Datasheet LTC3736-1 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Dual 2-Phase, No RSENSE , Synchronous Controller with Spread Spectrum |
| Pages / Page | 28 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise noted. … |
| File Format / Size | PDF / 541 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS TA = 25. C unless otherwise noted. Maximum Current Sense Voltage
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LTC3736-1
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. Maximum Current Sense Voltage Efficiency and Power Lost vs vs ITH Pin Voltage Load Current Efficiency vs Load Current
100 10 100 100 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VOUT = 2.5V 95 95 VOUT = 2.5V 80 VIN = 5V 90 90 1 85 EFFICIENCY (%) 85 60 80 80 40 0.1 75 75 70 70 20 POWER LOST (W) EFFICIENCY (%) CURRENT LIMIT (%) 65 65 0.01 VIN = 5V 60 60 0 VIN = 3.3V VIN = 4.2V 55 55 SPREAD SPECTRUM VIN = 7.2V CONSTANT 550kHz –20 0.001 50 50 0.5 1 1.5 2 1 10 100 1000 10000 1 10 100 1000 10000 ITH VOLTAGE (V) LOAD CURRENT (mA) LOAD CURRENT (mA) 37361 G09 37361 G10 37361 G19
Regulated Feedback Voltage Shutdown (RUN) Threshold RUN/SS Pull-Up Current vs Temperature vs Temperature vs Temperature
1.0 0.609 1.0 0.9 0.607 A) 0.9 0.8 µ 0.605 0.7 0.603 0.8 0.6 0.601 0.5 0.7 0.599 0.4 0.597 0.6 RUN/SS VOLTAGE (V) 0.3 FEEDBACK VOLTAGE (V) 0.595 0.2 RUN/SS PULL-UP CURRENT ( 0.5 0.593 0.1 0.591 0 0.4 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE ( TEMPERATURE ( °C) °C) TEMPERATURE (°C) 37361 G11 37361 G12 37361 G13
Maximum Current Sense Threshold Oscillator Frequency Undervoltage Lockout Threshold vs Temperature vs Temperature vs Temperature
135 10 2.50 IPRG = FLOAT SSDIS = VIN 8 2.45 6 VIN RISING 130 2.40 4 2 2.35 125 0 ) VOLTAGE (V) 2.30 IN V –2 IN FALLING 2.25 –4 120 INPUT (V 2.20 NORMALIZED FREQUENCY (%) –6 –8 2.15 MAXIMUM CURRENT SENSE THRESHOLD (mV) 115 –10 2.10 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 37361 G14 37361 G15 37361 G16 37361f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. Maximum Current Sense Voltage Efficiency and Power Lost vs vs ITH Pin Voltage Load Current Efficiency vs Load Current
100 10 100 100 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VOUT = 2.5V 95 95 VOUT = 2.5V 80 VIN = 5V 90 90 1 85 EFFICIENCY (%) 85 60 80 80 40 0.1 75 75 70 70 20 POWER LOST (W) EFFICIENCY (%) CURRENT LIMIT (%) 65 65 0.01 VIN = 5V 60 60 0 VIN = 3.3V VIN = 4.2V 55 55 SPREAD SPECTRUM VIN = 7.2V CONSTANT 550kHz –20 0.001 50 50 0.5 1 1.5 2 1 10 100 1000 10000 1 10 100 1000 10000 ITH VOLTAGE (V) LOAD CURRENT (mA) LOAD CURRENT (mA) 37361 G09 37361 G10 37361 G19
Regulated Feedback Voltage Shutdown (RUN) Threshold RUN/SS Pull-Up Current vs Temperature vs Temperature vs Temperature
1.0 0.609 1.0 0.9 0.607 A) 0.9 0.8 µ 0.605 0.7 0.603 0.8 0.6 0.601 0.5 0.7 0.599 0.4 0.597 0.6 RUN/SS VOLTAGE (V) 0.3 FEEDBACK VOLTAGE (V) 0.595 0.2 RUN/SS PULL-UP CURRENT ( 0.5 0.593 0.1 0.591 0 0.4 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE ( TEMPERATURE ( °C) °C) TEMPERATURE (°C) 37361 G11 37361 G12 37361 G13
Maximum Current Sense Threshold Oscillator Frequency Undervoltage Lockout Threshold vs Temperature vs Temperature vs Temperature
135 10 2.50 IPRG = FLOAT SSDIS = VIN 8 2.45 6 VIN RISING 130 2.40 4 2 2.35 125 0 ) VOLTAGE (V) 2.30 IN V –2 IN FALLING 2.25 –4 120 INPUT (V 2.20 NORMALIZED FREQUENCY (%) –6 –8 2.15 MAXIMUM CURRENT SENSE THRESHOLD (mV) 115 –10 2.10 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 37361 G14 37361 G15 37361 G16 37361f 5
