Datasheet LTC3877 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Dual Phase Step-Down Synchronous Controller with VID Output Voltage Programming and Low Value DCR Sensing |
| Pages / Page | 46 / 8 — Typical perForMance characTerisTics. Shutdown (RUN) Threshold. … |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
Typical perForMance characTerisTics. Shutdown (RUN) Threshold. Undervoltage Lockout Threshold. Quiescent Current
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LTC3877
Typical perForMance characTerisTics Shutdown (RUN) Threshold Undervoltage Lockout Threshold Quiescent Current vs Temperature (INTVCC) vs Temperature vs Temperature without EXTVCC
1.35 5 10 9.5 1.3 ON 9.0 4.5 1.25 RISING 8.5 1.2 8.0 OFF 4 7.5 1.15 FALLING 7.0 1.1 UVLO THRESHOLD (V) 6.5 RUN PIN THRESHOLD (V) 3.5 QUIESCENT CURRENT (mA) 6.0 1.05 V IN 5.5 1 3 5.0 –55–40–25–10 5 20 35 50 65 80 95 110125 –55–40–25–10 5 20 35 50 65 80 95 110125 –55 –30 –5 20 45 70 95 120 145 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3877 G19 3877 G20 3877 G21
Quiescent Current Shutdown Current vs Input Voltage without EXTVCC Shutdown Current vs Temperature vs Input Voltage
10 60 50 9 45 8 50 40 7 40 35 6 30 5 30 25 4 20 3 20 15 QUIESCENT CURRENT (mA) SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT (µA) V IN 2 V IN 10 10 V IN 1 5 0 0 0 0 10 20 30 40 –55–40–25–10 5 20 35 50 65 80 95 110125 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3877 G22 3877 G23 3877 G24
VID_EN Transient VID_EN Transient VID Transient with All VID Pins Low with All VID Pins High (Figure 16 Application Circuit) (Figure 16 Application Circuit) (Figure 16 Application Circuit)
VID0 ~ VID5 VID_EN VID_EN IL1, IL2 IL1, IL2 IL1, IL2 20A/DIV 20A/DIV 20A/DIV VOUT VOUT VOUT 50µs/DIV 3877 G25 50µs/DIV 3877 G26 50µs/DIV 3877 G27 VID_EN HIGH ALL VID PINS LOW ALL VID PINS HIGH CCM, 40mΩ LOAD CCM, 40mΩ LOAD CCM, 40mΩ LOAD VOUT = 0.6V TO 1.23V TO 0.6V VOUT = 0.9V TO 0.6V TO 0.9V VOUT = 0.9V TO 1.23V TO 0.9V 3877f 8 For more information www.linear.com/LTC3877
Typical perForMance characTerisTics Shutdown (RUN) Threshold Undervoltage Lockout Threshold Quiescent Current vs Temperature (INTVCC) vs Temperature vs Temperature without EXTVCC
1.35 5 10 9.5 1.3 ON 9.0 4.5 1.25 RISING 8.5 1.2 8.0 OFF 4 7.5 1.15 FALLING 7.0 1.1 UVLO THRESHOLD (V) 6.5 RUN PIN THRESHOLD (V) 3.5 QUIESCENT CURRENT (mA) 6.0 1.05 V IN 5.5 1 3 5.0 –55–40–25–10 5 20 35 50 65 80 95 110125 –55–40–25–10 5 20 35 50 65 80 95 110125 –55 –30 –5 20 45 70 95 120 145 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3877 G19 3877 G20 3877 G21
Quiescent Current Shutdown Current vs Input Voltage without EXTVCC Shutdown Current vs Temperature vs Input Voltage
10 60 50 9 45 8 50 40 7 40 35 6 30 5 30 25 4 20 3 20 15 QUIESCENT CURRENT (mA) SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT (µA) V IN 2 V IN 10 10 V IN 1 5 0 0 0 0 10 20 30 40 –55–40–25–10 5 20 35 50 65 80 95 110125 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3877 G22 3877 G23 3877 G24
VID_EN Transient VID_EN Transient VID Transient with All VID Pins Low with All VID Pins High (Figure 16 Application Circuit) (Figure 16 Application Circuit) (Figure 16 Application Circuit)
VID0 ~ VID5 VID_EN VID_EN IL1, IL2 IL1, IL2 IL1, IL2 20A/DIV 20A/DIV 20A/DIV VOUT VOUT VOUT 50µs/DIV 3877 G25 50µs/DIV 3877 G26 50µs/DIV 3877 G27 VID_EN HIGH ALL VID PINS LOW ALL VID PINS HIGH CCM, 40mΩ LOAD CCM, 40mΩ LOAD CCM, 40mΩ LOAD VOUT = 0.6V TO 1.23V TO 0.6V VOUT = 0.9V TO 0.6V TO 0.9V VOUT = 0.9V TO 1.23V TO 0.9V 3877f 8 For more information www.linear.com/LTC3877
