Datasheet LT3781 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Bootstrap Start Dual Transistor Synchronous Forward Controller |
| Pages / Page | 20 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. IBST Boost Supply Current. ICC … |
| File Format / Size | PDF / 260 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. IBST Boost Supply Current. ICC Supply Current. UVLO ICC Supply Current. vs Temperature
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LT3781
W U TYPICAL PERFOR A CE CHARACTERISTICS IBST Boost Supply Current ICC Supply Current UVLO ICC Supply Current vs Temperature vs SHDN Pin Voltage vs Temperature
5.2 60 1 TA = 25°C 5.1 µA) 40 0.8 5.0 20 SUPPLY CURRENT (mA) SUPPLY CURRENT ( CC 4.9 BOOST SUPPLY CURRENT (mA) I CC 0.6 I BST UVLO I 4.8 0 0.5 –55 –40 0 40 80 125 0 0.2 0.4 0.6 0.8 1.0 1.2 –55 –40 0 40 80 125 TEMPERATURE (°C) SHDN PIN VOLTAGE (V) TEMPERATURE (°C) 3781 G04 3781 G05 3781 G06
5VREF Short-Circuit Current Limit Error Amp Reference 5VREF Voltage vs Temperature vs Temperature vs Temperature
5.10 60 1.260 5.05 1.255 50 5.00 1.250 VOLTAGE (V) REF 5V 40 4.95 1.245 ERROR AMP REFERENCE (V) SHORT-CIRCUIT CURRENT LIMIT (mA) REF 5V 4.90 30 1.240 –55 –40 0 40 80 125 –55 –40 0 40 80 125 –55 –40 0 40 80 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3781 G07 3781 G08 3781 G09
VC Pin Short-Circuit Current Limit Soft-Start Output Current Soft-Start Output Current vs Temperature vs Temperature vs Soft-Start Pin Voltage
25 12 60 VSS = 2V TA = 25°C µA) µA) 11 20 40 10 15 20 9 SOFT-START OUTPUT CURRENT ( SOFT-START OUTPUT CURRENT ( PIN SHORT-CIRCUIT CURRENT LIMIT (mA) CV 10 8 0 –55 –40 0 40 80 125 –55 –40 0 40 80 125 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) SOFT-START PIN VOLTAGE (mV) 3781 G10 3781 G11 3781 G12 3781f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS IBST Boost Supply Current ICC Supply Current UVLO ICC Supply Current vs Temperature vs SHDN Pin Voltage vs Temperature
5.2 60 1 TA = 25°C 5.1 µA) 40 0.8 5.0 20 SUPPLY CURRENT (mA) SUPPLY CURRENT ( CC 4.9 BOOST SUPPLY CURRENT (mA) I CC 0.6 I BST UVLO I 4.8 0 0.5 –55 –40 0 40 80 125 0 0.2 0.4 0.6 0.8 1.0 1.2 –55 –40 0 40 80 125 TEMPERATURE (°C) SHDN PIN VOLTAGE (V) TEMPERATURE (°C) 3781 G04 3781 G05 3781 G06
5VREF Short-Circuit Current Limit Error Amp Reference 5VREF Voltage vs Temperature vs Temperature vs Temperature
5.10 60 1.260 5.05 1.255 50 5.00 1.250 VOLTAGE (V) REF 5V 40 4.95 1.245 ERROR AMP REFERENCE (V) SHORT-CIRCUIT CURRENT LIMIT (mA) REF 5V 4.90 30 1.240 –55 –40 0 40 80 125 –55 –40 0 40 80 125 –55 –40 0 40 80 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3781 G07 3781 G08 3781 G09
VC Pin Short-Circuit Current Limit Soft-Start Output Current Soft-Start Output Current vs Temperature vs Temperature vs Soft-Start Pin Voltage
25 12 60 VSS = 2V TA = 25°C µA) µA) 11 20 40 10 15 20 9 SOFT-START OUTPUT CURRENT ( SOFT-START OUTPUT CURRENT ( PIN SHORT-CIRCUIT CURRENT LIMIT (mA) CV 10 8 0 –55 –40 0 40 80 125 –55 –40 0 40 80 125 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) SOFT-START PIN VOLTAGE (mV) 3781 G10 3781 G11 3781 G12 3781f 5
