TK11859 DCDC Converter, 1ch, Step-up, Inductive DCDC1ch Feature High efficiency 85 1.2MHz operation 1.2MHz 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=2.30 to 16V VOP=2.30~16V Operating Temp. Range TOP=-30 to +85C TOP=-30~+85C PD=600mW Power Dissipation PD=600mW Characteristics Part Name TK11859 Number of Current Stabilizer - fOSC Number of LED in serial connection 2 to 4 LED 1.2MHz ILED Max 20mA Ordering Guide, Marking Part Name TK11859 Ordering Name Marking TK11859FTL-GH Description Order Size TK11859: Part Name 3,000 F: SON3024-8 Package pcs. TL: Tape&Reel, Left /Reel -GH: PB-Free&Halogen Free AB4 LOT Block Diagram, Standard Application L EN 1 Oscillator 8 0.6V SW VIN 2 CIN 3 Over Current Detector 4 0.179V Page 128 7 Output Drive Control 2 GND 3 VFB 1 on/off PWM Comp VIN TK11859F PGND Reference Voltage Error Amp 4 6 OVP 5 EAOUT VIN PGN 8 D 7 SW GND OVP En VFB EA.OUT SBD 6 COUT 5 ILED RLED CEA 2010 AUTUMN