FSP3170

SMD Type Integrate Circuit WIDE INPUT 2A STEP DOWN CONVERTER FSP3170 ■ Features z 2A Output Current z Up to 90% Efficiency z 4.75V to 20V Input Range z 40µA Shutdown Supply Current z 400kHz Switching Frequency z Adjustable Output Voltage z Cycle-by-Cycle Current Limit Protection z Thermal Shutdown Protection z Frequency Foldback at Short Circuit z Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors z SOP8L Package SOP-8 ■ Functional Block Diagram BS IN SW GND 1 2 3 4 8 N/C 7 EN 6 COMP 5 FB ■ Absolute Maximum Ratings Ta = 25℃ Parameter Value Unit IN Supply Voltage -0.3 to 20 V SW Voltage BS Voltage EN, FB, COMP Voltage -1 to VIN + 1 VSW – 0.3 to VSW + 8 -0.3 to 20 V V V Continuous SW Current Internally limited A Junction to Ambient Thermal Resistance (θJA) Junction to Ambient Case Resistance (θJC) Maximum Power Dissipation 105 °C/W 50 °C/W 0.76 W Operating Junction Temperature -40 to 150 °C Storage Temperature -55 to 150 °C Lead Temperature (Soldering, 10 sec) 300 °C (Note: Exceeding these limits may damage the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.) www.kexin.com.cn 1 SMD Type Integrate Circuit FSP3170 ■ Electrical Characteristics (Ta = 25℃,VEN=5V, VIN=12V,unless otherwise specified) Parameter Symbol Input Voltage Feedback Voltage Saturation voltage of output driver VIN VFB VCEsat SW Leakage Current Limit COMP to Current Limit Transconductance ...