Absolute Maximum Ratings (Note 1) Vin to GND …………………………………………… –0.3V to +6V SW Voltage to GND ...…………………… –0.3V to Vin+0.3V EN Voltage to GND ..……………………………… –0.3V to Vin FB/Vout to GND ..………………………………… –0.3V to Vin SW Peak Current ………………………………………….………. 3A Operating Temperature Range ……...… –40°C to +85°C Junction Temperature ……………..………….…........ +150°C Storage Temperature Range …………... –65°C to +150°C Lead Temperature (Soldering 10s) …………...…. +260°C ESD Classification …………………………………………… Class 2 CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Electro-Static Discharge Sensitivity This integrated circuit can be damaged by ESD. It is recommended that all integrated circuits be handled with proper precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Package Thermal Characteristics (Note 2) TSOT23-5L: Thermal Resistance, θJA …………..………………… 250°C/W Thermal Resistance, θJC …………..………………… 130°C/W TDFN 2x2-6L: Thermal Resistance, θJA …………..…………………. 120°C/W Thermal Resistance, θJC …………..…………………… 20°C/W Recommended Operating Conditions (Note 3) Supply Input Voltage ……….………………… +2.5V to +5.5V Junction Temperature Range ………… –40°C to +125°C Ambient Temperature Range …………… –40°C to +85°C Pins Description TSOT 23-5L TDFN 2x2-6L Symbol Description 1 2 EN Enable control input pin. 2 5 GND Ground pin. 3 4 SW Power switch output. 4 3 Vin Main supply pin. --- 1 NC No connected. 5 6 FB Feedback pin. Vout=0.6×(1+R1/R2). Add optional C1 to speed u

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