Datasheet LTC3832, LTC3832-1 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation |
| Seiten / Seite | 24 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Maximum G1 Duty Cycle. IMAX Sink … |
| Dateiformat / Größe | PDF / 329 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. Maximum G1 Duty Cycle. IMAX Sink Current. vs Temperature. Output Overcurrent Protection
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LTC3832/LTC3832-1
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum G1 Duty Cycle IMAX Sink Current vs Temperature vs Temperature Output Overcurrent Protection
100 20 3.0 VFB = 0V TA = 25°C 99 REFER TO FIGURE 3 REFER TO FIGURE 12 18 2.5 98 µA) 16 97 2.0 14 96 12 1.5 95 10 94 SINK CURRENT ( 1.0 OUTPUT VOLTAGE (V) 93 I MAX 8 MAXIMUM G1 DUTY CYCLE (%) 0.5 92 6 91 4 0 –50 –25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 20 TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT CURRENT (A) 3832 G10 3832 G11 3832 G12
Output Current Limit Threshold Soft-Start Source Current Soft-Start Sink Current vs Temperature vs Temperature vs (VIFB – VIMAX)
20 –8 2.00 REFER TO FIGURE 12 AND NOTE 10 OF TA = 25°C 19 THE ELECTRICAL CHARACTERISTICS µA) –9 1.75 18 –10 1.50 17 –11 1.25 16 15 –12 1.00 14 –13 0.75 13 –14 0.50 OUTPUT CURRENT LIMIT (A) 12 SOFT-START SINK CURRENT (mA) SOFT-START SOURCE CURRENT ( –15 0.25 11 10 –16 0 –50 –25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 –150 –125 –100 –75 –50 –25 0 TEMPERATURE (°C) TEMPERATURE (°C) VIFB – VIMAX (mV) 3832 G13 3830 G14 3832 G15
Undervoltage Lockout Threshold VCC Operating Supply Current PVCC Supply Current Voltage vs Temperature vs Temperature vs Oscillator Frequency
3.0 1.6 90 FREQSET FLOATING TA = 25°C 2.9 1.5 80 1.4 G1 AND G2 LOADED 2.8 70 WITH 6800pF, 1.3 2.7 PVCC1,2 = 12V 1.2 60 2.6 1.1 50 G1 AND G2 G1 AND G2 2.5 1.0 LOADED LOADED 40 WITH 6800pF, 2.4 0.9 WITH 1000pF, PVCC1,2 = 5V 0.8 30 PVCC1,2 = 5V 2.3 SUPPLY CURRENT (mA) 0.7 CC 2.2 20 PV OPERATING SUPPLY CURRENT (mA) 0.6 2.1 CC 10 V 0.5 2.0 0.4 0 –50 UNDERVOLTAGE LOCKOUT THRESHOLD VOLTAGE (V) –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) OSCILLATOR FREQUENCY (kHz) 3832 G16 3832 G17 3832 G18 sn3832 3832fs 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum G1 Duty Cycle IMAX Sink Current vs Temperature vs Temperature Output Overcurrent Protection
100 20 3.0 VFB = 0V TA = 25°C 99 REFER TO FIGURE 3 REFER TO FIGURE 12 18 2.5 98 µA) 16 97 2.0 14 96 12 1.5 95 10 94 SINK CURRENT ( 1.0 OUTPUT VOLTAGE (V) 93 I MAX 8 MAXIMUM G1 DUTY CYCLE (%) 0.5 92 6 91 4 0 –50 –25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 20 TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT CURRENT (A) 3832 G10 3832 G11 3832 G12
Output Current Limit Threshold Soft-Start Source Current Soft-Start Sink Current vs Temperature vs Temperature vs (VIFB – VIMAX)
20 –8 2.00 REFER TO FIGURE 12 AND NOTE 10 OF TA = 25°C 19 THE ELECTRICAL CHARACTERISTICS µA) –9 1.75 18 –10 1.50 17 –11 1.25 16 15 –12 1.00 14 –13 0.75 13 –14 0.50 OUTPUT CURRENT LIMIT (A) 12 SOFT-START SINK CURRENT (mA) SOFT-START SOURCE CURRENT ( –15 0.25 11 10 –16 0 –50 –25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 –150 –125 –100 –75 –50 –25 0 TEMPERATURE (°C) TEMPERATURE (°C) VIFB – VIMAX (mV) 3832 G13 3830 G14 3832 G15
Undervoltage Lockout Threshold VCC Operating Supply Current PVCC Supply Current Voltage vs Temperature vs Temperature vs Oscillator Frequency
3.0 1.6 90 FREQSET FLOATING TA = 25°C 2.9 1.5 80 1.4 G1 AND G2 LOADED 2.8 70 WITH 6800pF, 1.3 2.7 PVCC1,2 = 12V 1.2 60 2.6 1.1 50 G1 AND G2 G1 AND G2 2.5 1.0 LOADED LOADED 40 WITH 6800pF, 2.4 0.9 WITH 1000pF, PVCC1,2 = 5V 0.8 30 PVCC1,2 = 5V 2.3 SUPPLY CURRENT (mA) 0.7 CC 2.2 20 PV OPERATING SUPPLY CURRENT (mA) 0.6 2.1 CC 10 V 0.5 2.0 0.4 0 –50 UNDERVOLTAGE LOCKOUT THRESHOLD VOLTAGE (V) –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) OSCILLATOR FREQUENCY (kHz) 3832 G16 3832 G17 3832 G18 sn3832 3832fs 5