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DC/DC Boost Regulator IC

Mon, 04/30/2001 - 6:15am
A super-high efficiency DC/DC boost converter for driving white LEDs and biasing notebook PC LCD panels is now available from Micrel.

With a 2.4 V to 16 V input voltage range, and a low shutdown current of < 1 uA, the MIC2145 is ideal for portable, low input voltage applications.

Leading-edge cell phones and PDAs are using white LEDs as the solution of choice for backlighting color LCDs. With an integrated 1.5 A switch, the MIC2145 can easily drive four white LEDs for cellular applications, or up to 10 white LEDs for larger panel PDA applications.

A unique peak-current-set feature allows designers to program the peak switch current to the level, which allows maximum efficiency. This feature allows the MIC2145 to be highly efficient in a wide range of applications and load currents.

In notebook PC applications, the MIC2145 efficiently boosts the readily available 3.3 V or 5 V supply to provide the required LCD bias for TFT displays. A soft-start feature reduces power supply noise associated with in-rush current. Separate analog and power grounds further minimize noise.

The MIC2145BMM is available in a MSOP-8 package.

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