Datasheet LTC7138 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Efficiency, 140V 400mA Step-Down Regulator |
| Pages / Page | 24 / 4 — Typical perForMance characTerisTics. Efficiency vs Load Current,. VOUT = … |
| File Format / Size | PDF / 484 Kb |
| Document Language | English |
Typical perForMance characTerisTics. Efficiency vs Load Current,. VOUT = 5V. VOUT = 3.3V. VOUT = 1.8V
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LTC7138
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 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 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) 7138 G01 7138 G02 7138 G03
Efficiency vs Input Voltage, Feedback Comparator Trip RUN and OVLO Thresholds vs VOUT = 5V Threshold vs Temperature Temperature
100 802 FIGURE 13 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 = 1mA 10 ILOAD = 30mA 1.08 I RUN OR OVLO THRESHOLD VOLTAGE (V) LOAD = 400mA 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) 7138 G04 7138 G05 7138 G06
Peak Current and Valley Current Peak Current and Valley Current Trip Thresholds Trip Thresholds vs Temperature Peak Current and Valley Current vs RISET and ISET Trip Thresholds vs Input Voltage
700 700 700 PEAK CURRENT ISET OPEN PEAK CURRENT ISET Open 600 PEAK CURRENT 600 600 500 500 500 400 400 VALLEY CURRENT ISET OPEN 400 VALLEY CURRENT ISET Open 300 300 300 THRESHOLD (mA) THRESHOLD (mA) THRESHOLD (mA) 200 VALLEY CURRENT 200 PEAK CURRENT ISET GND 200 PEAK CURRENT ISET GND VALLEY CURRENT I VALLEY CURRENT ISET GND 100 100 SET GND 100 0 0 0 0 25 50 75 100 125 150 175 200 225 –55 –25 5 35 65 95 125 155 0 30 60 90 120 150 RISET (kΩ) TEMPERATURE (°C) VIN VOLTAGE (V) 7138 G07 7138 G08 7138 G09 7138f 4 For more information www.linear.com/LTC7138 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 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 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) 7138 G01 7138 G02 7138 G03
Efficiency vs Input Voltage, Feedback Comparator Trip RUN and OVLO Thresholds vs VOUT = 5V Threshold vs Temperature Temperature
100 802 FIGURE 13 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 = 1mA 10 ILOAD = 30mA 1.08 I RUN OR OVLO THRESHOLD VOLTAGE (V) LOAD = 400mA 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) 7138 G04 7138 G05 7138 G06
Peak Current and Valley Current Peak Current and Valley Current Trip Thresholds Trip Thresholds vs Temperature Peak Current and Valley Current vs RISET and ISET Trip Thresholds vs Input Voltage
700 700 700 PEAK CURRENT ISET OPEN PEAK CURRENT ISET Open 600 PEAK CURRENT 600 600 500 500 500 400 400 VALLEY CURRENT ISET OPEN 400 VALLEY CURRENT ISET Open 300 300 300 THRESHOLD (mA) THRESHOLD (mA) THRESHOLD (mA) 200 VALLEY CURRENT 200 PEAK CURRENT ISET GND 200 PEAK CURRENT ISET GND VALLEY CURRENT I VALLEY CURRENT ISET GND 100 100 SET GND 100 0 0 0 0 25 50 75 100 125 150 175 200 225 –55 –25 5 35 65 95 125 155 0 30 60 90 120 150 RISET (kΩ) TEMPERATURE (°C) VIN VOLTAGE (V) 7138 G07 7138 G08 7138 G09 7138f 4 For more information www.linear.com/LTC7138 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
