Datasheet LTC3890 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller |
| 页数 / 页 | 40 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Total Input Supply Current. EXTVCC … |
| 修订版 | D |
| 文件格式/大小 | PDF / 805 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Total Input Supply Current. EXTVCC Switchover and INTVCC. vs Input Voltage
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LTC3890
TYPICAL PERFORMANCE CHARACTERISTICS Total Input Supply Current EXTVCC Switchover and INTVCC vs Input Voltage Voltages vs Temperature INTVCC Line Regulation
300 6.0 5.5 VOUT = 3.3V FIGURE 13 CIRCUIT 5.8 250 5.6 5.0 5.4 200 300µA LOAD VOLTAGE (V) 5.2 INTVCC 4.5 CC TAGE (V) 150 5.0 EXTV VOL Y CURRENT (µA) CC RISING 4.8 4.0 100 V CC AND INTV 4.6 EXTVCC FALLING SUPPL INT NO LOAD CC 4.4 50 3.5 EXTV 4.2 I 0 4.0 LOAD = 10mA 3.0 5 10 15 20 25 30 35 40 45 50 55 60 65 –75 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 50 55 60 65 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3890 G10 3890 G11 3890 G12
Maximum Current Sense Voltage Maximum Current Sense vs ITH Voltage SENSE– Pin Input Bias Current Threshold vs Duty Cycle
80 800 80 5% DUTY CYCLE 700 60 70 ILIM = FLOAT 600 PULSE-SKIPPING MODE TAGE (mV) 40 500 60 Burst Mode OPERATION 400 I 20 50 LIM = INTVCC 300 – CURRENT (µA) ILIM = GND 0 200 40 ILIM = INTVCC SENSE 100 ILIM = GND I CURRENT SENSE THESHOLD (mV) –20 LIM = FLOAT 30 0 FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL –40 –100 20 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 5 10 15 20 25 0 10 20 30 40 50 60 70 80 90 100 VITH (V) V DUTY CYCLE (%) SENSE COMMON MODE VOLTAGE (V) 3890 G13 3890 G15 3890 G14
Foldback Current Limit Quiescent Current vs Temperature INTVCC vs Load Current
80 80 5.50 I V V LIM = FLOAT IN = 12V IN = 12V 70 75 5.25 70 TAGE (mV) 60 EXTVCC = 0V I 65 LIM = INTVCC 5.00 50 EXTVCC = 8.5V 60 40 55 4.75 VOLTAGE (V) 30 50 CC I 4.50 EXTVCC = 5V LIM = GND 45 INTV 20 QUIESCENT CURRENT (µA) 40 10 4.25 35 MAXIMUM CURRENT SENSE VOL 0 30 4.00 0 100 200 300 400 500 600 700 800 –75 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 FEEDBACK VOLTAGE (MV) TEMPERATURE (°C) LOAD CURRENT (mA) 3890 G16 3890 G17 3890 G18 Rev. D 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Total Input Supply Current EXTVCC Switchover and INTVCC vs Input Voltage Voltages vs Temperature INTVCC Line Regulation
300 6.0 5.5 VOUT = 3.3V FIGURE 13 CIRCUIT 5.8 250 5.6 5.0 5.4 200 300µA LOAD VOLTAGE (V) 5.2 INTVCC 4.5 CC TAGE (V) 150 5.0 EXTV VOL Y CURRENT (µA) CC RISING 4.8 4.0 100 V CC AND INTV 4.6 EXTVCC FALLING SUPPL INT NO LOAD CC 4.4 50 3.5 EXTV 4.2 I 0 4.0 LOAD = 10mA 3.0 5 10 15 20 25 30 35 40 45 50 55 60 65 –75 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 50 55 60 65 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3890 G10 3890 G11 3890 G12
Maximum Current Sense Voltage Maximum Current Sense vs ITH Voltage SENSE– Pin Input Bias Current Threshold vs Duty Cycle
80 800 80 5% DUTY CYCLE 700 60 70 ILIM = FLOAT 600 PULSE-SKIPPING MODE TAGE (mV) 40 500 60 Burst Mode OPERATION 400 I 20 50 LIM = INTVCC 300 – CURRENT (µA) ILIM = GND 0 200 40 ILIM = INTVCC SENSE 100 ILIM = GND I CURRENT SENSE THESHOLD (mV) –20 LIM = FLOAT 30 0 FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL –40 –100 20 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 5 10 15 20 25 0 10 20 30 40 50 60 70 80 90 100 VITH (V) V DUTY CYCLE (%) SENSE COMMON MODE VOLTAGE (V) 3890 G13 3890 G15 3890 G14
Foldback Current Limit Quiescent Current vs Temperature INTVCC vs Load Current
80 80 5.50 I V V LIM = FLOAT IN = 12V IN = 12V 70 75 5.25 70 TAGE (mV) 60 EXTVCC = 0V I 65 LIM = INTVCC 5.00 50 EXTVCC = 8.5V 60 40 55 4.75 VOLTAGE (V) 30 50 CC I 4.50 EXTVCC = 5V LIM = GND 45 INTV 20 QUIESCENT CURRENT (µA) 40 10 4.25 35 MAXIMUM CURRENT SENSE VOL 0 30 4.00 0 100 200 300 400 500 600 700 800 –75 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 FEEDBACK VOLTAGE (MV) TEMPERATURE (°C) LOAD CURRENT (mA) 3890 G16 3890 G17 3890 G18 Rev. D 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts