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LM5157QRTERQ1 Breakout
IC BOOST/SEPIC/FLYBACK CONV 50V 16WQFN
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Automotive-qualified wide input boost/SEPIC/flyback converter controller with integrated 50V power switch. Operates from 2.9V to 45V input with adjustable output up to 48V, featuring 2.2MHz switching frequency, 45mΩ RDSON, and primary-side regulation for flyback topologies without optocoupler. Includes spread spectrum EMI mitigation, hiccup overload protection, UVLO, and thermal shutdown for automotive battery management and power supply applications.
Package: QFN-16 (3×3mm) · 16 pins
Why does this need a breakout?
This 3×3mm QFN with 0.5mm pitch requires a breakout board to hand-solder reliably—the fine pitch and sub-millimeter pad spacing make direct assembly impractical without professional equipment. The breakout converts the hidden pads to accessible 0.1" spaced pins, enabling breadboard prototyping of energy harvesting and battery management circuits.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | LM5157QRTERQ1 |
| Package | QFN-16 (3×3mm) |
| Pin Count | 16 |
| Current - Output | 6.5A (Switch) |
| Frequency - Switching | 100kHz ~ 2.2MHz |
| Number of Outputs | 1 |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Topology | Boost, Flyback, SEPIC |
| Voltage - Input (Max) | 45V |
| Voltage - Input (Min) | 1.5V |
| Voltage - Output (Max) | 48V |
| Voltage - Output (Min/Fixed) | 1.5V |
What's Included
BILL OF MATERIALS
- 1x LM5157QRTERQ1 soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS