tm TE CH T6335A Constant Current Regulator FEATURES GENERAL DESCRIPTION • Constant Current Regulator • Constant Current Option : 150/210/225/240/260/280/300/320/350 mA • Low Dropout Voltage • Low 0.1 uA Shutdown Supply Current • SOT-89 and TO-252 lead-free Package • ESD Human Body Mode Over 5KV • 2.7V to 5V Supply Voltage Range • Build in Thermal Protect 160 °C The T6335A low-dropout bias supply for white LED is a high-performance used in conventional white LED designs. The T6335A has lower bias variation with supply voltage variation, significantly lower dropout voltage Low Shutdown Current in some applications, significantly improved efficiency from DC 2.7V to 5V. The T6335A is available in SOT-89 and TO-252 lead-free package. APPLICATIONS PART NUMBER EXAMPLES • Flash Light • Lighting • Portable Communication Devices • Handheld Electronics • DC/DC LED driver TYPICAL APPLICATION CIRCUITS Part no. T6335A-350AXG Current 350mA Package type SOT-89 T6335A-350AWG 350mA TO-252 T6335A-150AXG T6335A-150AWG 150mA SOT-89 150mA TO-252 V IN 2.7V~5V PIN ARRANGEMENT (Top view) SOT-89 TO-252 OUT T6335A VDD VDD GND OUT to change products or specifications without notice. P. 1 VDD OUT TM Technology Inc. reserves the right GND GND Publication Date: MAR. 2007 Revision: A tm TE CH T6335A PIN DESCRIPTION SYMBOL Pin no. OUT 1 VSS VDD 2 3 DESCRIPTION LED Cathode Connection. Ground Power supply ABSOLUTE MAXIMUM RATINGS Parameter Symbol Value Unit Voltage on any pin relative to GND VIN -0.3 to 6 V Operating Temperature Rang TA -40 to +85 °C TLEAD 300 °C TS -65 to +150 °C 1 W Maximum Soldering Temperature (at leads, 10 sec) Storage Temperature Rang Continuous Power Dissipation ( TA = +70°C ) Electrical Characteristics (Typical values are at TA =25°C) Symbol VDD ILED Description Operating voltage range Maximum LED sink current Conditions Min. Typ. Max VDD is power supply input VDD = 4.5V VLED =3.5V 2.7 V 329 350 371 mA T6335A-320 300 320 339 mA T6335A-300 282 300 318 mA T6335A-280 263 280 296 mA T6335A-260 244 260 275 mA T6335A-240 225 240 254 mA T6335A-225 211 225 238 mA T6335A-210 197 210 222 mA T6335A-150 141 150 159 mA Thermat Protect 160 ILSD LED leakage current in shutdown VDD = GND, VLED = 5V 0.2 P.2 5 T6335A-350 TTP TM Technology Inc. reserves the right to change products or specifications without notice. Unit °C 1 uA Publication Date: MAR. 2007 Revision: A tm TE CH T6335A Typical Operating Characteristics Test Circuit VDD OUT T6335A VDD GND VDD VS. Iout Curve 400 Iout(mA) 350 350mA 300mA 280mA 260mA 240mA 225mA 300 250 200 150 5 4.8 4.6 4.4 4.2 4 3.8 3.6 3.4 3.2 3 VDD(V) TM Technology Inc. reserves the right to change products or specifications without notice. P.3 Publication Date: MAR. 2007 Revision: A tm TE CH T6335A PACKAGE DIMENSIONS SOT-89 D POLISH ED (2X) D1 Symbol E 1 B1 L 3 2 H C B 10'(2X ) A B B1 C D D1 E H e e1 L Dimension in mm Min. Max. 1.40 1.60 0.44 0.56 0.36 0.48 0.35 0.44 4.40 4.60 1.35 1.83 2.29 2.60 3.94 4.25 1.50 BSC 3.00 BSC 0.89 1.2 A e e1 TO-252 Symbol E A A1 b2 E1 c1 4 L2 SEATING PLANE D D1 H 2 1 3 L1 c e b L e1 TM Technology Inc. reserves the right to change products or specifications without notice. P.4 A A1 b b2 c c1 D E D1 E1 e e1 H L L1 L2 Dimension in inch Min. Max. 0.086 0.094 0.040 0.050 0.024 TYP. 0.205 0.215 0.018 0.023 0.018 0.023 0.210 0.220 0.250 0.265 0.180 0.150 0.090 BSC. 0.180 BSC. 0.370 0.410 0.020 0.025 0.040 0.060 0.080 Publication Date: MAR. 2007 Revision: A