Datasheet LTC3408 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor |
| Pages / Page | 12 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1). Frequency vs V. … |
| File Format / Size | PDF / 165 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1). Frequency vs V. Output Voltage vs Load Current. OUT
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LTC3408
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1) Frequency vs V Output Voltage vs Load Current OUT RDS(ON) vs Input Voltage
1600 1.844 0.7 TA = 25°C TA = 25°C TA = 25°C VIN = 3.6V VIN = 3.6V 1400 1.834 0.6 MAIN 1.824 0.5 SWITCH 1200 ) 1.814 Ω ( 0.4 1000 SYNCHRONOUS 1.804 DS(ON) 0.3 R SWITCH FREQUENCY (kHz) 800 OUTPUT VOLTAGE (V) 1.794 0.2 BYPASS 600 1.784 0.1 SWITCH 400 1.774 0 0 0.2 0.4 0.6 0.8 1.0 1.2 0 100 200 300 400 500 600 700 800 900 1000 0 1 2 3 4 5 6 7 VOUT (V) LOAD CURRENT (mA) INPUT VOTLAGE (V) 3408 G08 3408 G09 3408 G10
Dynamic Supply Current RDS(ON) vs Temperature vs Supply Voltage Switch Leakage vs Temperature
0.7 4500 300 V T V IN = 2.7V A = 25°C IN = 5.5V V 0.6 4000 OUT = 1.8V RUN = 0V V I IN = 3.6V µA) LOAD = 0A 250 V 3500 IN = 4.2V 0.5 MAIN FORCED CONTINUOUS ) SWITCH 3000 MODE 200 Ω ( 0.4 2500 150 DS(ON) 0.3 2000 R SYNCHRONOUS SWITCH 1500 100 0.2 SWITCH LEAKAGE (nA) BYPASS V 1000 MAIN SWITCH IN = 3V 0.1 SWITCH DYNAMIC SUPPLY CURRENT ( 50 500 SYNCHRONOUS SWITCH VIN = 4.2V 0 0 0 –50 –25 0 25 50 75 100 125 2 3 4 5 6 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) SUPPLY VOLTAGE (V) TEMPERATURE (°C) 3408 G11 3408 G12 3408 G13
Switch Leakage vs Input Voltage Start-Up from Shutdown
120 TA = 25°C RUN RUN = 0V 100 2V/DIV SYNCHRONOUS V SWITCH OUT 80 1V/DIV 60 MAIN IL SWITCH 500mA/DIV 40 SWITCH LEAKAGE (pA) 20 V 3408 G15 IN = 3.6V 40µs/DIV VREF = 0.6V RLOAD = 3Ω 0 0 1 2 3 4 5 6 INPUT VOLTAGE (V) 3408 G14 3408f 4
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1) Frequency vs V Output Voltage vs Load Current OUT RDS(ON) vs Input Voltage
1600 1.844 0.7 TA = 25°C TA = 25°C TA = 25°C VIN = 3.6V VIN = 3.6V 1400 1.834 0.6 MAIN 1.824 0.5 SWITCH 1200 ) 1.814 Ω ( 0.4 1000 SYNCHRONOUS 1.804 DS(ON) 0.3 R SWITCH FREQUENCY (kHz) 800 OUTPUT VOLTAGE (V) 1.794 0.2 BYPASS 600 1.784 0.1 SWITCH 400 1.774 0 0 0.2 0.4 0.6 0.8 1.0 1.2 0 100 200 300 400 500 600 700 800 900 1000 0 1 2 3 4 5 6 7 VOUT (V) LOAD CURRENT (mA) INPUT VOTLAGE (V) 3408 G08 3408 G09 3408 G10
Dynamic Supply Current RDS(ON) vs Temperature vs Supply Voltage Switch Leakage vs Temperature
0.7 4500 300 V T V IN = 2.7V A = 25°C IN = 5.5V V 0.6 4000 OUT = 1.8V RUN = 0V V I IN = 3.6V µA) LOAD = 0A 250 V 3500 IN = 4.2V 0.5 MAIN FORCED CONTINUOUS ) SWITCH 3000 MODE 200 Ω ( 0.4 2500 150 DS(ON) 0.3 2000 R SYNCHRONOUS SWITCH 1500 100 0.2 SWITCH LEAKAGE (nA) BYPASS V 1000 MAIN SWITCH IN = 3V 0.1 SWITCH DYNAMIC SUPPLY CURRENT ( 50 500 SYNCHRONOUS SWITCH VIN = 4.2V 0 0 0 –50 –25 0 25 50 75 100 125 2 3 4 5 6 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) SUPPLY VOLTAGE (V) TEMPERATURE (°C) 3408 G11 3408 G12 3408 G13
Switch Leakage vs Input Voltage Start-Up from Shutdown
120 TA = 25°C RUN RUN = 0V 100 2V/DIV SYNCHRONOUS V SWITCH OUT 80 1V/DIV 60 MAIN IL SWITCH 500mA/DIV 40 SWITCH LEAKAGE (pA) 20 V 3408 G15 IN = 3.6V 40µs/DIV VREF = 0.6V RLOAD = 3Ω 0 0 1 2 3 4 5 6 INPUT VOLTAGE (V) 3408 G14 3408f 4
