The LM5008 350-mA step-down switching converter features all of the functions needed to implement a low-cost and efficient buck regulator. This high-voltage converter has an integrated 100-V N-channel buck switch and operates over an input voltage range of 9 V to 95 V. The device is easy to implement and is provided in the 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The converter uses a hysteretic control scheme with a PWM on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The hysteretic control requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to VOUT. This scheme ensures short-circuit protection while providing minimum foldback. Other protection features include: thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, and maximum duty cycle limiter.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5008 95-V, 350-mA, Constant On-Time DC/DC Buck Switching Regulator datasheet (Rev. I) | PDF | HTML | 11 Oct 2018 |
| Application note | Stability Analysis and Design of COT Type-3 Ripple Circuit | 20 Mar 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| White paper | Wide VIN power management ICs simplify white paper (Rev. A) | 19 Sep 2013 | ||
| EVM User's guide | AN-1330 LM5008 Evaluation Board (Rev. B) | 30 Apr 2013 | ||
| EVM User's guide | AN-1925 LM5008A Evaluation Board (Rev. C) | 30 Apr 2013 | ||
| Application note | Analysis & Design of Hysteretic Constant Freq Buck Regr Using the LM5007 (Rev. B) | 30 Apr 2013 | ||
| Application note | Boot Capacitor Regulation in LM25007 Constant-On-Time (COT) Converter (Rev. A) | 23 Apr 2013 | ||
| Application note | Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A) | 23 Apr 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
LM5008 High Voltage (100V) Step Down Switching Regulator
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
| WSON (NGU) | 8 | Ultra Librarian |
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