Datasheet LTC7812 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Low IQ, 38V Synchronous Boost+Buck Controller |
| Pages / Page | 44 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. VIN = … |
| File Format / Size | PDF / 2.3 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. VIN = 9V. VIN = 14V. VIN = 18V. Power Loss vs Load Current
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Text Version of Document
LTC7812
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current VIN = 9V VIN = 14V VIN = 18V
100 100 100 FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT 90 VOUT = 12V 90 VOUT = 12V 90 VOUT = 12V 80 Burst Mode 80 80 Burst Mode 70 OPERATION 70 70 OPERATION Burst Mode FORCED 60 60 OPERATION CONTINUOUS 60 FORCED 50 50 MODE 50 CONTINUOUS PULSE-SKIPPING MODE 40 40 40 EFFICIENCY (%) MODE FORCED EFFICIENCY (%) EFFICIENCY (%) 30 PULSE-SKIPPING CONTINUOUS 30 30 PULSE-SKIPPING MODE 20 MODE 20 MODE 20 10 10 10 0 0 0 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 7812 G01 7812 G02 7812 G03
Power Loss vs Load Current Power Loss vs Load Current Power Loss vs Load Current VIN = 9V VIN = 14V VIN = 18V
10 10 10 FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT FORCED CONTINUOUS MODE VOUT = 12V VOUT = 12V FORCED CONTINUOUS MODE 1 1 FORCED CONTINUOUS MODE 1 PULSE-SKIPPING PULSE-SKIPPING PULSE-SKIPPING 0.1 MODE 0.1 MODE 0.1 MODE Burst Mode Burst Mode POWER LOSS (W) OPERATION POWER LOSS (W) OPERATION POWER LOSS (W) Burst Mode 0.01 0.01 0.01 OPERATION FIGURE 9 CIRCUIT VOUT = 12V 0.001 0.001 0.001 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 7812 G04 7812 G05 7812 G06
Buck Regulated Feedback Voltage Boost Regulated Feedback Efficiency vs Input Voltage vs Temperature Voltage vs Temperature
100 808 1.212 FIGURE 9 CIRCUIT IOUT = 4A VOUT = 12V IOUT = 8A 806 1.209 98 804 1.206 TAGE (mV) TAGE (V) 97 802 1.203 95 800 1.200 EFFICIENCY (%) 798 1.197 93 TED FEEDBACK VOL TED FEEDBACK VOL 796 1.194 92 REGULA 794 REGULA 1.191 90 792 1.188 0 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 120 150 INPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 7812 G07 7812 G08 7812 G09 7812fc 6 For more information www.linear.com/LTC7812 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current VIN = 9V VIN = 14V VIN = 18V
100 100 100 FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT 90 VOUT = 12V 90 VOUT = 12V 90 VOUT = 12V 80 Burst Mode 80 80 Burst Mode 70 OPERATION 70 70 OPERATION Burst Mode FORCED 60 60 OPERATION CONTINUOUS 60 FORCED 50 50 MODE 50 CONTINUOUS PULSE-SKIPPING MODE 40 40 40 EFFICIENCY (%) MODE FORCED EFFICIENCY (%) EFFICIENCY (%) 30 PULSE-SKIPPING CONTINUOUS 30 30 PULSE-SKIPPING MODE 20 MODE 20 MODE 20 10 10 10 0 0 0 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 7812 G01 7812 G02 7812 G03
Power Loss vs Load Current Power Loss vs Load Current Power Loss vs Load Current VIN = 9V VIN = 14V VIN = 18V
10 10 10 FIGURE 9 CIRCUIT FIGURE 9 CIRCUIT FORCED CONTINUOUS MODE VOUT = 12V VOUT = 12V FORCED CONTINUOUS MODE 1 1 FORCED CONTINUOUS MODE 1 PULSE-SKIPPING PULSE-SKIPPING PULSE-SKIPPING 0.1 MODE 0.1 MODE 0.1 MODE Burst Mode Burst Mode POWER LOSS (W) OPERATION POWER LOSS (W) OPERATION POWER LOSS (W) Burst Mode 0.01 0.01 0.01 OPERATION FIGURE 9 CIRCUIT VOUT = 12V 0.001 0.001 0.001 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 0.0001 0.001 0.01 0.1 1 9 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 7812 G04 7812 G05 7812 G06
Buck Regulated Feedback Voltage Boost Regulated Feedback Efficiency vs Input Voltage vs Temperature Voltage vs Temperature
100 808 1.212 FIGURE 9 CIRCUIT IOUT = 4A VOUT = 12V IOUT = 8A 806 1.209 98 804 1.206 TAGE (mV) TAGE (V) 97 802 1.203 95 800 1.200 EFFICIENCY (%) 798 1.197 93 TED FEEDBACK VOL TED FEEDBACK VOL 796 1.194 92 REGULA 794 REGULA 1.191 90 792 1.188 0 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 120 150 INPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 7812 G07 7812 G08 7812 G09 7812fc 6 For more information www.linear.com/LTC7812 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Typical Application Related Parts
