Datasheet LT1738 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | Slew Rate Controlled Ultralow Noise DC/DC Controller |
| Páginas / Página | 20 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. SHDN Pin Hysteresis Current vs. CS … |
| Formato / tamaño de archivo | PDF / 260 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFOR A CE CHARACTERISTICS. SHDN Pin Hysteresis Current vs. CS Pin to VC Pin Transfer. Temperature
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LT1738
W U TYPICAL PERFOR A CE CHARACTERISTICS SHDN Pin Hysteresis Current vs CS Pin to VC Pin Transfer Temperature VIN Current vs Temperature Function
27 18 1.6 TA = 25°C 17 V 1.4 IN = 12 RVSL, RCSL = 4.85k 25 µA) 16 1.2 23 15 1.0 VIN = 20 RVSL, RCSL = 17k 21 14 0.8 CURRENT (mA) 13 V IN IN = 12 RVSL, RCSL = 17k PIN VOLTAGE (V) 0.6 19 C V V SHDN PIN CURRENT ( 12 0.4 17 11 USING LOAD OF FIGURE 1A 0.2 fOSC = 120kHz 15 10 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) CS PIN VOLTAGE (mV) 1738 G09 1738 G10 1738 G11
Gate Drive High Voltage vs Gate Drive Low Voltage vs Slope Compensation Temperature Temperature
110 10.7 6.5 0.50 VC PIN = 0.9V 10.6 6.4 0.45 VIN = 12V T NO LOAD 100 A = 25°C 10.5 GCL = 12V 6.3 0.40 10.4 6.2 0.35 90 10.3 V 6.1 IN = 12V 0.30 NO LOAD 80 10.2 6.0 0.25 10.1 5.9 0.20 70 10.0 5.8 0.15 GCL = 6V PERCENT OF MAX CS VOLTAGE 9.90 5.7 0.10 60 GATE DRIVE A/B PIN VOLTAGE (V) GATE DRIVE A/B PIN VOLTAGE (V) 9.80 5.6 0.05 50 9.70 5.5 0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 1738 G12 1738 G13 1738 G14
Gate Drive Undervoltage Lockout Soft-Start Current vs Temperature V5 Voltage vs Load Current Voltage vs Temperature
7.3 9.5 5.08 7.2 GCL = 6V 9.3 SS VOLTAGE = 0.9V 5.06 7.1 9.1 T = 125°C 7.0 µA) 8.9 5.04 6.9 8.7 6.8 8.5 5.02 T = 25°C 6.7 8.3 PIN VOLTAGE (V) IN 5.00 V 6.6 SS PIN CURRENT ( 8.1 V5 PIN VOLTAGE (V) T = –40°C 6.5 7.9 4.98 6.4 7.7 6.3 7.5 4.96 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –15 –10 –5 0 5 10 15 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 1738 G15 1738 G16 1738 G17 1738fa 5
W U TYPICAL PERFOR A CE CHARACTERISTICS SHDN Pin Hysteresis Current vs CS Pin to VC Pin Transfer Temperature VIN Current vs Temperature Function
27 18 1.6 TA = 25°C 17 V 1.4 IN = 12 RVSL, RCSL = 4.85k 25 µA) 16 1.2 23 15 1.0 VIN = 20 RVSL, RCSL = 17k 21 14 0.8 CURRENT (mA) 13 V IN IN = 12 RVSL, RCSL = 17k PIN VOLTAGE (V) 0.6 19 C V V SHDN PIN CURRENT ( 12 0.4 17 11 USING LOAD OF FIGURE 1A 0.2 fOSC = 120kHz 15 10 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) CS PIN VOLTAGE (mV) 1738 G09 1738 G10 1738 G11
Gate Drive High Voltage vs Gate Drive Low Voltage vs Slope Compensation Temperature Temperature
110 10.7 6.5 0.50 VC PIN = 0.9V 10.6 6.4 0.45 VIN = 12V T NO LOAD 100 A = 25°C 10.5 GCL = 12V 6.3 0.40 10.4 6.2 0.35 90 10.3 V 6.1 IN = 12V 0.30 NO LOAD 80 10.2 6.0 0.25 10.1 5.9 0.20 70 10.0 5.8 0.15 GCL = 6V PERCENT OF MAX CS VOLTAGE 9.90 5.7 0.10 60 GATE DRIVE A/B PIN VOLTAGE (V) GATE DRIVE A/B PIN VOLTAGE (V) 9.80 5.6 0.05 50 9.70 5.5 0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 1738 G12 1738 G13 1738 G14
Gate Drive Undervoltage Lockout Soft-Start Current vs Temperature V5 Voltage vs Load Current Voltage vs Temperature
7.3 9.5 5.08 7.2 GCL = 6V 9.3 SS VOLTAGE = 0.9V 5.06 7.1 9.1 T = 125°C 7.0 µA) 8.9 5.04 6.9 8.7 6.8 8.5 5.02 T = 25°C 6.7 8.3 PIN VOLTAGE (V) IN 5.00 V 6.6 SS PIN CURRENT ( 8.1 V5 PIN VOLTAGE (V) T = –40°C 6.5 7.9 4.98 6.4 7.7 6.3 7.5 4.96 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –15 –10 –5 0 5 10 15 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 1738 G15 1738 G16 1738 G17 1738fa 5