CAT4237TD-GT3 ON Semiconductor

CAT4237 White LED Driver, CMOS Boost Converter, High Voltage Description CAT4237 L D V V IN OUT 33 H 3 V to 4.2 V C C 1 2 4.7 F SW 0.22 F VIN CAT4237 V = 300 mV FB 20 mA OFF ON SHDN FB R GND 1 15 L: Sumida CDRH3D16330 D: Central CMDSH054 (rated 40 V) C2: Taiyo Yuden UMK212BJ224 (rated 50 V) Figure 1. Typical Application Circuit Table 1. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units V , FB voltage 0.3 to +7 V IN SHDN voltage 0.3 to +7 V SW voltage 0.3 to +55 V Storage Temperature Range 65 to +160 C Junction Temperature Range 40 to +150 C Lead Temperature 300 C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 2. RECOMMENDED OPERATING CONDITIONS Parameters Range Units V 2.8 to 5.5 V IN SW pin voltage 0 to 30 V Ambient Temperature Range 40 to +85 C 6, 7 or 8 LEDs 1 to 40 mA NOTE: Typical application circuit with external components is shown above. 5. Thin SOT235 package thermal resistance = 135C/W when mounted on board over a ground plane. JA