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ACT4075 Datasheet(PDF) 3 Page - Active-Semi, Inc |
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ACT4075 Datasheet(HTML) 3 Page - Active-Semi, Inc |
3 / 10 page Innovative Products. Active Solutions. - 3 - www.active-semi.com Copyright © 2007 Active-Semi, Inc. ACT4075 Rev PrA, 13-Aug-07 ABSOLUTE MAXIMUM RATINGS PARAMETER VALUE UNIT IN to G -0.3 to +34 V EN to G -0.3 to VIN + 0.3 V BS to SW -0.3 to +8 V FB, COMP to G -0.3 to 6 V Continuous SW Current Internally limited A Junction to Ambient Thermal Resistance (θJA) 46 °C/W Maximum Power Dissipation 1.8 W Operating Junction Temperature -40 to 150 °C Storage Temperature -55 to 150 °C Lead Temperature (Soldering, 10 sec) 300 °C SW to G -1 to VIN + 1 V ELECTRICAL CHARACTERISTICS (VIN = 12V, TA= 25°C, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage VIN VOUT = 2.5V, ILOAD = 0A to 2.5A 4.5 32 V Feedback Voltage VFB 1.198 1.222 1.246 V High-Side Switch On Resistance RONH 100 mΩ Low-Side Switch On Resistance RONL 10 Ω SW Leakage VEN = 0, VIN = 12V, VSW = 0V 0 10 µA Current Limit ILIM 3.5 5 A COMP to Current Limit Transcon- ductance GCOMP Δ ILOAD/ΔICOMP 3 A/V Error Amplifier Transconductance GEA Δ ICOMP = ±10µA 550 µA/V Error Amplifier DC Gain AVEA 4000 V/V Switching Frequency fSW 340 410 490 kHz Short Circuit Switching Frequency VFB = 0V 40 kHz Maximum Duty Cycle DMAX VFB = 1.1V, PWM mode 90 % Minimum Duty Cycle VFB = 1.4V, PFM mode 0 % Enable Threshold Voltage Hysteresis = 0.1V 0.7 1 1.3 V Enable Pull Up Current Pin pulled up to VIN when left uncon- nected 2 µA Supply Current in Shutdown VEN = 0 6 20 µA IC Supply Current in Operation VEN = 3V, not switching 0.85 2 mA Thermal Shutdown Temperature Hysteresis = 10°C 160 °C : Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability. |
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