Datasheet LTC3701 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 2-Phase, Low Input Voltage, Dual Step-Down DC/DC Controller |
| Pages / Page | 20 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Undervoltage Lockout Trip. Maximum … |
| File Format / Size | PDF / 261 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Undervoltage Lockout Trip. Maximum Current Sense. Voltage (Falling) vs Temperature
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LTC3701
W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Lockout Trip Undervoltage Lockout Trip Maximum Current Sense Voltage (Falling) vs Temperature Voltage (Rising) vs Temperature Threshold vs Temperature
2.15 2.20 125 2.18 2.10 2.16 120 2.14 2.05 2.12 115 2.00 2.10 2.08 110 1.95 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 2.06 2.04 105 1.90 2.02 1.85 2.00 MAXIMUM CURRENT SENSE THRESHOLD (mV) 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3701 G04 3701 G05 3701 G06
Input and Shutdown Currents vs Efficiency vs Load Current (Pulse Input Voltage Skipping Mode)
600 100 FIGURE 1 CIRCUIT EXTCLK/MODE = GND PULSE SKIPPING MODE OPERATION VIN = 3.3V 500 V (EXTCLK/MODE = 0V) 90 OUT = 2.5V µA) V 400 80 IN = 8.4V BURST MODE OPERATION (EXTCLK/MODE = VIN) 300 70 VIN = 6V FIGURE 1 CIRCUIT 200 EFFICIENCY (%) 60 VIN = 4.2V INPUT CURRENT ( LOAD CURRENT = 0A 100 50 SHUTDOWN (ITH/RUN1,2 = 0V) 0 40 2 3 4 5 6 7 8 9 10 11 1 10 100 100O 1OOOO INPUT VOLTAGE (V) LOAD CURRENT (mA) 3701 G08 3701 G07
PGOOD RON vs Input Voltage 2-Phase Operation
500 IPGOOD = 500µA 450 SW1 5V/DIV 400 ) 350 Ω SW2 ( 300 5V/DIV DS(ON) 250 INPUT CURRENT 200 1A/DIV PGOOD R 150 FIGURE 1 CIRCUIT 100 500ns/DIV 50 0 0 1 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (V) 3701 G09 3701fa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Lockout Trip Undervoltage Lockout Trip Maximum Current Sense Voltage (Falling) vs Temperature Voltage (Rising) vs Temperature Threshold vs Temperature
2.15 2.20 125 2.18 2.10 2.16 120 2.14 2.05 2.12 115 2.00 2.10 2.08 110 1.95 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 2.06 2.04 105 1.90 2.02 1.85 2.00 MAXIMUM CURRENT SENSE THRESHOLD (mV) 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3701 G04 3701 G05 3701 G06
Input and Shutdown Currents vs Efficiency vs Load Current (Pulse Input Voltage Skipping Mode)
600 100 FIGURE 1 CIRCUIT EXTCLK/MODE = GND PULSE SKIPPING MODE OPERATION VIN = 3.3V 500 V (EXTCLK/MODE = 0V) 90 OUT = 2.5V µA) V 400 80 IN = 8.4V BURST MODE OPERATION (EXTCLK/MODE = VIN) 300 70 VIN = 6V FIGURE 1 CIRCUIT 200 EFFICIENCY (%) 60 VIN = 4.2V INPUT CURRENT ( LOAD CURRENT = 0A 100 50 SHUTDOWN (ITH/RUN1,2 = 0V) 0 40 2 3 4 5 6 7 8 9 10 11 1 10 100 100O 1OOOO INPUT VOLTAGE (V) LOAD CURRENT (mA) 3701 G08 3701 G07
PGOOD RON vs Input Voltage 2-Phase Operation
500 IPGOOD = 500µA 450 SW1 5V/DIV 400 ) 350 Ω SW2 ( 300 5V/DIV DS(ON) 250 INPUT CURRENT 200 1A/DIV PGOOD R 150 FIGURE 1 CIRCUIT 100 500ns/DIV 50 0 0 1 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (V) 3701 G09 3701fa 4
