Datasheet LT8631 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 100V, 1A Synchronous Micropower Step-Down Regulator |
| Pages / Page | 26 / 3 — ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 375 Kb |
| Document Language | English |
ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply over the full operating
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LT8631
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 15V, VEN/UV = 2V, unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
EN/UV Voltage Threshold VEN/UV Rising l 1.14 1.19 1.24 V EN/UV Voltage Hysterisis 9 17 25 mV EN/UV Input Current 5 100 nA VIN Undervoltage Lockout VFB = 0.9V l 2.74 2.8 3.05 V Quiescent Current from VIN VEN/UV = 0V 5 7 µA VFB = 0.9V, VVOUT = 0V 16 30 µA VFB = 0.9V, VVOUT = 5V 3.6 5.6 µA Quiescent Current from VIN VEN/UV = 0V l 5 25 µA VFB = 0.9V, VVOUT = 0V l 16 64 µA VFB = 0.9V, VVOUT = 5V l 3.6 22 µA Quiescent Current from VOUT VFB = 0.9V, VVOUT = 5V l 10 45 µA VIN Current in Regulation VVOUT = 5V, ILOAD = 100µA 90 160 µA VVOUT = 5V, VSYNC/MODE = 2V, ILOAD = 100µA 180 350 µA VVOUT = 5V, ILOAD = 1mA 475 650 µA Feedback Bias Current VFB = 0.8V –25 –15 nA Feedback Voltage (VFBREF) VVOUT = 5V, ILOAD = 100mA l 796 808 820 mV Feedback Voltage Line Regulation VIN = 7V to 100V, VOUT = 5V, ILOAD = 500mA 0.01 0.2 %/V Feedback Voltage Load Regulation VIN = 15V, VOUT = 5V, ILOAD = 100mA to 1A –1.5 –0.3 %/A Track/Soft-Start Source Current VFB = 0.9V, VTR/SS = 0V –6.5 –4.5 –2.5 µA Track/Soft-Start VOH VFB = 0.9V 2.9 3.0 3.2 V Track/Soft-Start Sink Current VFB = 0.7V, VTR/SS = 1V 15 30 45 µA Track/Soft-Start VOL VFB = 0V 50 75 mV Track/Soft-Start to Feedback Offset VTR/SS = 0.4V, VVOUT = 5V, ILOAD = 100mA –25 5 25 mV Track/Soft-Start Sink Current POR (Note 4) VFB = 0.9V, VTR/SS = 0.2V 180 230 µA PG Leakage Current VFB = 0V, VPG = 100V –200 0 200 nA PG Lower Threshold % of VFBREF (Note 5) VFB Rising l –10.5 –7.5 –4.5 % PG Upper Threshold % of VFBREF (Note 5) VFB Falling l 4.5 7.5 10.5 % PG Hysterisis (Note 5) 1.4 1.9 2.3 % PG Sink Current VFB = 0.7V, VPG = 0.2V 980 µA Switching Frequency RRT =187kΩ, VVOUT = 5V, ILOAD = 100mA 75 100 125 kHz RRT = 19.6kΩ, VVOUT = 5V, ILOAD = 100mA l 460 500 540 kHz RRT = 8.66kΩ, VVOUT = 5V, ILOAD = 100mA 925 1000 1075 kHz Minimum Switch ON Time VIN = 15V to 25V, RRT = 8.66kΩ, VVOUT = 1.5V, ILOAD = 500mA 100 120 ns Minimum Switch OFF Time VIN = 5V, RRT = 8.66kΩ, VVOUT = 5V, ILOAD = 500mA 190 ns IND to VOUT Burst Current (Note 6) 280 mA IND to VOUT Peak Current (Note 7) 1.4 2.1 2.8 A Maximum VOUT Current in Regulation VIN = 7.5V, RRT = 19.6kΩ, VVOUT = 5V, L = 15µH l 1.00 1.35 1.8 A VIN = 50V, RRT = 19.6kΩ, VVOUT = 5V, L = 15µH 1.2 1.8 2.4 A Switch Pin Leakage Current VSW = 0V, VEN/UV = 0V 50 500 nA VSW = 100V, VIN =100V, VEN/UV = 0V 0.5 2.0 µA Top Switch On-Resistance 775 mΩ Bottom Switch On-Resistance 550 mΩ BST Pin Current VBST = 18V 180 µA 8631fb For more information www.linear.com/LT8631 3
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 15V, VEN/UV = 2V, unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
EN/UV Voltage Threshold VEN/UV Rising l 1.14 1.19 1.24 V EN/UV Voltage Hysterisis 9 17 25 mV EN/UV Input Current 5 100 nA VIN Undervoltage Lockout VFB = 0.9V l 2.74 2.8 3.05 V Quiescent Current from VIN VEN/UV = 0V 5 7 µA VFB = 0.9V, VVOUT = 0V 16 30 µA VFB = 0.9V, VVOUT = 5V 3.6 5.6 µA Quiescent Current from VIN VEN/UV = 0V l 5 25 µA VFB = 0.9V, VVOUT = 0V l 16 64 µA VFB = 0.9V, VVOUT = 5V l 3.6 22 µA Quiescent Current from VOUT VFB = 0.9V, VVOUT = 5V l 10 45 µA VIN Current in Regulation VVOUT = 5V, ILOAD = 100µA 90 160 µA VVOUT = 5V, VSYNC/MODE = 2V, ILOAD = 100µA 180 350 µA VVOUT = 5V, ILOAD = 1mA 475 650 µA Feedback Bias Current VFB = 0.8V –25 –15 nA Feedback Voltage (VFBREF) VVOUT = 5V, ILOAD = 100mA l 796 808 820 mV Feedback Voltage Line Regulation VIN = 7V to 100V, VOUT = 5V, ILOAD = 500mA 0.01 0.2 %/V Feedback Voltage Load Regulation VIN = 15V, VOUT = 5V, ILOAD = 100mA to 1A –1.5 –0.3 %/A Track/Soft-Start Source Current VFB = 0.9V, VTR/SS = 0V –6.5 –4.5 –2.5 µA Track/Soft-Start VOH VFB = 0.9V 2.9 3.0 3.2 V Track/Soft-Start Sink Current VFB = 0.7V, VTR/SS = 1V 15 30 45 µA Track/Soft-Start VOL VFB = 0V 50 75 mV Track/Soft-Start to Feedback Offset VTR/SS = 0.4V, VVOUT = 5V, ILOAD = 100mA –25 5 25 mV Track/Soft-Start Sink Current POR (Note 4) VFB = 0.9V, VTR/SS = 0.2V 180 230 µA PG Leakage Current VFB = 0V, VPG = 100V –200 0 200 nA PG Lower Threshold % of VFBREF (Note 5) VFB Rising l –10.5 –7.5 –4.5 % PG Upper Threshold % of VFBREF (Note 5) VFB Falling l 4.5 7.5 10.5 % PG Hysterisis (Note 5) 1.4 1.9 2.3 % PG Sink Current VFB = 0.7V, VPG = 0.2V 980 µA Switching Frequency RRT =187kΩ, VVOUT = 5V, ILOAD = 100mA 75 100 125 kHz RRT = 19.6kΩ, VVOUT = 5V, ILOAD = 100mA l 460 500 540 kHz RRT = 8.66kΩ, VVOUT = 5V, ILOAD = 100mA 925 1000 1075 kHz Minimum Switch ON Time VIN = 15V to 25V, RRT = 8.66kΩ, VVOUT = 1.5V, ILOAD = 500mA 100 120 ns Minimum Switch OFF Time VIN = 5V, RRT = 8.66kΩ, VVOUT = 5V, ILOAD = 500mA 190 ns IND to VOUT Burst Current (Note 6) 280 mA IND to VOUT Peak Current (Note 7) 1.4 2.1 2.8 A Maximum VOUT Current in Regulation VIN = 7.5V, RRT = 19.6kΩ, VVOUT = 5V, L = 15µH l 1.00 1.35 1.8 A VIN = 50V, RRT = 19.6kΩ, VVOUT = 5V, L = 15µH 1.2 1.8 2.4 A Switch Pin Leakage Current VSW = 0V, VEN/UV = 0V 50 500 nA VSW = 100V, VIN =100V, VEN/UV = 0V 0.5 2.0 µA Top Switch On-Resistance 775 mΩ Bottom Switch On-Resistance 550 mΩ BST Pin Current VBST = 18V 180 µA 8631fb For more information www.linear.com/LT8631 3
