Datasheet LTC3802 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking |
| Pages / Page | 28 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. Efficiency vs IOUT. Efficiency vs … |
| File Format / Size | PDF / 359 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Efficiency vs IOUT. Efficiency vs VIN. Load Regulation. Line Regulation. VFB vs Temperature
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Text Version of Document
LTC3802
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs IOUT Efficiency vs VIN Load Regulation
100 100 2.5125 0.5 Burst Mode T V 95 A = 25°C IN = 12V OPERATION 98 CIRCUIT ON THE FIRST PAGE T 0.4 A = 25°C 90 OF THIS DATA SHEET CIRCUIT ON THE FIRST PAGE 96 2.5075 0.3 85 OF THIS DATA SHEET 80 94 VOUT = 2.5V 0.2 CONTINUOUS IOUT = 5A ∆ 75 92 2.5025 0.1 V MODE OUT (V) 70 V 90 OUT = 2.5V 0 (%) IOUT = 10A OUT 65 V 88 2.4975 –0.1 EFFICIENCY (%) 60 EFFICIENCY (%) V 86 –0.2 55 IN = 12V VOUT = 3.3V 84 50 2.4925 –0.3 TA = 25°C 45 CIRCUIT ON THE FIRST PAGE 82 –0.4 OF THIS DATA SHEET 40 80 2.4875 –0.5 0.1 1 10 100 0 5 10 15 20 25 30 0 5 10 15 20 IOUT (A) VIN (V) IOUT (A) 3802 G01 3802 G02 3802 G03
Line Regulation VFB vs Temperature
2.5125 0.5 606.0 1.0 VCC = 5V VCC = 5V I 0.4 604.8 0.8 OUT = 5A T 2.5075 A = 25°C 0.3 603.6 0.6 0.2 602.4 0.4 ∆ 2.5025 0.1 V ∆ 601.2 0.2 OUT V (V) FB 0 (%) (mV) (%) 600.0 0 OUTV FB 2.4975 –0.1 V 598.8 –0.2 –0.2 597.6 –0.4 2.4925 –0.3 596.4 –0.6 –0.4 595.2 –0.8 2.4875 –0.5 594.0 –1.0 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) 3802 G04 LTC1323 • TPC05
VFB vs VCC Supply Voltage Line Feedforward Transient
603.0 0.5 TA = 25°C 602.4 0.4 VOUT 2.5V 601.8 0.3 (NO LOAD) 601.2 0.2 AC 50mV/DIV ∆ 600.6 0.1 V VCOMP FB AC 50mV/DIV (mV) (%) 600.0 0 FBV599.4 –0.1 V 598.8 –0.2 IN 5V TO 15V 598.2 –0.3 STEP 5V/DIV 597.6 –0.4 597.0 –0.5 3 3.5 4 4.5 5 5.5 6 CIN: 1µF/50V ×6 10µs/DIV 3802 G07 VCC SUPPLY VOLTAGE (V) SANYO 35CV220AX 3802 G06 3802f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs IOUT Efficiency vs VIN Load Regulation
100 100 2.5125 0.5 Burst Mode T V 95 A = 25°C IN = 12V OPERATION 98 CIRCUIT ON THE FIRST PAGE T 0.4 A = 25°C 90 OF THIS DATA SHEET CIRCUIT ON THE FIRST PAGE 96 2.5075 0.3 85 OF THIS DATA SHEET 80 94 VOUT = 2.5V 0.2 CONTINUOUS IOUT = 5A ∆ 75 92 2.5025 0.1 V MODE OUT (V) 70 V 90 OUT = 2.5V 0 (%) IOUT = 10A OUT 65 V 88 2.4975 –0.1 EFFICIENCY (%) 60 EFFICIENCY (%) V 86 –0.2 55 IN = 12V VOUT = 3.3V 84 50 2.4925 –0.3 TA = 25°C 45 CIRCUIT ON THE FIRST PAGE 82 –0.4 OF THIS DATA SHEET 40 80 2.4875 –0.5 0.1 1 10 100 0 5 10 15 20 25 30 0 5 10 15 20 IOUT (A) VIN (V) IOUT (A) 3802 G01 3802 G02 3802 G03
Line Regulation VFB vs Temperature
2.5125 0.5 606.0 1.0 VCC = 5V VCC = 5V I 0.4 604.8 0.8 OUT = 5A T 2.5075 A = 25°C 0.3 603.6 0.6 0.2 602.4 0.4 ∆ 2.5025 0.1 V ∆ 601.2 0.2 OUT V (V) FB 0 (%) (mV) (%) 600.0 0 OUTV FB 2.4975 –0.1 V 598.8 –0.2 –0.2 597.6 –0.4 2.4925 –0.3 596.4 –0.6 –0.4 595.2 –0.8 2.4875 –0.5 594.0 –1.0 0 5 10 15 20 25 30 –50 –25 0 25 50 75 100 125 VIN (V) TEMPERATURE (°C) 3802 G04 LTC1323 • TPC05
VFB vs VCC Supply Voltage Line Feedforward Transient
603.0 0.5 TA = 25°C 602.4 0.4 VOUT 2.5V 601.8 0.3 (NO LOAD) 601.2 0.2 AC 50mV/DIV ∆ 600.6 0.1 V VCOMP FB AC 50mV/DIV (mV) (%) 600.0 0 FBV599.4 –0.1 V 598.8 –0.2 IN 5V TO 15V 598.2 –0.3 STEP 5V/DIV 597.6 –0.4 597.0 –0.5 3 3.5 4 4.5 5 5.5 6 CIN: 1µF/50V ×6 10µs/DIV 3802 G07 VCC SUPPLY VOLTAGE (V) SANYO 35CV220AX 3802 G06 3802f 5
