Datasheet LTC3605A (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 20V, 5A Synchronous Step-Down Regulator |
| Pages / Page | 22 / 5 — Typical perForMance characTerisTics TA = 25°C unless otherwise specified. … |
| File Format / Size | PDF / 424 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C unless otherwise specified. Switching Frequency vs RT. Switch Leakage vs VIN
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LTC3605A
Typical perForMance characTerisTics TA = 25°C unless otherwise specified. Switching Frequency vs RT Switch Leakage vs VIN Efficiency vs VIN
4.5 350 96 VOUT = 3.3V 4.0 300 94 3.5 250 92 3.0 ILOAD = 1A 90 2.5 200 88 2.0 150 EFFICIENCY (%) 86 FREQUENCY (MHz) 1.5 I SWITCH LEAKAGE (nA) 100 LOAD = 5A 1.0 84 50 0.5 82 0 0 80 0 50 100 150 200 250 300 350 400 450 500 0 2 4 6 8 10 12 14 16 18 20 0 5 10 15 20 25 RT (kΩ) VIN (V) VIN (V) 3605A G10 3605A G11 3505A G12
Frequency vs VON Voltage Current Limit Foldback INTVCC Load Regulation
3.0 120 101 VIN = 20V TA = 25°C R 100 T = 162k 2.5 100 99 (%) 98 2.0 80 CC 97 96 1.5 60 95 94 FREQUENCY (MHz) 1.0 40 93 NORMALIZED INTV 0.5 20 92 91 0 NORMALIZED MAXIMUM OUTPUT CURRENT (%) 0 90 0 2 4 6 8 10 12 14 16 18 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 20 40 60 80 100 120 140 VON (V) VFB (V) INTVCC OUTPUT CURRENT (mA) 3605A G13 3605A G14 3605A G15
RUN Pin Threshold vs Temperature DCM Operation CCM Operation
1.30 CLKOUT CLKOUT 1.25 2V/DIV 2V/DIV 1.20 V V SW SW 5V/DIV 5V/DIV 1.15 I 1.10 L IL RUN THRESHOLD (V) 2A/DIV 2A/DIV 1.05 400ns/DIV 3605A G17 VIN = 20V 400ns/DIV 3605A G18 VIN = 20V V V OUT = 2.5V OUT = 2.5V 1.00 MODE = 0V MODE = 3.3V –40 –15 10 35 60 85 110 I I OUT = 0A OUT = 0A TEMPERATURE (°C) L1 = 0.5µH L1 = 0.5µH 3605A G16 3605afg For more information www.linear.com/LTC3605A 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C unless otherwise specified. Switching Frequency vs RT Switch Leakage vs VIN Efficiency vs VIN
4.5 350 96 VOUT = 3.3V 4.0 300 94 3.5 250 92 3.0 ILOAD = 1A 90 2.5 200 88 2.0 150 EFFICIENCY (%) 86 FREQUENCY (MHz) 1.5 I SWITCH LEAKAGE (nA) 100 LOAD = 5A 1.0 84 50 0.5 82 0 0 80 0 50 100 150 200 250 300 350 400 450 500 0 2 4 6 8 10 12 14 16 18 20 0 5 10 15 20 25 RT (kΩ) VIN (V) VIN (V) 3605A G10 3605A G11 3505A G12
Frequency vs VON Voltage Current Limit Foldback INTVCC Load Regulation
3.0 120 101 VIN = 20V TA = 25°C R 100 T = 162k 2.5 100 99 (%) 98 2.0 80 CC 97 96 1.5 60 95 94 FREQUENCY (MHz) 1.0 40 93 NORMALIZED INTV 0.5 20 92 91 0 NORMALIZED MAXIMUM OUTPUT CURRENT (%) 0 90 0 2 4 6 8 10 12 14 16 18 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0 20 40 60 80 100 120 140 VON (V) VFB (V) INTVCC OUTPUT CURRENT (mA) 3605A G13 3605A G14 3605A G15
RUN Pin Threshold vs Temperature DCM Operation CCM Operation
1.30 CLKOUT CLKOUT 1.25 2V/DIV 2V/DIV 1.20 V V SW SW 5V/DIV 5V/DIV 1.15 I 1.10 L IL RUN THRESHOLD (V) 2A/DIV 2A/DIV 1.05 400ns/DIV 3605A G17 VIN = 20V 400ns/DIV 3605A G18 VIN = 20V V V OUT = 2.5V OUT = 2.5V 1.00 MODE = 0V MODE = 3.3V –40 –15 10 35 60 85 110 I I OUT = 0A OUT = 0A TEMPERATURE (°C) L1 = 0.5µH L1 = 0.5µH 3605A G16 3605afg For more information www.linear.com/LTC3605A 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts
