L5030

UNISONIC TECHNOLOGIES CO., LTD L5030 LINEAR INTEGRATED CIRCUIT BOOST-UP VOLTAGE CONVERTER FOR LED DRIVER  DESCRIPTION The L5030 is a high efficiency boost converter operating in current loop, based on a PFM mode to drive LEDs. The current mode regulation allows the uniform brightness of LEDs. The wide application of L5030 makes it suitable for many types of battery applications such as Li-ions, Alkaline, or Sealed Lead Acid battery. The combination of few external components and small package size keeps the converter board area to a minimum in space-restricted applications.  FEATURES * Inductor based converter brings up to 92% efficiency * +0.8V to +6.0V input voltage range * 0.92V guaranteed start up input voltage * Boost up control using PFM * Constant output current regulation  ORDERING INFORMATION Ordering Number L5030G-AF5-R Package SOT-25 Packing Tape Reel  MARKING 54 E0C0G 1 23 www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 6 QW-R125-001.F L5030 LINEAR INTEGRATED CIRCUIT  PIN DESCRIPTIONS PIN NO. 1 2 3 4 SYMBOL VCC GND NC ISENSE I/O I 5 VDRIVE O DESCRIPTION Supply voltage Ground No connection Current sense input Output drive for external switching transistor. Connected to the base of external switching transistor.  BLOCK DIAGRAM 19mV VREF ISENSE + SQ -R Oscillator ON/OFF Time Control VDRIVE Driver UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R125-001.F L5030 LINEAR INTEGRATED CIRCUIT  DEVICE...