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White LED Step-Up Regulator
EC4513
Preliminary
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DR18EV9005-VER1.0
The EC4513 is a constant current boost regulator specially designed for driving white LEDs. It can drive 4
LEDs in series and achieves efficiency up to 90%. The brightness of the LEDs is adjusted through a voltage
level on the CNTL pin. When the level falls below 0.2V, the chip goes into shut-down mode and consumes
less than 1µA of supply current for VIN less than 5.5V. The EC4513 is available in the 8-pin MSOP packages.
Features
Applications
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2.6V to 13.2V input voltage
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PDAs
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18V maximum output voltage
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Cellular phones
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Digital cameras
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1MHz switching frequency
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White LED backlighting
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Up to 90% efficiency
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1µA maximum shut-down current
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Dimming control
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8-pin MSOP packages
Pinouts
Application Circuit
MSOP 8-PIN
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