Datasheet LTC3638 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Efficiency, 140V 250mA Step-Down Regulator |
| Pages / Page | 26 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current,. VOUT = … |
| File Format / Size | PDF / 624 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current,. VOUT = 5V. VOUT = 3.3V. VOUT = 1.8V
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LTC3638
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current, Efficiency vs Load Current, Efficiency vs Load Current, VOUT = 5V VOUT = 3.3V VOUT = 1.8V
100 100 100 FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 V 20 20 IN = 12V VIN = 12V VIN = 12V 10 VIN = 48V 10 VIN = 48V 10 VIN = 48V V V V 0 IN = 140V IN = 140V 0 IN = 140V 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3638 G01 3638 G02 3638 G03
Efficiency vs Input Voltage, Feedback Comparator Trip RUN and OVLO Thresholds vs VOUT = 5V Threshold vs Temperature Temperature
100 802 FIGURE 14 CIRCUIT 1.24 90 1.22 RISING 80 801 1.20 70 60 1.18 50 800 1.16 40 1.14 EFFICIENCY (%) 30 1.12 799 FALLING 20 THRESHOLD VOLTAGE (mV) 1.10 ILOAD = 250mA 10 ILOAD = 10mA 1.08 I RUN OR OVLO THRESHOLD VOLTAGE (V) LOAD = 1mA 0 798 1.06 0 25 50 75 100 125 150 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 INPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3638 G04 3638 G05 3638 G06
Peak Current Trip Threshold Peak Current Trip Threshold Peak Current Trip Threshold vs RISET vs Temperature and ISET vs Input Voltage
600 700 700 ISET OPEN 500 600 600 ISET OPEN 500 500 400 400 400 300 RISET = 100kΩ R 300 300 ISET = 100kΩ 200 PEAK CURRENT (mA) 200 PEAK CURRENT (mA) 200 100 100 ISET = GND 100 ISET = GND PEAK CURRENT TRIP THRESHOLD (mA) 0 0 0 0 25 50 75 100 125 150 175 200 –55 –25 5 35 65 95 125 155 0 30 60 90 120 150 RISET (kΩ) TEMPERATURE (°C) VIN VOLTAGE (V) 3638 G07 3638 G08 3638 G09 3638fa 4 For more information www.linear.com/LTC3638 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current, Efficiency vs Load Current, Efficiency vs Load Current, VOUT = 5V VOUT = 3.3V VOUT = 1.8V
100 100 100 FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 90 90 90 80 80 80 70 70 70 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 V 20 20 IN = 12V VIN = 12V VIN = 12V 10 VIN = 48V 10 VIN = 48V 10 VIN = 48V V V V 0 IN = 140V IN = 140V 0 IN = 140V 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3638 G01 3638 G02 3638 G03
Efficiency vs Input Voltage, Feedback Comparator Trip RUN and OVLO Thresholds vs VOUT = 5V Threshold vs Temperature Temperature
100 802 FIGURE 14 CIRCUIT 1.24 90 1.22 RISING 80 801 1.20 70 60 1.18 50 800 1.16 40 1.14 EFFICIENCY (%) 30 1.12 799 FALLING 20 THRESHOLD VOLTAGE (mV) 1.10 ILOAD = 250mA 10 ILOAD = 10mA 1.08 I RUN OR OVLO THRESHOLD VOLTAGE (V) LOAD = 1mA 0 798 1.06 0 25 50 75 100 125 150 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 INPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3638 G04 3638 G05 3638 G06
Peak Current Trip Threshold Peak Current Trip Threshold Peak Current Trip Threshold vs RISET vs Temperature and ISET vs Input Voltage
600 700 700 ISET OPEN 500 600 600 ISET OPEN 500 500 400 400 400 300 RISET = 100kΩ R 300 300 ISET = 100kΩ 200 PEAK CURRENT (mA) 200 PEAK CURRENT (mA) 200 100 100 ISET = GND 100 ISET = GND PEAK CURRENT TRIP THRESHOLD (mA) 0 0 0 0 25 50 75 100 125 150 175 200 –55 –25 5 35 65 95 125 155 0 30 60 90 120 150 RISET (kΩ) TEMPERATURE (°C) VIN VOLTAGE (V) 3638 G07 3638 G08 3638 G09 3638fa 4 For more information www.linear.com/LTC3638 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
