The LM5008A DC/DC converter is a functional variant of the LM5008 COT Buck Switching Regulator. The functional differences of the LM5008A are: the minimum input operating voltage is 6 V, the on-time equation is slightly different, and the requirement for a minimum load current is removed.
The LM5008A 350-mA step-down switching regulator features all of the functions required 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 6 V to 95 V. The device is easy to implement and is provided in 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The converter uses PWM control scheme with an on-time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The control scheme 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 control while providing minimum foldback. Other features include: thermal shutdown, VCC undervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a pre-charge switch.
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | LM5008A 95-V, 350-mA, Constant On-Time DC/DC Buck Switching Regulator datasheet (Rev. H) | 11 Oct 2018 |
| Technical article | Minimize the impact of the MLCC shortage on your power application | 29 Mar 2019 | |
| Technical article | Eight switching circuits to power wide VIN applications - brought to you by Vijay Choudhary and presented by Santa’s reindeer | 18 Dec 2013 | |
| White paper | Wide VIN power management ICs simplify white paper (Rev. A) | 19 Sep 2013 | |
| User guide | AN-1925 LM5008A Evaluation Board (Rev. C) | 30 Apr 2013 |
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The LM5008AEVAL evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 5V output over an input range of 8V to 75V. The circuit delivers load currents to 300 mA, with current (...)
| Package | Pins | Download |
|---|---|---|
| VSSOP (DGK) | 8 | View options |
| WSON (NGU) | 8 | View options |
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