Datasheet LTC7149 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 60V, 4A Synchronous Step-Down Regulator for Inverting Outputs |
| Pages / Page | 26 / 5 — Load Regulation. ISET Current vs Temperature. ISET Current vs VISET. ISET … |
| File Format / Size | PDF / 482 Kb |
| Document Language | English |
Load Regulation. ISET Current vs Temperature. ISET Current vs VISET. ISET Voltage Line Regulation
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LTC7149 TYPICAL PERFORMANCE CHARACTERISTICS
Load Regulation ISET Current vs Temperature ISET Current vs VISET
101 50.5 51 50.3 50 (%) 100 OUT 50.1 49 (µA) (µA) I SET 49.9 I SET 48 99 NORMALIZED V 49.7 47 VIN = 24V FC MODE VOUT = –5V Burst Mode Operation VIN = 24V 98 49.5 46 0 1 2 3 4 –55 –35 –15 5 25 45 65 85 105 125 0 4 8 12 16 20 24 IOUT (A) TEMPERATURE (°C) VISET 7149 G01 7149 G02 7149 G03
ISET Voltage Line Regulation Quiescent Current vs Temperature Shutdown Current vs VIN
5.01 500 20 SLEEP 5.00 400 16 4.99 300 12 (V) (µA) (µA) V ISET I Q I Q 4.97 200 8 4.96 100 4 RISET = 100kΩ SHUTDOWN 4.95 0 0 0 10 20 30 40 50 60 –55 –35 –15 5 25 45 65 85 105 125 0 10 20 30 40 50 60 VIN (V) TEMPERATURE (°C) VIN (V) 7149 G04 7149 G05 7149 G06
RDS(ON) vs Temperature Transient Response, CCM Transient Response, DCM
200 VOUT VOUT 160 AC–COUPLED AC–COUPLED 100mV/DIV 100mV/DIV MTOP 120 IL IL (mΩ) 3A/DIV 2A/DIV R DSON 80 ILOAD MBOT I 3A/DIV LOAD 2A/DIV 40 20µs/DIV 7149 G08 20µs/DIV 7149 G09 VIN = 24V, VOUT = –3.3V VIN = 24V, VOUT = –3.3V 0 IOUT = 0A to 3A, L = 2.2μH, fSW = 1MHz IOUT = 0.2A to 2A, L = 2.2μH, fSW = 1MHz –55 –35 –15 5 25 45 65 85 105 125 RITH = 1kΩ, CITH = 2.2nF, CITHP = 100pF RITH = 1kΩ, CITH = 2.2nF, CITHP = 100pF TEMPERATURE (°C) COUT = 2 × 22μF + 150μF COUT = 2 × 22μF + 150μF 7149 G07 7149fa For more information www.linear.com/LTC7149 5
Load Regulation ISET Current vs Temperature ISET Current vs VISET
101 50.5 51 50.3 50 (%) 100 OUT 50.1 49 (µA) (µA) I SET 49.9 I SET 48 99 NORMALIZED V 49.7 47 VIN = 24V FC MODE VOUT = –5V Burst Mode Operation VIN = 24V 98 49.5 46 0 1 2 3 4 –55 –35 –15 5 25 45 65 85 105 125 0 4 8 12 16 20 24 IOUT (A) TEMPERATURE (°C) VISET 7149 G01 7149 G02 7149 G03
ISET Voltage Line Regulation Quiescent Current vs Temperature Shutdown Current vs VIN
5.01 500 20 SLEEP 5.00 400 16 4.99 300 12 (V) (µA) (µA) V ISET I Q I Q 4.97 200 8 4.96 100 4 RISET = 100kΩ SHUTDOWN 4.95 0 0 0 10 20 30 40 50 60 –55 –35 –15 5 25 45 65 85 105 125 0 10 20 30 40 50 60 VIN (V) TEMPERATURE (°C) VIN (V) 7149 G04 7149 G05 7149 G06
RDS(ON) vs Temperature Transient Response, CCM Transient Response, DCM
200 VOUT VOUT 160 AC–COUPLED AC–COUPLED 100mV/DIV 100mV/DIV MTOP 120 IL IL (mΩ) 3A/DIV 2A/DIV R DSON 80 ILOAD MBOT I 3A/DIV LOAD 2A/DIV 40 20µs/DIV 7149 G08 20µs/DIV 7149 G09 VIN = 24V, VOUT = –3.3V VIN = 24V, VOUT = –3.3V 0 IOUT = 0A to 3A, L = 2.2μH, fSW = 1MHz IOUT = 0.2A to 2A, L = 2.2μH, fSW = 1MHz –55 –35 –15 5 25 45 65 85 105 125 RITH = 1kΩ, CITH = 2.2nF, CITHP = 100pF RITH = 1kΩ, CITH = 2.2nF, CITHP = 100pF TEMPERATURE (°C) COUT = 2 × 22μF + 150μF COUT = 2 × 22μF + 150μF 7149 G07 7149fa For more information www.linear.com/LTC7149 5
