The LM3488 is a versatile low-side N-FET high-performance controller for switching regulators. This device is suitable for use in topologies requiring low-side FET, such as boost, flyback, or SEPIC. Moreover, the LM3488 can be operated at extremely high switching frequency to reduce the overall solution size. The switching frequency of LM3488 can be adjusted to any value from 100 kHz to 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.
The LM3488 has built-in features such as thermal shutdown, short-circuit protection, and overvoltage protection. Power-saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.
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This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSSOP (DGK) | 8 | Ultra Librarian |
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The LM3478-88 quick start calculator for SEPIC tool supports the initial calculation of the SEPIC power stage and of the necessary external components for a SEPIC converter using LM3478 or LM3488 as regulation IC.
The LM3478-88 quick start calculator for boost tool supports the initial calculation of the boost power stage and of the necessary external components for a boost converter using LM3478 or LM3488 as regulation IC.
Version 1.1.0
The LM3478-88 quick start calculator for Flyback topology supports the initial calculation of the power stage and of the necessary external components for a Flyback converter using LM3478 or LM3488 as regulation IC.