The LM5009 step-down switching regulator features all of the functions needed to implement a low-cost and efficient, buck regulator. This device is capable of driving a 150-mA load current from a 9.5-V to 95-V input source. The switching frequency can exceed 600 kHz, depending on the input and output voltages. The output voltage can be set from 2.5 V to 85 V. This high-voltage regulator contains an N-channel buck switch and an internal startup regulator. The device is easy to implement and is provided in 8-pin VSSOP and thermally-enhanced, 8-pin WSON packages. The regulator operation is based on a control scheme using an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant over load and input voltage variations. The control scheme requires no loop compensation, resulting in an ultrafast transient response. An intelligent current limit is implemented with forced off-time that is inversely proportional to VOUT. This scheme ensures short-circuit protection and provides minimum foldback. Other features include thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, and maximum duty cycle limiter.
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| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | LM5009 Wide Input, 100-V,150-mA, Step-Down Switching Regulator datasheet (Rev. I) | PDF | HTML | 25 Mai 2021 |
| Application note | Stability Analysis and Design of COT Type-3 Ripple Circuit | 20 Mär 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Technical article | Simplifying 100V wide VIN power conversion | PDF | HTML | 11 Nov 2016 | |
| Technical article | Who tampered with my PLC? Are industrial control systems too flexible? | PDF | HTML | 05 Aug 2016 | |
| White paper | Wide VIN power management ICs simplify white paper (Rev. A) | 19 Sep 2013 | ||
| Application note | AN-1820 LM5032 Interleaved Boost Converter (Rev. A) | 06 Mai 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 |
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LM5009 150mA, 100V Step-Down Switching Regulator
| Gehäuse | Pins | CAD-Symbole, Footprints und 3D-Modelle |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
| WSON (NGU) | 8 | Ultra Librarian |
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