AT1316A Global Mixed-mode Technology High Efficiency, Constant Current 20V WhiteLEDs Driver Feature Description The AT1316A step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.0 MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The low reference voltage minimized the power loss across the current-setting resistor. Operating Voltage: 2.5V to 5.5V. High Operating Frequency: 1MHz High Output Voltage: Up to 20V(Typ.) Digital Dimming Control. Built-in Cycle-by Cycle Current-Limiting. Built-in Soft-Start Function. 0.1V/0.2V/0.3V Low Reference Voltage Thermal Overload Protection TSOT-23-6 Package Application GPS Navigation System Compact Back Light Module Constant Current Source LED Module The AT1316A is available in TSOT-23-6 packages. Ordering Information ORDER NUMBER MARKING VOLTAGE TEMP. RANGE PACKAGE (Green) AT1316A-01TP1U 3A01x 0.1V -40°C to 85°C TSOT-23-6 AT1316A-02TP1U 3A02x 0.2V -40°C to 85°C TSOT-23-6 AT1316A-03TP1U 3A03x 0.3V -40°C to 85°C TSOT-23-6 Note: TP : TSOT-23-6 1 : Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit ※ Use the tantalum capacitor to eliminate inductor noise on output terminal when you want to control dimming function. AT1316A LX 1 6 VIN GND 2 5 OVP FB 3 4 EN AT1316A TSOT-23-6 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.7 Mar 08, 2012 1