Datasheet LT3597 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 60V Triple Step-Down LED Driver |
| Pages / Page | 24 / 3 — elecTrical characTerisTics. The. denotes the specifications which apply … |
| File Format / Size | PDF / 405 Kb |
| Document Language | English |
elecTrical characTerisTics. The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
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LT3597
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, BOOST = 29V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V, CTRL1-3 = CTRLM = TSET = 2.0V, VOUT1-3 = 24V, SYNC = 0V, unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage l 6 55 V Quiescent Current from VIN EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 2.1 4 mA BIAS = 0V, Not Switching 4 6 mA Minimum BIAS Voltage 3 3.1 V Quiescent Current from BIAS EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 2 3 mA BIAS = 0V, Not Switching, Current Out of Pin 60 150 µA EN Threshold (Falling) 0.4 0.7 V UVLO Threshold (Falling) 1.47 1.51 1.53 V EN/UVLO Pin Current (Hysteresis) EN/UVLO = 1.6V 10 nA EN/UVLO = 1.4V 4 5.1 6 µA FB1-3 Regulation Voltage 1.15 1.22 1.25 V FB1-3 Pin Bias Current FB = 6V 200 nA Maximum Duty Cycle RT = 220k (200kHz) 90 95 % RT = 33.2k (1MHz) 78 85 % Switch Saturation Voltage ISW1-3 = 100mA 265 mV Switch Current Limit 400 510 700 mA DA Pin Current to Stop OSC 225 280 350 mA Switch Leakage VSW1-3 = 0V 700 nA BST1-3 Pin Current ISW1-3 = 100mA 2 mA Switching Frequency RT = 220k 170 200 230 kHz RT = 33.2k 900 1000 1100 kHz SYNC Input Low 0.4 V SYNC Input High 1.6 V SYNC Frequency Range RT = 220k 240 kHz RT = 47k 1000 kHz SYNC Pin Bias Current VSYNC = 3.3V 200 nA Soft-Start Time (Note 4) 2.5 ms VREF Voltage IVREF = 0µA l 1.96 2.0 2.04 V Maximum VREF Current 200 µA ISET1-3 Pin Voltage RISET1-3 = 20k, VCTRL = VCTRLM = TSET = 1.5V 1.0 V TSET Voltage for LED Current Derating 540 mV TSET Pin Leakage Current VTSET = 1.0V 200 nA ILED1-3 LED Current RISET1-3 = 20k 98 100 102 mA l 97 100 103 mA 3597fa 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History 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 = 24V, BOOST = 29V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V, CTRL1-3 = CTRLM = TSET = 2.0V, VOUT1-3 = 24V, SYNC = 0V, unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage l 6 55 V Quiescent Current from VIN EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 2.1 4 mA BIAS = 0V, Not Switching 4 6 mA Minimum BIAS Voltage 3 3.1 V Quiescent Current from BIAS EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 2 3 mA BIAS = 0V, Not Switching, Current Out of Pin 60 150 µA EN Threshold (Falling) 0.4 0.7 V UVLO Threshold (Falling) 1.47 1.51 1.53 V EN/UVLO Pin Current (Hysteresis) EN/UVLO = 1.6V 10 nA EN/UVLO = 1.4V 4 5.1 6 µA FB1-3 Regulation Voltage 1.15 1.22 1.25 V FB1-3 Pin Bias Current FB = 6V 200 nA Maximum Duty Cycle RT = 220k (200kHz) 90 95 % RT = 33.2k (1MHz) 78 85 % Switch Saturation Voltage ISW1-3 = 100mA 265 mV Switch Current Limit 400 510 700 mA DA Pin Current to Stop OSC 225 280 350 mA Switch Leakage VSW1-3 = 0V 700 nA BST1-3 Pin Current ISW1-3 = 100mA 2 mA Switching Frequency RT = 220k 170 200 230 kHz RT = 33.2k 900 1000 1100 kHz SYNC Input Low 0.4 V SYNC Input High 1.6 V SYNC Frequency Range RT = 220k 240 kHz RT = 47k 1000 kHz SYNC Pin Bias Current VSYNC = 3.3V 200 nA Soft-Start Time (Note 4) 2.5 ms VREF Voltage IVREF = 0µA l 1.96 2.0 2.04 V Maximum VREF Current 200 µA ISET1-3 Pin Voltage RISET1-3 = 20k, VCTRL = VCTRLM = TSET = 1.5V 1.0 V TSET Voltage for LED Current Derating 540 mV TSET Pin Leakage Current VTSET = 1.0V 200 nA ILED1-3 LED Current RISET1-3 = 20k 98 100 102 mA l 97 100 103 mA 3597fa 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
