Datasheet LT3493 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN |
| 页数 / 页 | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 607 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Typical Minimum Input Voltage. SHDN Pin Current
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LT3493
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Typical Minimum Input Voltage Typical Minimum Input Voltage SHDN Pin Current (VOUT = 5V) (VOUT = 3.3V)
50 7.5 5.5 45 TO START 5.3 40 7.0 5.1 35 4.9 TO START 30 6.5 4.7 (μA) 25 (V) (V) 4.5 IN IN V V I SHDN 20 6.0 4.3 TO RUN 15 4.1 TO RUN 10 5.5 3.9 5 3.7 0 5.0 3.5 0 2 4 6 8 10 12 14 16 18 20 1 10 100 1000 1 10 100 1000 VSHDN (V) I I OUT (mA) OUT (mA) 3493 G14 3493 G15 3493 G16
Switch Current Limit Switch Current Limit
2.0 2.0 1.9 1.8 1.8 1.6 1.7 1.4 1.6 1.2 1.5 1.0 1.4 0.8 1.3 0.6 SWITCH CURRENT LIMIT (A) 1.2 SWITCH CURRENT LIMIT (A) 0.4 1.1 0.2 1.0 0 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 TEMPERATURE (°C) DUTY CYCLE (%) 3493 G17 3493 G18
Operating Waveforms, Operating Waveforms Discontinuous Mode
VSW VSW 5V/DIV 5V/DIV IL I 0.5A/DIV L 0.5A/DIV 0 0 V V OUT OUT 20mV/DIV 20mV/DIV VIN = 12V 1μs/DIV 3493 G19 1μs/DIV 3493 G20 VIN = 12V VOUT = 3.3V VOUT = 3.3V IOUT = 0.5A IOUT = 50mA L = 10μH L = 10μH COUT = 10μF COUT = 10μF 3493fb 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Typical Minimum Input Voltage Typical Minimum Input Voltage SHDN Pin Current (VOUT = 5V) (VOUT = 3.3V)
50 7.5 5.5 45 TO START 5.3 40 7.0 5.1 35 4.9 TO START 30 6.5 4.7 (μA) 25 (V) (V) 4.5 IN IN V V I SHDN 20 6.0 4.3 TO RUN 15 4.1 TO RUN 10 5.5 3.9 5 3.7 0 5.0 3.5 0 2 4 6 8 10 12 14 16 18 20 1 10 100 1000 1 10 100 1000 VSHDN (V) I I OUT (mA) OUT (mA) 3493 G14 3493 G15 3493 G16
Switch Current Limit Switch Current Limit
2.0 2.0 1.9 1.8 1.8 1.6 1.7 1.4 1.6 1.2 1.5 1.0 1.4 0.8 1.3 0.6 SWITCH CURRENT LIMIT (A) 1.2 SWITCH CURRENT LIMIT (A) 0.4 1.1 0.2 1.0 0 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 TEMPERATURE (°C) DUTY CYCLE (%) 3493 G17 3493 G18
Operating Waveforms, Operating Waveforms Discontinuous Mode
VSW VSW 5V/DIV 5V/DIV IL I 0.5A/DIV L 0.5A/DIV 0 0 V V OUT OUT 20mV/DIV 20mV/DIV VIN = 12V 1μs/DIV 3493 G19 1μs/DIV 3493 G20 VIN = 12V VOUT = 3.3V VOUT = 3.3V IOUT = 0.5A IOUT = 50mA L = 10μH L = 10μH COUT = 10μF COUT = 10μF 3493fb 5