FEATURES

On Board Power MOSFET

Drives up to 8 Series White LEDs

Up to 87% Efficiency

1.2 MHz Fixed Switching Frequency

Open Load Shutdown

Low 104mV Feedback Voltage

Soft Start/PWM Dimming

UVLO, Thermal Shutdown

Internal Current Limit

Available in 6L-SOT26

APPLICATIONS

Cellular and cordless phones

Wireless LAN cards

Palmtop computers

Personal Communication equipment

Pen drives

Bluetooth devices

DESCRIPTION

The PIC8518 is a step up converter designed for

driving up to 8 series white LEDs from 5V input.

The PIC8518 uses current mode, fixed frequency

architecture to regulate the LED current, which is

measured through an external current sense

resistor. Its low 104mV feedback voltage reduces

power loss and improves efficiency. The OV pin

monitors the output voltage and turns off the

converter if an over-voltage condition is present

due to an open circuit condition.

The PIC8518 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload. The PIC8518 is available in small 6-pin

TSOT26.

TYPICAL APPLICATION CIRCUIT

High Efficiency, Fixed

Frequency WLED Driver

PIC8518

www.picsemi.com

Road-8, House-2/A, Baridhara Diplomatic Area, Dhaka-1212, Phone: +880-2- 8861966, Fax: +880-2-8835244

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