Datasheet LTC3777 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | 150V VIN and VOUT Synchronous 4-Switch Buck-Boost Controller + Switching Bias Supply |
| Pages / Page | 40 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS. VINOV Transient Forced. Peak Current … |
| Revision | A |
| File Format / Size | PDF / 2.8 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. VINOV Transient Forced. Peak Current Threshold vs VITH. Continuous Mode Buck Region
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LTC3777
TYPICAL PERFORMANCE CHARACTERISTICS VINOV Transient Forced Peak Current Threshold vs VITH Continuous Mode Buck Region Current Foldback Limit (Boost)
200 200 SW1 BOOST 100V/DIV 150 150 SW2 100 100 100A/DIV IL 50 50 10A/DIV 0 0 VOUT 50V/DIV –50 –50 10ms/DIV 3777 G27 V –100 –100 IN = 120V V BUCK OUT = 48V CURRENT LIMIT (SENSEP – SENSEN) (mV) CURRENT LIMIT (SENSEP – SENSEN) (mV) 50Ω RESISTIVE LOAD –150 –150 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 VFB (V) VITH (V) 3777 G28 3777 G29
Valley Current Threshold vs VITH Maximum Current Limit Regulated Feedback Voltage (Buck) vs Temperature vs Temperature
100 200 1220 150 50 BOOST 1210 100 50 TAGE (mV) 0 1200 0 –50 –50 BUCK FEEDBACK VOL 1190 –100 CURRENT LIMIT (SENSEP – SENSEN) (mV) CURRENT LIMIT (SENSEP – SENSEN) (mV) –100 –150 1180 0 0.2 0.4 0.6 0.8 1.1 1.3 1.5 1.7 1.9 2.1 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VITH (V) TEMPERATURE (°C) TEMPERATURE (°C) 3777 G30 3777 G31 3777 G32
Undervoltage Lockout Threshold V5 Low Dropout Regulation (V5) vs Temperature Voltage vs Temperature EXTVCC LDO vs Temperature
4.4 5.7 12 EXTVCC = 30V 4.3 11 RISING 4.2 5.6 DRVSET = V5 10 4.1 DRVSET = 3/4 • V5 TAGE (V) 9 4.0 5.5 DRVSET = 1/2 • V5 VCC (V) 8 3.9 DR DRVSET = 1/4 • V5 UVLO THRESHOLD (V) V5 LDO VOL 7 3.8 5.4 DRVSET = GND FALLING 3.7 6 3.6 5.3 5 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3777 G33 3777 G34 3777 G35 Rev A For more information www.analog.com 9 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS – SWITCHING BIAS SUPPLY PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS VINOV Transient Forced Peak Current Threshold vs VITH Continuous Mode Buck Region Current Foldback Limit (Boost)
200 200 SW1 BOOST 100V/DIV 150 150 SW2 100 100 100A/DIV IL 50 50 10A/DIV 0 0 VOUT 50V/DIV –50 –50 10ms/DIV 3777 G27 V –100 –100 IN = 120V V BUCK OUT = 48V CURRENT LIMIT (SENSEP – SENSEN) (mV) CURRENT LIMIT (SENSEP – SENSEN) (mV) 50Ω RESISTIVE LOAD –150 –150 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 VFB (V) VITH (V) 3777 G28 3777 G29
Valley Current Threshold vs VITH Maximum Current Limit Regulated Feedback Voltage (Buck) vs Temperature vs Temperature
100 200 1220 150 50 BOOST 1210 100 50 TAGE (mV) 0 1200 0 –50 –50 BUCK FEEDBACK VOL 1190 –100 CURRENT LIMIT (SENSEP – SENSEN) (mV) CURRENT LIMIT (SENSEP – SENSEN) (mV) –100 –150 1180 0 0.2 0.4 0.6 0.8 1.1 1.3 1.5 1.7 1.9 2.1 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VITH (V) TEMPERATURE (°C) TEMPERATURE (°C) 3777 G30 3777 G31 3777 G32
Undervoltage Lockout Threshold V5 Low Dropout Regulation (V5) vs Temperature Voltage vs Temperature EXTVCC LDO vs Temperature
4.4 5.7 12 EXTVCC = 30V 4.3 11 RISING 4.2 5.6 DRVSET = V5 10 4.1 DRVSET = 3/4 • V5 TAGE (V) 9 4.0 5.5 DRVSET = 1/2 • V5 VCC (V) 8 3.9 DR DRVSET = 1/4 • V5 UVLO THRESHOLD (V) V5 LDO VOL 7 3.8 5.4 DRVSET = GND FALLING 3.7 6 3.6 5.3 5 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3777 G33 3777 G34 3777 G35 Rev A For more information www.analog.com 9 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS – SWITCHING BIAS SUPPLY PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
