Datasheet LTC3850-2 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Dual, 2-Phase Synchronous Step-Down Switching Controller |
| 页数 / 页 | 36 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Tracking Up and Down. Quiescent … |
| 文件格式/大小 | PDF / 417 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Tracking Up and Down. Quiescent Current. with External Ramp
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LTC3850-2
TYPICAL PERFORMANCE CHARACTERISTICS Tracking Up and Down Quiescent Current with External Ramp vs Input Voltage without EXTVCC INTVCC Line Regulation
5 5.25 TK/SS1 5.00 TK/SS2 4 2V/DIV 4.75 VOUT1 3.3V 3 3Ω LOAD TAGE (V) 4.50 1V/DIV VOL 4.25 V Y CURRENT (mA) 2 CC OUT2 V 1.8V INT 1.5Ω LOAD SUPPL 4.00 1V/DIV 38502 G10 1 10ms/DIV 3.75 0 3.50 5 10 15 20 25 0 5 10 15 20 25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 38502 G11 38502 G12
Current Sense Threshold Maximum Current Sense Threshold Maximum Current Sense vs ITH Voltage vs Common Mode Voltage Threshold vs Duty Cycle
80 80 100 70 90 60 80 60 70 40 50 60 (mV) 20 40 50 SENSEV 30 40 0 30 20 –20 20 CURRENT SENSE THRESHOLD (mV) 10 CURRENT SENSE THRESHOLD (mV) 10 –40 0 0 0 0.5 1 1.5 2 0 1 2 3 4 5 0 20 40 60 80 100 VITH (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38502 G13 38502 G14 38502 G15
Maximum Current Sense Voltage vs TK/SS Pull-Up Current Feedback Voltage (Current Foldback) vs Temperature
80 2.00 70 60 1.75 50 40 1.50 30 TK/SS CURRENT (μA) 20 1.25 10 MAXIMUM CURRENT SENSE VOLTAGE (mV) 0 1.00 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –50 –25 0 25 50 75 100 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) 38502 G16 38502 G17 38502f 6
TYPICAL PERFORMANCE CHARACTERISTICS Tracking Up and Down Quiescent Current with External Ramp vs Input Voltage without EXTVCC INTVCC Line Regulation
5 5.25 TK/SS1 5.00 TK/SS2 4 2V/DIV 4.75 VOUT1 3.3V 3 3Ω LOAD TAGE (V) 4.50 1V/DIV VOL 4.25 V Y CURRENT (mA) 2 CC OUT2 V 1.8V INT 1.5Ω LOAD SUPPL 4.00 1V/DIV 38502 G10 1 10ms/DIV 3.75 0 3.50 5 10 15 20 25 0 5 10 15 20 25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 38502 G11 38502 G12
Current Sense Threshold Maximum Current Sense Threshold Maximum Current Sense vs ITH Voltage vs Common Mode Voltage Threshold vs Duty Cycle
80 80 100 70 90 60 80 60 70 40 50 60 (mV) 20 40 50 SENSEV 30 40 0 30 20 –20 20 CURRENT SENSE THRESHOLD (mV) 10 CURRENT SENSE THRESHOLD (mV) 10 –40 0 0 0 0.5 1 1.5 2 0 1 2 3 4 5 0 20 40 60 80 100 VITH (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38502 G13 38502 G14 38502 G15
Maximum Current Sense Voltage vs TK/SS Pull-Up Current Feedback Voltage (Current Foldback) vs Temperature
80 2.00 70 60 1.75 50 40 1.50 30 TK/SS CURRENT (μA) 20 1.25 10 MAXIMUM CURRENT SENSE VOLTAGE (mV) 0 1.00 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 –50 –25 0 25 50 75 100 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) 38502 G16 38502 G17 38502f 6