Datasheet LTC7138 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | High Efficiency, 140V 400mA Step-Down Regulator |
| Pages / Page | 24 / 5 — Typical perForMance characTerisTics. Quiescent Supply Current. Switch Pin … |
| File Format / Size | PDF / 484 Kb |
| Document Language | English |
Typical perForMance characTerisTics. Quiescent Supply Current. Switch Pin Current. vs Input Voltage. vs Temperature
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LTC7138
Typical perForMance characTerisTics Quiescent Supply Current Quiescent Supply Current Switch Pin Current vs Input Voltage vs Temperature vs Temperature
15 35 15 VIN = 140V VIN = 140V SLEEP MODE SLEEP 30 10 SW = 0.8V 25 CURRENT INTO SW 10 5 20 SLEEP 0 15 SW = 0V CURRENT OUT OF SW 5 –5 SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 10 V IN V IN SWITCH PIN CURRENT (µA) SHUTDOWN 5 –10 SHUTDOWN 0 0 –15 0 30 60 90 120 150 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 VIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 7138 G10 7138 G12 7138 G11
Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature Load Step Transient Response
3.0 4 ISW = 250mA OUTPUT VOLTAGE 100mV/DIV 2.5 3 LOAD CURRENT 2.0 2 200mA/DIV V 7138 G15 IN = 48V 200µs/DIV 1.5 1 VOUT = 3.3V SWITCH ON-RESISTANCE (Ω) SWITCH ON-RESISTANCE (Ω) 10mA TO 400mA LOAD STEP FIGURE 14 CIRCUIT 1.0 0 30 60 90 120 150 0–55 –25 5 35 65 95 125 155 VIN VOLTAGE (V) TEMPERATURE (°C) 7138 G13 7138 G14
Operating Waveforms, VIN = 48V Operating Waveforms, VIN = 140V Short-Circuit and Recovery
OUTPUT OUTPUT VOLTAGE VOLTAGE 100mV/DIV 100mV/DIV OUTPUT VOLTAGE SWITCH SWITCH 1V/DIV VOLTAGE VOLTAGE 20V/DIV 50V/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 500mA/DIV 500mA/DIV 500mA/DIV V 7138 G16 7138 G17 7138 G18 IN = 48V 10µs/DIV VIN = 140V 10µs/DIV 500µs/DIV VOUT = 3.3V VOUT = 3.3V FIGURE 14 CIRCUIT IOUT = 300mA IOUT = 300mA FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 7138f For more information www.linear.com/LTC7138 5 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 Quiescent Supply Current Quiescent Supply Current Switch Pin Current vs Input Voltage vs Temperature vs Temperature
15 35 15 VIN = 140V VIN = 140V SLEEP MODE SLEEP 30 10 SW = 0.8V 25 CURRENT INTO SW 10 5 20 SLEEP 0 15 SW = 0V CURRENT OUT OF SW 5 –5 SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 10 V IN V IN SWITCH PIN CURRENT (µA) SHUTDOWN 5 –10 SHUTDOWN 0 0 –15 0 30 60 90 120 150 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 VIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 7138 G10 7138 G12 7138 G11
Switch On-Resistance Switch On-Resistance vs Input Voltage vs Temperature Load Step Transient Response
3.0 4 ISW = 250mA OUTPUT VOLTAGE 100mV/DIV 2.5 3 LOAD CURRENT 2.0 2 200mA/DIV V 7138 G15 IN = 48V 200µs/DIV 1.5 1 VOUT = 3.3V SWITCH ON-RESISTANCE (Ω) SWITCH ON-RESISTANCE (Ω) 10mA TO 400mA LOAD STEP FIGURE 14 CIRCUIT 1.0 0 30 60 90 120 150 0–55 –25 5 35 65 95 125 155 VIN VOLTAGE (V) TEMPERATURE (°C) 7138 G13 7138 G14
Operating Waveforms, VIN = 48V Operating Waveforms, VIN = 140V Short-Circuit and Recovery
OUTPUT OUTPUT VOLTAGE VOLTAGE 100mV/DIV 100mV/DIV OUTPUT VOLTAGE SWITCH SWITCH 1V/DIV VOLTAGE VOLTAGE 20V/DIV 50V/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 500mA/DIV 500mA/DIV 500mA/DIV V 7138 G16 7138 G17 7138 G18 IN = 48V 10µs/DIV VIN = 140V 10µs/DIV 500µs/DIV VOUT = 3.3V VOUT = 3.3V FIGURE 14 CIRCUIT IOUT = 300mA IOUT = 300mA FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 7138f For more information www.linear.com/LTC7138 5 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
