Datasheet LTC3772B (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller |
| 页数 / 页 | 20 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Quiescent Current (Shutdown). … |
| 文件格式/大小 | PDF / 331 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS. Quiescent Current (Shutdown). Shutdown Threshold. Regulated Feedback Voltage
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LTC3772B
W U TYPICAL PERFOR A CE CHARACTERISTICS Quiescent Current (Shutdown) Shutdown Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
14 800 812 VIN = 4.2V VIN = 4.2V 12 808 µA) 700 10 804 8 600 (mV) 800 6 /RUN (mV) FBV ITHV 4 796 QUIESCENT CURRENT ( 500 2 792 0 400 788 –60 –40 –20 0 20 40 60 80 100 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 80 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3772B G04 3772B G05 3772B G06
Regulated Feedback Voltage Oscillator Frequency Oscillator Frequency vs Input Voltage vs Temperature vs Input Voltage
0.812 600 560 VIN = 4.2V TA = 25°C 590 0.808 580 555 570 0.804 560 0.800 (kHz) 550 (kHz) 550 f OSC 540 f OSC 0.796 530 FEEDBACK VOLTAGE (V) 545 520 0.792 510 0.788 500 540 2 3 4 5 6 7 8 9 10 –50 –30 –10 10 30 50 70 90 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (V) TEMPERATURE (°C) VIN (V) 3772B G07 3772B G08 3772B G09
ITH/RUN Start-Up Current ITH/RUN Start-Up Current Undervoltage Lockout Thresholds vs Temperature vs Input Voltage vs Temperature
1.5 2.1 2.5 ITH/RUN = 0V ITH/RUN = 0V 1.4 2.4 1.9 µA) 1.3 µA) 2.3 1.7 1.2 2.2 1.1 1.5 2.1 RISING 1.0 1.3 2.0 0.9 1.1 1.9 FALLING 0.8 INPUT VOLTAGE (V) 1.8 /RUN PULL-UP CURRENT ( 0.9 0.7 /RUN PULL-UP CURRENT ( 1.7 I TH I TH 0.6 0.7 1.6 0.5 0.5 1.5 –60 –40 –20 0 20 40 60 80 100 2 4 6 8 10 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3772B FG10 3772B G11 3772B G12 3772bfa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Quiescent Current (Shutdown) Shutdown Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
14 800 812 VIN = 4.2V VIN = 4.2V 12 808 µA) 700 10 804 8 600 (mV) 800 6 /RUN (mV) FBV ITHV 4 796 QUIESCENT CURRENT ( 500 2 792 0 400 788 –60 –40 –20 0 20 40 60 80 100 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 80 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3772B G04 3772B G05 3772B G06
Regulated Feedback Voltage Oscillator Frequency Oscillator Frequency vs Input Voltage vs Temperature vs Input Voltage
0.812 600 560 VIN = 4.2V TA = 25°C 590 0.808 580 555 570 0.804 560 0.800 (kHz) 550 (kHz) 550 f OSC 540 f OSC 0.796 530 FEEDBACK VOLTAGE (V) 545 520 0.792 510 0.788 500 540 2 3 4 5 6 7 8 9 10 –50 –30 –10 10 30 50 70 90 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (V) TEMPERATURE (°C) VIN (V) 3772B G07 3772B G08 3772B G09
ITH/RUN Start-Up Current ITH/RUN Start-Up Current Undervoltage Lockout Thresholds vs Temperature vs Input Voltage vs Temperature
1.5 2.1 2.5 ITH/RUN = 0V ITH/RUN = 0V 1.4 2.4 1.9 µA) 1.3 µA) 2.3 1.7 1.2 2.2 1.1 1.5 2.1 RISING 1.0 1.3 2.0 0.9 1.1 1.9 FALLING 0.8 INPUT VOLTAGE (V) 1.8 /RUN PULL-UP CURRENT ( 0.9 0.7 /RUN PULL-UP CURRENT ( 1.7 I TH I TH 0.6 0.7 1.6 0.5 0.5 1.5 –60 –40 –20 0 20 40 60 80 100 2 4 6 8 10 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3772B FG10 3772B G11 3772B G12 3772bfa 4