® | 1 | $ 4.31 | ||
| 10 | $ 3.88 | |||
| 25 | $ 3.66 | |||
| 100 | $ 3.17 | |||
| 250 | $ 3.01 | |||
| 500 | $ 2.70 | |||
| 1000 | $ 2.28 | |||
| Tape & Reel (TR) | 3000 | $ 2.17 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.26 | |
| 100 | $ 2.85 | |||
| 250 | $ 2.00 | |||
| 1000 | $ 1.61 | |||
Description
General part information
LM51571-Q1 Series
The LM5157 device is a wide input range, non-synchronous boost converter with integrated 50-V power switch.
The device can be used in boost, SEPIC, and flyback topologies. The device can start up from a single-cell battery with a minimum of 2.9 V. It can operate with an input supply voltage as low as 1.5 V if the BIAS pin is greater than 2.9 V.
The BIAS pin operates up to 45 V (50-V absolute maximum). The switching frequency is dynamically programmable with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. To reduce the EMI of the power supply, the device provides a selectable Dual Random Spread Spectrum, which reduces the EMI over a wide frequency range.
Documents
Technical documentation and resources
