Datasheet LT3514 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Triple Step-Down Switching Regulator with 100% Duty Cycle Operation |
| Pages / Page | 26 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| File Format / Size | PDF / 482 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LT3514
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V unless otherwise noted. SYMBOL CONDITIONS MIN TYP MAX UNITS
EN/UVLO Threshold Voltage Rising l 1.2 1.44 1.6 V EN/UVLO Threshold Voltage Hysteresis 110 mV EN/UVLO Threshold Current Hysteresis VEN/UVLO = Measured Rising Threshold – 50mV 1.3 µA (Note 3) Internal VIN Undervoltage Lockout 2.4 2.9 3.2 V Quiescent Current (VIN) in Shutdown VEN/UVLO = 0V 0.01 2 µA Quiescent Current (VIN) VEN/UVLO = 1V 4 10 µA Quiescent Current (VIN) VEN/UVLO = 1.5V, VRUN/SS(1,3,4) = Open, 2.7 mA VFB(1,3,4) = 0.9V, VSKY = 17V (Note 4) Quiescent Current (SKY) VEN/UVLO = 1.5V, VRUN/SS(1,3,4) = Open, 4.4 mA VFB(1,3,4) = 0.9V, VSKY = 17V (Note 4) RUN/SS Pin Source Current VRUN/SS = 0V 1.3 µA RUN/SS Pin Threshold for Switching VFB = 0V 50 100 mV Feedback Voltage 790 800 810 mV l 784 800 816 mV FB Pin Current VFB = Measured VFB (Note 5) l 15 150 nA Reference Line Regulation VIN = 5V to 40V –0.015 %/V SKY Pin Current ISW1 = 1A or ISW4 = 1A 27 40 mA SKY Pin Current ISW3 = 2A 54 80 mA SKY Voltage above VIN Voltage VSKY – VIN 4.85 V Switching Frequency RT = 6.34k l 1.8 2.1 2.4 MHz RT = 18.2k l 0.85 1 1.15 MHz RT = 100k l 220 270 320 kHz Switching Phase RT = 18.2k 150 180 210 Deg SYNC Threshold Voltage 1.25 V SYNC Input Frequency 0.35 2.2 MHz Switch Current Limit (SW1,4) (Note 6) 1.45 1.75 2.1 A Switch VCESAT (SW1,4) ISW1, SW4 = 1A 400 mV Switch Leakage Current (SW1,4) 0.1 2 µA Catch Diode Current Limit (SW1,4) FB = 0V 0.75 1.15 1.33 A FB = 0.7V 1.0 1.45 1.67 A Switch Current Limit (SW3) (Note 6) 3 3.5 4.2 A Switch VCESAT (SW3) ISW3 = 2A 400 mV Switch Leakage Current (SW3) 0.1 4 µA Catch Diode Current Limit (SW3) FB = 0V 1.5 2 2.4 A FB = 0.7V 2.0 2.5 3.0 A Switch Current Limit (SW5) (Note 6) 220 320 mA Switch VCESAT (SW5) ISW = 200mA 230 mV Switch Leakage Current (SW5) 0.1 2 µA Boost Diode Current Limit (SW5) VIN = 5V 350 450 mA PG Threshold Offset VFB Rising 65 90 125 mV PG Hysteresis VFB Rising – VFB Falling 35 mV 3514fa For more information www.linear.com/LT3514 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V unless otherwise noted. SYMBOL CONDITIONS MIN TYP MAX UNITS
EN/UVLO Threshold Voltage Rising l 1.2 1.44 1.6 V EN/UVLO Threshold Voltage Hysteresis 110 mV EN/UVLO Threshold Current Hysteresis VEN/UVLO = Measured Rising Threshold – 50mV 1.3 µA (Note 3) Internal VIN Undervoltage Lockout 2.4 2.9 3.2 V Quiescent Current (VIN) in Shutdown VEN/UVLO = 0V 0.01 2 µA Quiescent Current (VIN) VEN/UVLO = 1V 4 10 µA Quiescent Current (VIN) VEN/UVLO = 1.5V, VRUN/SS(1,3,4) = Open, 2.7 mA VFB(1,3,4) = 0.9V, VSKY = 17V (Note 4) Quiescent Current (SKY) VEN/UVLO = 1.5V, VRUN/SS(1,3,4) = Open, 4.4 mA VFB(1,3,4) = 0.9V, VSKY = 17V (Note 4) RUN/SS Pin Source Current VRUN/SS = 0V 1.3 µA RUN/SS Pin Threshold for Switching VFB = 0V 50 100 mV Feedback Voltage 790 800 810 mV l 784 800 816 mV FB Pin Current VFB = Measured VFB (Note 5) l 15 150 nA Reference Line Regulation VIN = 5V to 40V –0.015 %/V SKY Pin Current ISW1 = 1A or ISW4 = 1A 27 40 mA SKY Pin Current ISW3 = 2A 54 80 mA SKY Voltage above VIN Voltage VSKY – VIN 4.85 V Switching Frequency RT = 6.34k l 1.8 2.1 2.4 MHz RT = 18.2k l 0.85 1 1.15 MHz RT = 100k l 220 270 320 kHz Switching Phase RT = 18.2k 150 180 210 Deg SYNC Threshold Voltage 1.25 V SYNC Input Frequency 0.35 2.2 MHz Switch Current Limit (SW1,4) (Note 6) 1.45 1.75 2.1 A Switch VCESAT (SW1,4) ISW1, SW4 = 1A 400 mV Switch Leakage Current (SW1,4) 0.1 2 µA Catch Diode Current Limit (SW1,4) FB = 0V 0.75 1.15 1.33 A FB = 0.7V 1.0 1.45 1.67 A Switch Current Limit (SW3) (Note 6) 3 3.5 4.2 A Switch VCESAT (SW3) ISW3 = 2A 400 mV Switch Leakage Current (SW3) 0.1 4 µA Catch Diode Current Limit (SW3) FB = 0V 1.5 2 2.4 A FB = 0.7V 2.0 2.5 3.0 A Switch Current Limit (SW5) (Note 6) 220 320 mA Switch VCESAT (SW5) ISW = 200mA 230 mV Switch Leakage Current (SW5) 0.1 2 µA Boost Diode Current Limit (SW5) VIN = 5V 350 450 mA PG Threshold Offset VFB Rising 65 90 125 mV PG Hysteresis VFB Rising – VFB Falling 35 mV 3514fa For more information www.linear.com/LT3514 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
