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LTM8042IV-1PBF Datasheet(PDF) 3 Page - Linear Technology |
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LTM8042IV-1PBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 32 page  LTM8042/LTM8042-1 3 80421fa ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Absolute maximum voltage at VCC, RUN, PWM, TGEN, BSTIN/ BKLED– pins is 40V for non-repetitive one second transients and 30V for continuous operation. Note 3: The LTM8042E/LTM8042E-1 are guaranteed to meet performance specifications from 0°C to 125°C ambient. Specifications over the full –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The l denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, buck mode with 4Ω load. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC(MIN) Minimum Input DC Voltage l 3V ILED LTM8042 LED Current LTM8042-1 LED Current CTL Open CTL Open, RCTL = 6.81k RCTL = 6.81k 0.9 0.45 0.34 0.17 0.5 1.05 0.55 0.39 0.20 A A A A VCLAMP Open LED Clamp Voltage Boost Mode, LED+ Open 36 V ΔIOUT/IOUT Output Current Line Regulation LTM8042, 6V < BSTOUT/BKIN < 30V LTM8042-1, 6V < BSTOUT/BKIN < 30V 0.5 0.5 % % IQVCC VCC Supply Current PWM = 0V RUN = 0V 4.2 0.1 1 mA μA fSW Switching Frequency RT = 90.9k RT = 22.1k RT = 6.04k 0.22 0.68 1.7 0.25 0.8 2 0.27 0.92 2.3 MHz MHz MHz ISS Soft-Start Pin Current SS = 0.5V, Out of Pin 6 9 12 μA fSYNC Synchronization Frequency Range 0.3 2.5 MHz ISYNC SYNC Pull-Down Current (Into the Pin) VSYNC = 2V 60 μA VSYNC(IL) SYNC Input Low 0.4 V VSYNC(IH) SYNC Input High 1.5 V ICTL CTL Input Bias Current CTL = 0V, Flows Out of Pin 100 μA VRUN(IH) RUN Input Voltage High 1.5 V VRUN(IL) RUN Input Voltage Low 0.4 V IRUN RUN Pin Bias Current 60 100 μA VPWM(IH) PWM Input Voltage High 1.5 V VPWM(IL) PWM Input Voltage Low 0.4 V IPWM PWM Pin Bias Current 60 120 μA VTG(OH) TG Output High Voltage Relative to LED+, 100k from LED+ to TG 0 V VTG(OL) TG Output Low Voltage Relative to LED+, 100k from LED+ to TG –7 V VTGEN(IH) TGEN Input Voltage High PWM = 0V 1.5 V VTGEN(IL) TGEN Input Voltage Low 0.4 V ITGEN TGEN Pin Bias Current 100 200 μA The LTM8042I/LTM8042I-1 are guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. Note that the maximum internal temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. Note 4: This device includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed the maximum internal operating temperature when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. |
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