Datasheet LTC3839 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller with Differential Output Sensing |
| Pages / Page | 50 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS |
| File Format / Size | PDF / 944 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS
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LTC3839
TYPICAL PERFORMANCE CHARACTERISTICS Note: tON(MIN) and tOFF(MIN) are measured with TG and BG pins open for sharper rising and falling edges. Output Regulation Output Regulation Output Regulation vs Input Voltage vs Load Current vs Temperature
0.2 0.2 0.6 VOUT = 0.6V VIN = 15V VIN = 15V ILOAD = 5A VOUT = 0.6V VOUT = 0.6V VOUT NORMALIZED AT VIN = 15V VOUT NORMALIZED AT ILOAD = 8A 0.4 ILOAD = 0A 0.1 0.1 VOUT NORMALIZED AT TA = 25°C (%) (%) (%) 0.2 OUT OUT OUT 0 0 0 –0.2 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.4 –0.2 –0.2 –0.6 0 5 10 15 20 25 30 35 40 0 4 8 12 16 20 –50 –25 0 25 50 75 100 125 150 VIN (V) ILOAD (A) TEMPERATURE (°C) 3839 G18 3839 G19 3839 G20
Error Amplifier Transconductance CLKOUT/Switching Frequency CLKOUT/Switching Frequency vs Temperature vs Input Voltage vs Temperature
1.80 2 2 VIN = 15V, VOUT = 0.6V ILOAD = 0A 1.75 f = 500kHz 1 1 FREQUENCY NORMALIZED AT TA = 25°C 1.70 (%) (%) 1.65 0 0 1.60 NORMALIZED ∆f NORMALIZED ∆f –1 –1 TRANSCONDUCTANCE (mS) VOUT = 0.6V 1.55 ILOAD = 5A f = 500kHz FREQUENCY NORMALIZED AT VIN = 15V 1.50 –2 –2 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3839 G27 3839 G21 3839 G23
tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) vs VOUT (Voltage on SENSE– Pin) vs Voltage on VIN Pin vs Switching Frequency
100 100 100 90 90 t 90 OFF(MIN) tOFF(MIN) tOFF(MIN) 80 80 80 70 70 70 60 60 60 50 50 50 tON(MIN) tON(MIN) TIME (ns) 40 TIME (ns) 40 TIME (ns) 40 t 30 30 30 ON(MIN) 20 20 20 10 VIN = 38V 10 VOUT = 0.6V 10 VIN = 38V RT ADJUSTED FOR fCLKOUT = 2MHz RT ADJUSTED FOR fCLKOUT = 2MHz VOUT = 0.6V 0 0 0 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 40 200 500 800 1100 1400 1700 2000 V – SENSE (V) VIN (V) CLKOUT/SWITCHING FREQUENCY (kHz) 3839 G24 3839 G25 3839 G26 3839fa 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagram Operation Typical Applications Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Note: tON(MIN) and tOFF(MIN) are measured with TG and BG pins open for sharper rising and falling edges. Output Regulation Output Regulation Output Regulation vs Input Voltage vs Load Current vs Temperature
0.2 0.2 0.6 VOUT = 0.6V VIN = 15V VIN = 15V ILOAD = 5A VOUT = 0.6V VOUT = 0.6V VOUT NORMALIZED AT VIN = 15V VOUT NORMALIZED AT ILOAD = 8A 0.4 ILOAD = 0A 0.1 0.1 VOUT NORMALIZED AT TA = 25°C (%) (%) (%) 0.2 OUT OUT OUT 0 0 0 –0.2 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.1 NORMALIZED ∆V –0.4 –0.2 –0.2 –0.6 0 5 10 15 20 25 30 35 40 0 4 8 12 16 20 –50 –25 0 25 50 75 100 125 150 VIN (V) ILOAD (A) TEMPERATURE (°C) 3839 G18 3839 G19 3839 G20
Error Amplifier Transconductance CLKOUT/Switching Frequency CLKOUT/Switching Frequency vs Temperature vs Input Voltage vs Temperature
1.80 2 2 VIN = 15V, VOUT = 0.6V ILOAD = 0A 1.75 f = 500kHz 1 1 FREQUENCY NORMALIZED AT TA = 25°C 1.70 (%) (%) 1.65 0 0 1.60 NORMALIZED ∆f NORMALIZED ∆f –1 –1 TRANSCONDUCTANCE (mS) VOUT = 0.6V 1.55 ILOAD = 5A f = 500kHz FREQUENCY NORMALIZED AT VIN = 15V 1.50 –2 –2 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VIN (V) TEMPERATURE (°C) 3839 G27 3839 G21 3839 G23
tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) vs VOUT (Voltage on SENSE– Pin) vs Voltage on VIN Pin vs Switching Frequency
100 100 100 90 90 t 90 OFF(MIN) tOFF(MIN) tOFF(MIN) 80 80 80 70 70 70 60 60 60 50 50 50 tON(MIN) tON(MIN) TIME (ns) 40 TIME (ns) 40 TIME (ns) 40 t 30 30 30 ON(MIN) 20 20 20 10 VIN = 38V 10 VOUT = 0.6V 10 VIN = 38V RT ADJUSTED FOR fCLKOUT = 2MHz RT ADJUSTED FOR fCLKOUT = 2MHz VOUT = 0.6V 0 0 0 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 40 200 500 800 1100 1400 1700 2000 V – SENSE (V) VIN (V) CLKOUT/SWITCHING FREQUENCY (kHz) 3839 G24 3839 G25 3839 G26 3839fa 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagram Operation Typical Applications Typical Application Related Parts
