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MAX5099 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX5099 Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 27 page Dual, 2.2MHz, Automotive Synchronous Buck Converter with 80V Load-Dump Protection _______________________________________________________________________________________ 3 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Rising, ON/OFF = IN_HIGH, GATE rising 3.6 4.1 IN_HIGH Startup Voltage IN_HIGH UVLO Falling, ON/OFF = IN_HIGH, GATE falling 3.45 V GATE Charge Current IGATE_CH VIN_HIGH = VON/OFF = 14V, VGATE = V+ = 0V 20 45 80 μA V+ = VIN_HIGH = VON/OFF = 4.5V, IGATE = 1μA 4.0 5.3 7.5 GATE Output Voltage VGATE - VIN_HIGH V+ = VIN_HIGH = VON/OFF = 14V, IGATE = 1μA 9 V GATE Turn-Off Pulldown Current IGATE_PD VIN_HIGH = 14V, VON/OFF = 0V, V+ = 0V, VGATE = 5V 3.6 mA STARTUP/VL REGULATOR VL Undervoltage-Lockout Trip Level UVLO VL falling 3.9 4.1 4.3 V VL Undervoltage-Lockout Hysteresis 180 mV VL Output Voltage VL ISOURCE_ = 0 to 40mA, 5.5V ≤ V+ ≤ 19V 5.0 5.2 5.5 V VL LDO Short-Circuit Current IVL_SHORT V+ = VIN_HIGH = 5.2V 130 mA VL LDO Dropout Voltage VLDO ISOURCE_ = 40mA, V+ = VIN_HIGH = 4.5V 300 550 mV BYPASS OUTPUT BYPASS Voltage VBYPASS IBYPASS = 0μA 1.98 2.00 2.02 V BYPASS Load Regulation ΔVBYPASS 0 < IBYPASS < 100μA (sourcing) 2 5 mV SOFT-START/SOFT-STOP Digital Ramp Period Soft- Start/Soft-Stop Internal 6-bit DAC 2048 fSW Clock Cycles Soft-Start/Soft-Stop Steps 64 Steps VOLTAGE-ERROR AMPLIFIER FB_ Input Bias Current IFB_ 250 nA -40°C ≤ TA ≤ +85°C 0.783 0.8 0.809 FB_ Input-Voltage Set Point VFB_ -40°C ≤ TA ≤ +125°C 0.785 0.814 V FB_ to COMP_ Transconductance gM 1.4 2.4 3.4 mS INTERNAL MOSFETS ISWITCH = 100mA, BST1/VDD1 to VSOURCE1 = 5.2V 195 On-Resistance High-Side MOSFET Converter 1 RON1 ISWITCH = 100mA, BST1/VDD1 to VSOURCE1 = 4.5V 208 355 m Ω ELECTRICAL CHARACTERISTICS (continued) (VDRV = VL, V+ = VL = IN_HIGH = 5.2V or V+ = IN_HIGH = 5.2V to 19V, EN_ = VL, SYNC = GND, IVL = 0mA, PGND = SGND, CBYPASS = 0.22μF (low ESR), CVL = 4.7μF (ceramic), CV+ = 1μF (low ESR), CIN_HIGH = 1μF (ceramic), RIN_HIGH = 3.9kΩ, ROSC = 10kΩ, TJ = -40°C to +125°C, unless otherwise noted.) (Note 2) |
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