Datasheet LT8631 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 100V, 1A Synchronous Micropower Step-Down Regulator |
| Pages / Page | 26 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Line Regulation. Load Regulation. FB … |
| File Format / Size | PDF / 375 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Line Regulation. Load Regulation. FB to TR/SS Offset Voltage. Soft-Start Tracking
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Text Version of Document
LT8631
TYPICAL PERFORMANCE CHARACTERISTICS Line Regulation Load Regulation FB to TR/SS Offset Voltage
1.0 1.0 10 VOUT = 5V VIN = 12V LOAD = 0.5A VOUT = 5V 9 0.5 0.5 8 (%) (%) 7 OUT OUT (mV) 0.0 0.0 TR/SS 6 – V 5 V FB CHANGE IN V CHANGE IN V –0.5 –0.5 4 3 VTR/SS = 0.4V LOAD = 0.5A –1.0 –1.0 2 0 25 50 75 100 0 0.25 0.5 0.75 1 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) LOAD CURRENT (A) TEMPERATURE (°C) 8631 G19 8631 G20 8631 G21
Soft-Start Tracking PG High Thresholds PG Low Thresholds
1.0 12 –5 LOAD = 0.5A 0.9 11 –6 0.8 0.7 (%) 10 (%) –7 REF REF 0.6 9 –8 TAGE (V) 0.5 –9 0.4 8 FB VOL 0.3 7 –10 0.2 PG OFFSET FROM V PG OFFSET FROM V 6 –11 0.1 VFB RISING VFB RISING V VFB FALLING 0 5 FB FALLING –12 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TR/SS VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8631 G22 8631 G23 8631 G24
Dropout Voltage Burst Waveforms
5.50 VIN 5V 5.25 VOUT SET TO 5V VSW 5V/DIV 5.00 4.75 VOUT TAGE (V) 20mV/DIV 4.50 IL 200mA/DIV 4.25 5µs/DIV 8631 G26 OUTPUT VOL 4.00 FRONT PAGE APPLICATION VIN = 12V 3.75 LOAD = 5mA 3.50 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 LOAD CURRENT (A) 8631 G25 8631fb For more information www.linear.com/LT8631 7
TYPICAL PERFORMANCE CHARACTERISTICS Line Regulation Load Regulation FB to TR/SS Offset Voltage
1.0 1.0 10 VOUT = 5V VIN = 12V LOAD = 0.5A VOUT = 5V 9 0.5 0.5 8 (%) (%) 7 OUT OUT (mV) 0.0 0.0 TR/SS 6 – V 5 V FB CHANGE IN V CHANGE IN V –0.5 –0.5 4 3 VTR/SS = 0.4V LOAD = 0.5A –1.0 –1.0 2 0 25 50 75 100 0 0.25 0.5 0.75 1 –50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) LOAD CURRENT (A) TEMPERATURE (°C) 8631 G19 8631 G20 8631 G21
Soft-Start Tracking PG High Thresholds PG Low Thresholds
1.0 12 –5 LOAD = 0.5A 0.9 11 –6 0.8 0.7 (%) 10 (%) –7 REF REF 0.6 9 –8 TAGE (V) 0.5 –9 0.4 8 FB VOL 0.3 7 –10 0.2 PG OFFSET FROM V PG OFFSET FROM V 6 –11 0.1 VFB RISING VFB RISING V VFB FALLING 0 5 FB FALLING –12 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TR/SS VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8631 G22 8631 G23 8631 G24
Dropout Voltage Burst Waveforms
5.50 VIN 5V 5.25 VOUT SET TO 5V VSW 5V/DIV 5.00 4.75 VOUT TAGE (V) 20mV/DIV 4.50 IL 200mA/DIV 4.25 5µs/DIV 8631 G26 OUTPUT VOL 4.00 FRONT PAGE APPLICATION VIN = 12V 3.75 LOAD = 5mA 3.50 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 LOAD CURRENT (A) 8631 G25 8631fb For more information www.linear.com/LT8631 7
