DCDC Converter, 1ch, Step-up, Inductive DCDC1ch Feature High efficiency 85 570kHz operation 570kHz Internal switching transistor Maximum duty cycle 90% 90 Very small inductor available Very small package SON3024-8 0.75mm SON3024-8 Operating Voltage Range VOP=2.65 to 16V VOP=2.65~16V Operating Temp. Range TOP=-30 to +85C TOP=-30~+85C PD=600mW Power Dissipation PD=600mW Characteristics Part Name Number of Current Stabilizer - TK11855 fOSC Number of LED in serial connection 2 to 4 LED 570kHz ILED Max 20mA Ordering Guide, Marking Part Name Ordering Name TK11855 Marking TK11855FTL-GH Description Order Size TK11855: Part Name 3,000 F: SON3024-8 Package pcs. TL: Tape&Reel, Left /Reel -GH: PB-Free&Halogen Free AB0 LOT Block Diagram, Standard Application L 15H TK11855F PGND EN 1 Oscillator 8 Reference Voltage on/off SW PWM Comp VIN 2 1 7 Output Drive Control VIN 2 CIN 4.7F 3 4 0.6V GND Over Current Detector 3 Ovp EAOUT 4 5 Error Amp VIN GND VFB PGND SW OVP EA.OUT 8 7 SBD 6 COUT 5 2.2F ILED 6 VFB En RLED 12 CEA 0.22F 0.267V 2010 AUTUMN Page 127 12 DCDC Converter TK11855