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LM3495MTCX 数据表(PDF) 4 Page - National Semiconductor (TI) |
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LM3495MTCX 数据表(HTML) 4 Page - National Semiconductor (TI) |
4 / 26 page Electrical Characteristics Specifications with standard type are for T J = 25˚C only; limits in boldface type apply over the full Operating Junction Temperature (T J) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T J = 25˚C, and are provided for reference purposes only. Unless otherwise indicated, V IN = 12V. (Continued) Symbol Parameter Conditions Min Typ (Note 4) Max Units R DS3 Low-Side FET Driver Pull-up ON resistance VLIN5 = 5.5V 1.4 Ω R DS4 Low-Side FET Driver Pull-down ON resistance VLIN5 = 5.5V 0.7 Ω OSCILLATOR f SW PWM Frequency R ADJ = 150 k Ω 200 kHz R ADJ = 54.9 k Ω 450 500 550 R ADJ = 17.8 k Ω 1500 V SYNC-HI Threshold for SYNC on FREQ Pin SYNC Voltage Rising 1.2 V V SYNC-LO Threshold for SYNC on FREQ Pin SYNC Voltage Falling 0.3 V t ON-SKIP On Time During Skip Mode V O = 1.5V f SW = 500 kHz 125 ns t ON-MAX Adaptive Maximum On-time Limit V O = 1.5V f SW = 500 kHz 750 ns t OFF-MIN Minimum Off-time 300 ns ERROR AMP g M Transconductance 750 µmho BW -3dB Open Loop Bandwidth COMP/SD Floating 5 MHz I FB FB Pin Bias Current V FB = 0.6V 1 nA I SOURCE COMP/SD Pin Source Current V FB = 0.5V, COMP/SD = 1.5V 40 µA I SINK COMP/SD Pin Sink Current V FB = 0.7V, COMP/SD = 1.5V 40 µA V COMP-HI COMP/SD Pin Voltage High Clamp V FB = 0.5V 2 V V COMP-LO COMP/SD Pin Voltage Low Clamp V FB = 0.7V 0.9 V TRACKING V TEND Track End Threshold 0.6 V V TRACK-OS Track to FB Offset TRACK = 0.55V 15 mV INTERNAL VOLTAGE REGULATOR V VLIN5 Voltage at VLIN5 Pin (Note 3) V IN = 12V, VLIN5 Current = 25 mA 4.72 V V IN = 3.3V, VLIN5 Current = 25 mA 3.0 V LOGIC INPUTS AND OUTPUTS V SD-HI COMP/SD Pin Logic High Trip Point COMP/SD Pin Voltage Rising 0.3 0.4 V V SD-LO COMP/SD Pin Logic Low Trip Point COMP/SD Pin Voltage Falling 0.2 0.26 V THERMAL CHARACTERISTICS θ JA Junction-to-Ambient Thermal Resistance 155 ˚C/W T SD Thermal Shutdown Threshold 150 ˚C T SD-HYS Thermal Shutdown Hysteresis 15 ˚C Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 k Ω resistor into each pin. Note 3: VLIN5 provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading. Note 4: Typical specifications represent the most likely parametric norm at 25˚C operation. Note 5: An extended negative voltage limit of –2V applies for a duration of 20 ns per switching cycle www.national.com 4 |
类似零件编号 - LM3495MTCX |
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类似说明 - LM3495MTCX |
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