Datasheet LTC1879 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 1.2A Synchronous Step-Down Regulator with 15µA Quiescent Current |
| Pages / Page | 20 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Switch Leakage vs Temperature. … |
| File Format / Size | PDF / 268 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Switch Leakage vs Temperature. Switch Leakage vs Input Voltage
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LTC1879
W U TYPICAL PERFOR A CE CHARACTERISTICS Switch Leakage vs Temperature Switch Leakage vs Input Voltage Output Voltage vs Load Current
20 50 2.51 VIN = 10V RUN = 0V 18 45 T 2.50 A = 25°C 16 40 2.49 µA) 14 35 2.48 12 30 2.47 MAIN SWITCH 10 25 2.46 MAIN SWITCH 8 20 2.45 6 2.44 SWITCH LEAKAGE ( SWITCH LEAKAGE (nA) 15 OUTPUT VOLTAGE (V) SYNCHRONOUS 4 2.43 SWITCH 10 PULSE SKIPPING MODE 2 V 5 2.42 IN = 5V SYNCHRONOUS SWITCH L = 6.2µH 0 0 2.41 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 0 200 400 600 800 1000 1200 1400 1600 TEMPERATURE (°C) INPUT VOLTAGE (V) LOAD CURRENT (mA) 1879 G07 1879 G08 1879 G09
Reference Voltage vs Temperature Efficiency vs Output Current Efficiency vs Output Current
804 100 100 VIN = 6V 803 V 90 IN = 3.6V V 90 802 IN = 3.6V 801 80 80 VIN = 5V 800 V 70 IN = 5V 70 799 V V IN = 7.2V IN = 7.2V 60 60 798 EFFICIENCY (%) V EFFICIENCY (%) VIN = 10V 797 IN = 10V 50 50 REFERENCE VOLTAGE (mV) 796 V V 40 OUT = 1.8V 40 OUT = 2.5V 795 L = 6.2µH L = 6.2µH Burst Mode OPERATION Burst Mode OPERATION 794 30 30 –50 –25 0 25 50 75 100 125 0.1 1 10 100 1000 0.1 1 10 100 1000 TEMPERATURE (°C) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 1879 G11 1879 G12 1879 G10
Efficiency vs Output Current Efficiency vs Input Voltage
100 100 VIN = 4.2V V 90 IN = 7.2V 100mA 10mA 90 80 1mA 70 80 VIN = 4.2V 60 V 70 50 IN = 7.2V 40 60 0.1mA EFFICIENCY (%) EFFICIENCY (%) 30 50 V 20 OUT = 3.1V L = 6.2µH V 40 OUT = 2.5V 10 Burst Mode OPERATION L = 6.2µH PULSE SKIPPING MODE Burst Mode OPERATION 0 30 0.1 1 10 100 1000 2 4 6 8 10 OUTPUT CURRENT (mA) INPUT VOLTAGE (V) 1879 G13 1879 G14 1879f 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Switch Leakage vs Temperature Switch Leakage vs Input Voltage Output Voltage vs Load Current
20 50 2.51 VIN = 10V RUN = 0V 18 45 T 2.50 A = 25°C 16 40 2.49 µA) 14 35 2.48 12 30 2.47 MAIN SWITCH 10 25 2.46 MAIN SWITCH 8 20 2.45 6 2.44 SWITCH LEAKAGE ( SWITCH LEAKAGE (nA) 15 OUTPUT VOLTAGE (V) SYNCHRONOUS 4 2.43 SWITCH 10 PULSE SKIPPING MODE 2 V 5 2.42 IN = 5V SYNCHRONOUS SWITCH L = 6.2µH 0 0 2.41 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 0 200 400 600 800 1000 1200 1400 1600 TEMPERATURE (°C) INPUT VOLTAGE (V) LOAD CURRENT (mA) 1879 G07 1879 G08 1879 G09
Reference Voltage vs Temperature Efficiency vs Output Current Efficiency vs Output Current
804 100 100 VIN = 6V 803 V 90 IN = 3.6V V 90 802 IN = 3.6V 801 80 80 VIN = 5V 800 V 70 IN = 5V 70 799 V V IN = 7.2V IN = 7.2V 60 60 798 EFFICIENCY (%) V EFFICIENCY (%) VIN = 10V 797 IN = 10V 50 50 REFERENCE VOLTAGE (mV) 796 V V 40 OUT = 1.8V 40 OUT = 2.5V 795 L = 6.2µH L = 6.2µH Burst Mode OPERATION Burst Mode OPERATION 794 30 30 –50 –25 0 25 50 75 100 125 0.1 1 10 100 1000 0.1 1 10 100 1000 TEMPERATURE (°C) OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) 1879 G11 1879 G12 1879 G10
Efficiency vs Output Current Efficiency vs Input Voltage
100 100 VIN = 4.2V V 90 IN = 7.2V 100mA 10mA 90 80 1mA 70 80 VIN = 4.2V 60 V 70 50 IN = 7.2V 40 60 0.1mA EFFICIENCY (%) EFFICIENCY (%) 30 50 V 20 OUT = 3.1V L = 6.2µH V 40 OUT = 2.5V 10 Burst Mode OPERATION L = 6.2µH PULSE SKIPPING MODE Burst Mode OPERATION 0 30 0.1 1 10 100 1000 2 4 6 8 10 OUTPUT CURRENT (mA) INPUT VOLTAGE (V) 1879 G13 1879 G14 1879f 4
