Datasheet LT3493-3 (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 PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise noted. … |
| 文件格式/大小 | PDF / 391 Kb |
| 文件语言 | 英语 |
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise noted. SHDN Pin Current. Switch Current Limit
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LT3493-3
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. SHDN Pin Current Switch Current Limit Switch Current Limit
50 2.0 2.0 45 1.9 1.8 40 1.8 1.6 35 1.7 1.4 1.6 µA) 30 1.2 ( 25 1.5 1.0 I SHDN 20 1.4 0.8 15 1.3 0.6 10 SWITCH CURRENT LIMIT (A) 1.2 SWITCH CURRENT LIMIT (A) 0.4 5 1.1 0.2 0 1.0 0 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 0 20 40 60 80 100 VSHDN (V) TEMPERATURE (°C) DUTY CYCLE (%) 3493-3 G14 3493-3 G17 3493-3 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 3493-3 G19 1µs/DIV 3493-3 G20 VIN = 12V VOUT = 3.3V VOUT = 3.3V IOUT = 0.5A IOUT = 50mA L = 10µH L = 10µH COUT = 10µF COUT = 10µF 3493-3f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. SHDN Pin Current Switch Current Limit Switch Current Limit
50 2.0 2.0 45 1.9 1.8 40 1.8 1.6 35 1.7 1.4 1.6 µA) 30 1.2 ( 25 1.5 1.0 I SHDN 20 1.4 0.8 15 1.3 0.6 10 SWITCH CURRENT LIMIT (A) 1.2 SWITCH CURRENT LIMIT (A) 0.4 5 1.1 0.2 0 1.0 0 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 0 20 40 60 80 100 VSHDN (V) TEMPERATURE (°C) DUTY CYCLE (%) 3493-3 G14 3493-3 G17 3493-3 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 3493-3 G19 1µs/DIV 3493-3 G20 VIN = 12V VOUT = 3.3V VOUT = 3.3V IOUT = 0.5A IOUT = 50mA L = 10µH L = 10µH COUT = 10µF COUT = 10µF 3493-3f 5