Datasheet LTC3890-3 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller |
| Pages / Page | 40 / 6 — Typical perForMance characTerisTics. Total Input Supply Current. EXTVCC … |
| File Format / Size | PDF / 1.3 Mb |
| Document Language | English |
Typical perForMance characTerisTics. Total Input Supply Current. EXTVCC Switchover and INTVCC. vs Input Voltage
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LTC3890-3
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 EXTVCC RISING VOL Y CURRENT (µA) 4.8 V CC 4.0 100 AND INTV 4.6 EXTV SUPPL CC FALLING INT NO LOAD CC 4.4 3.5 50 EXTV 4.2 ILOAD = 10mA 0 4.0 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) 38903 G10 38903 G12 38903 G11
Maximum Current Sense Voltage Maximum Current Sense vs ITH Voltage SENSE– Pin Input Bias Current Threshold vs Duty Cycle
80 800 90 5% DUTY CYCLE 700 60 85 600 PULSE-SKIPPING MODE TAGE (mV) 40 500 Burst Mode 80 OPERATION 400 20 75 300 – CURRENT (µA) 0 200 70 SENSE 100 CURRENT SENSE THESHOLD (mV) –20 65 0 FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL –40 –100 60 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) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38903 G13 38903 G14 38903 G15
Current Limit vs Feedback Voltage Quiescent Current vs Temperature INTVCC vs Load Current
80 80 5.50 VIN = 12V VIN = 12V 75 70 5.25 70 EXTVCC = 0V TAGE (mV) 60 65 5.00 EXTVCC = 8.5V 50 60 40 55 4.75 VOLTAGE (V) 50 CC 30 4.50 EXTV 45 INTV CC = 5V 20 QUIESCENT CURRENT (µA) 40 4.25 10 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) 38903 G16 38903 G17 38903 G18 38903f 6 For more information www.linear.com/3890-3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Typical Performance Characteristics Operation Package Description Typical Application
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 EXTVCC RISING VOL Y CURRENT (µA) 4.8 V CC 4.0 100 AND INTV 4.6 EXTV SUPPL CC FALLING INT NO LOAD CC 4.4 3.5 50 EXTV 4.2 ILOAD = 10mA 0 4.0 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) 38903 G10 38903 G12 38903 G11
Maximum Current Sense Voltage Maximum Current Sense vs ITH Voltage SENSE– Pin Input Bias Current Threshold vs Duty Cycle
80 800 90 5% DUTY CYCLE 700 60 85 600 PULSE-SKIPPING MODE TAGE (mV) 40 500 Burst Mode 80 OPERATION 400 20 75 300 – CURRENT (µA) 0 200 70 SENSE 100 CURRENT SENSE THESHOLD (mV) –20 65 0 FORCED CONTINUOUS MODE MAXIMUM CURRENT SENSE VOL –40 –100 60 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) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 38903 G13 38903 G14 38903 G15
Current Limit vs Feedback Voltage Quiescent Current vs Temperature INTVCC vs Load Current
80 80 5.50 VIN = 12V VIN = 12V 75 70 5.25 70 EXTVCC = 0V TAGE (mV) 60 65 5.00 EXTVCC = 8.5V 50 60 40 55 4.75 VOLTAGE (V) 50 CC 30 4.50 EXTV 45 INTV CC = 5V 20 QUIESCENT CURRENT (µA) 40 4.25 10 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) 38903 G16 38903 G17 38903 G18 38903f 6 For more information www.linear.com/3890-3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Typical Performance Characteristics Operation Package Description Typical Application
