Datasheet LTC7803 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum |
| Pages / Page | 36 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency and Power Loss. vs Output … |
| File Format / Size | PDF / 1.6 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency and Power Loss. vs Output Current. Efficiency vs Output Current
Model Line for this Datasheet
- LTC7803EMSE#PBF LTC7803EMSE#TRPBF LTC7803EMSE#WPBF LTC7803EMSE#WTRPBF LTC7803EUD#PBF LTC7803EUD#TRPBF LTC7803EUD#WPBF LTC7803EUD#WTRPBF LTC7803HMSE#PBF LTC7803HMSE#TRPBF LTC7803HMSE#WPBF LTC7803HMSE#WTRPBF LTC7803HUD#PBF LTC7803HUD#TRPBF LTC7803HUD#WPBF LTC7803HUD#WTRPBF LTC7803IMSE#PBF LTC7803IMSE#TRPBF LTC7803IMSE#WPBF LTC7803IMSE#WTRPBF LTC7803IUD#PBF LTC7803IUD#TRPBF LTC7803IUD#WPBF LTC7803IUD#WTRPBF LTC7803JMSE#PBF LTC7803JMSE#TRPBF LTC7803JMSE#WPBF LTC7803JMSE#WTRPBF LTC7803JUD#PBF LTC7803JUD#TRPBF LTC7803JUD#WPBF LTC7803JUD#WTRPBF
Text Version of Document
LTC7803
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency and Power Loss Efficiency and Power Loss vs Output Current vs Output Current Efficiency vs Output Current Efficiency vs Output Current Efficiency vs Input V Efficiency vs Input V oltage oltage
100 100k 100 10k BURST EFFICIENCY V 100 OUT = 3.3V 90 90 PULSE–SKIPPING I 95 LOAD = 10A 80 10k 1k EFFICIENCY FCM LOSS POWER LOSS (mW) 70 80 FCM EFFICIENCY 90 60 1k 70 100 50 85 40 100 60 10 ILOAD = 1mA EFFICIENCY (%) PULSE–SKIPPING EFFICIENCY (%) EFFICIENCY (%) 30 VIN = 12V 80 LOSS 50 BURST LOSS VIN = 24V 20 V V 10 IN = 36V 1 IN = 12V 40 75 10 VOUT = 3.3V BURST MODE OPERATION VOUT = 3.3V FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT 0 1 30 0.1 70 0.001 0.01 0.1 1 10 20 0.0001 0.001 0.01 0.1 1 10 0 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 7803 G01 7803 G02 7803 G03
Load Step Load Step Load Step Load Step Burst Mode Operation Burst Mode Operation Load Step Pulse-Skipping Mode Pulse–Skipping Mode Load Step Forced Continuous Mode Forced Continuous Mode
LOAD STEP LOAD STEP LOAD STEP 5A/DIV 5A/DIV 5A/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 5A/DIV 5A/DIV 5A/DIV VOUT VOUT VOUT 200mV/DIV 200mV/DIV 200mV/DIV VIN = 12V 100µs/DIV VIN = 12V 100µs/DIV VIN = 12V 100µs/DIV VOUT=3.3V VOUT=3.3V VOUT=3.3V 200mA TO 10A LOAD STEP 7803 G04 200mA TO 10A LOAD STEP 7803 G05 200mA TO 10A LOAD STEP 7803 G06 FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
Regulated Feedback V Regulated Feedback V oltage vs oltage Inductor Current at Light Load Inductor Current at Light Load Soft Start-Up Soft Start–Up Temperature vs Temperature
0.808 0.806 FORCED CONTINUOUS 0.804 TAGE (V) MODE 0.802 5A/DIV VOUT 1V/DIV 0.800 Burst MODE OPERATION 0.798 TED FEFEDBACK VOL 0.796 PULSE– 0V SKIPPING REGULA 0.794 MODE 0.792 VIN = 6V 5µs/DIV VIN = 12V 2ms/DIV –55 25 5 35 65 95 125 155 VOUT=3.3V VOUT=3.3V TEMPRATURE (°C) ILOAD=200uA 7803 G07 FIGURE 11 CIRCUIT 7803 G08 7803 G09 FIGURE 11 CIRCUIT Rev 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency and Power Loss Efficiency and Power Loss vs Output Current vs Output Current Efficiency vs Output Current Efficiency vs Output Current Efficiency vs Input V Efficiency vs Input V oltage oltage
100 100k 100 10k BURST EFFICIENCY V 100 OUT = 3.3V 90 90 PULSE–SKIPPING I 95 LOAD = 10A 80 10k 1k EFFICIENCY FCM LOSS POWER LOSS (mW) 70 80 FCM EFFICIENCY 90 60 1k 70 100 50 85 40 100 60 10 ILOAD = 1mA EFFICIENCY (%) PULSE–SKIPPING EFFICIENCY (%) EFFICIENCY (%) 30 VIN = 12V 80 LOSS 50 BURST LOSS VIN = 24V 20 V V 10 IN = 36V 1 IN = 12V 40 75 10 VOUT = 3.3V BURST MODE OPERATION VOUT = 3.3V FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT 0 1 30 0.1 70 0.001 0.01 0.1 1 10 20 0.0001 0.001 0.01 0.1 1 10 0 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) OUTPUT CURRENT (A) INPUT VOLTAGE (V) 7803 G01 7803 G02 7803 G03
Load Step Load Step Load Step Load Step Burst Mode Operation Burst Mode Operation Load Step Pulse-Skipping Mode Pulse–Skipping Mode Load Step Forced Continuous Mode Forced Continuous Mode
LOAD STEP LOAD STEP LOAD STEP 5A/DIV 5A/DIV 5A/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 5A/DIV 5A/DIV 5A/DIV VOUT VOUT VOUT 200mV/DIV 200mV/DIV 200mV/DIV VIN = 12V 100µs/DIV VIN = 12V 100µs/DIV VIN = 12V 100µs/DIV VOUT=3.3V VOUT=3.3V VOUT=3.3V 200mA TO 10A LOAD STEP 7803 G04 200mA TO 10A LOAD STEP 7803 G05 200mA TO 10A LOAD STEP 7803 G06 FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
Regulated Feedback V Regulated Feedback V oltage vs oltage Inductor Current at Light Load Inductor Current at Light Load Soft Start-Up Soft Start–Up Temperature vs Temperature
0.808 0.806 FORCED CONTINUOUS 0.804 TAGE (V) MODE 0.802 5A/DIV VOUT 1V/DIV 0.800 Burst MODE OPERATION 0.798 TED FEFEDBACK VOL 0.796 PULSE– 0V SKIPPING REGULA 0.794 MODE 0.792 VIN = 6V 5µs/DIV VIN = 12V 2ms/DIV –55 25 5 35 65 95 125 155 VOUT=3.3V VOUT=3.3V TEMPRATURE (°C) ILOAD=200uA 7803 G07 FIGURE 11 CIRCUIT 7803 G08 7803 G09 FIGURE 11 CIRCUIT Rev 0 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts
