Datasheet LT8705 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | 80V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller |
| Pages / Page | 44 / 9 — Typical perForMance characTerisTics TA = 25°C unless otherwise specified. … |
| File Format / Size | PDF / 508 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C unless otherwise specified. SRVO_xx Pin Activation
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LT8705
Typical perForMance characTerisTics TA = 25°C unless otherwise specified. SRVO_xx Pin Activation SHDN and MODE Pin Currents Internal VIN UVLO Thresholds
18 3.0 125 16 MODE 2.5 100 14 (mV) SHDN 75 12 2.0 10 50 REGULATION FBIN 8 1.5 25 FBOUT UVLO (V) REGULATION IMON_IN 6 -V V IN IMON_OUT 0 4 1.0 V PIN CURRENT INTO PIN (µA) –25 2 0.5 APPROACHING V 0 V PIN –50 –2 0 –75 0 3 6 9 12 15 18 21 24 27 30 –40 –20 0 20 40 60 80 100 120 –50 –25 0 25 50 75 100 125 150 PIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8705 G19 8705 G20 8705 G21
SRVO_xx Pin Activation Forced Continuous Mode Threshold Hysteresis Discontinuous Mode (Figure 14) (Figure 14)
50 SW1 40 20V/DIV SW1 50V/DIV 30 20 SW2 20V/DIV SW2 50V/DIV FBIN 10 FBOUT I I IMON_IN L L 2A/DIV 2A/DIV IMON_OUT PIN ACTIVATION THRESHOLD HYSTERSIS (mV) 0–50 –25 0 25 50 75 100 125 150 V 8705 G23 8705 G24 IN = 72V 5µs/DIV VIN = 36V 5µs/DIV TEMPERATURE (°C) VOUT = 48V VOUT = 48V 8705 G22
Forced Continuous Mode Forced Continuous Mode (Figure 14) (Figure 14)
SW1 20V/DIV SW1 50V/DIV SW2 SW2 20V/DIV 20V/DIV IL IL 2A/DIV 2A/DIV V 8705 G25 8705 G26 IN = 48V 5µs/DIV VIN = 72V 5µs/DIV VOUT = 48V VOUT = 48V 8705ff For more information www.linear.com/LT8705 9 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C unless otherwise specified. SRVO_xx Pin Activation SHDN and MODE Pin Currents Internal VIN UVLO Thresholds
18 3.0 125 16 MODE 2.5 100 14 (mV) SHDN 75 12 2.0 10 50 REGULATION FBIN 8 1.5 25 FBOUT UVLO (V) REGULATION IMON_IN 6 -V V IN IMON_OUT 0 4 1.0 V PIN CURRENT INTO PIN (µA) –25 2 0.5 APPROACHING V 0 V PIN –50 –2 0 –75 0 3 6 9 12 15 18 21 24 27 30 –40 –20 0 20 40 60 80 100 120 –50 –25 0 25 50 75 100 125 150 PIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8705 G19 8705 G20 8705 G21
SRVO_xx Pin Activation Forced Continuous Mode Threshold Hysteresis Discontinuous Mode (Figure 14) (Figure 14)
50 SW1 40 20V/DIV SW1 50V/DIV 30 20 SW2 20V/DIV SW2 50V/DIV FBIN 10 FBOUT I I IMON_IN L L 2A/DIV 2A/DIV IMON_OUT PIN ACTIVATION THRESHOLD HYSTERSIS (mV) 0–50 –25 0 25 50 75 100 125 150 V 8705 G23 8705 G24 IN = 72V 5µs/DIV VIN = 36V 5µs/DIV TEMPERATURE (°C) VOUT = 48V VOUT = 48V 8705 G22
Forced Continuous Mode Forced Continuous Mode (Figure 14) (Figure 14)
SW1 20V/DIV SW1 50V/DIV SW2 SW2 20V/DIV 20V/DIV IL IL 2A/DIV 2A/DIV V 8705 G25 8705 G26 IN = 48V 5µs/DIV VIN = 72V 5µs/DIV VOUT = 48V VOUT = 48V 8705ff For more information www.linear.com/LT8705 9 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
