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LTC1438CG-ADJ Datasheet(PDF) 5 Page - Linear Technology |
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LTC1438CG-ADJ Datasheet(HTML) 5 Page - Linear Technology |
5 / 32 page 5 LTC1438/LTC1439 TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Input Voltage VOUT = 3.3V VIN – VOUT Dropout Voltage vs Load Current Efficiency vs Load Current VITH Pin Voltage vs Output Current Load Regulation Input Supply Current vs Input Voltage EXTVCC Switch Drop vs INTVCC Load Current INPUT VOLTAGE (V) 0 70 75 80 85 90 100 5 10 15 20 1438 G01 25 30 95 ILOAD = 1A ILOAD = 100mA VOUT = 3.3V Efficiency vs Input Voltage VOUT = 5V INPUT VOLTAGE (V) 0 70 75 80 85 90 100 5 10 15 20 1438 G02 25 30 95 ILOAD = 1A ILOAD = 100mA VOUT = 5V LOAD CURRENT (A) 0.001 50 55 65 70 75 100 85 0.01 0.1 1 1435 G03 60 90 95 80 10 Adaptive Power MODE CONTINUOUS MODE VIN = 10V VOUT = 5V RSENSE = 0.33Ω Burst Mode ® OPERATION LOAD CURRENT (A) 0 0 0.2 0.1 0.3 0.4 0.5 0.5 1.0 1.5 2.0 1438 G04 2.5 3.0 RSENSE = 0.033Ω VOUT DROP OF 5% M1, M2: Si4412 LOAD CURRENT (A) 0 0 0.5 1.0 1.5 2.0 1438 G05 2.5 3.0 – 0.25 – 0.50 – 0.75 –1.00 –1.25 –1.50 RSENSE = 0.033Ω OUTPUT CURRENT (%) 0 1.0 2.0 3.0 0.5 1.5 2.5 20 40 60 80 1438 G06 100 10 030 50 70 90 Burst Mode OPERATION CONTINUOUS/Adaptive Power MODE INPUT VOLTAGE (V) 0 0 0.5 1.0 1.5 2.0 2.5 0 5 10 15 20 25 30 35 5 10 15 20 1438 G07 25 30 SHUTDOWN CURRENT 5V OFF 3.3V ON 5V AND 3.3V ON 5V ON 3.3V OFF INTVCC LOAD CURRENT (mA) 0 200 300 20 1438 G09 100 0 5 10 15 25 30 –45 °C 25 °C 70 °C INTVCC Regulation vs INTVCC Load Current INTVCC LOAD CURRENT (mA) 0 0 1 50 40 1438 G08 –1 –2 10 20 30 2 70 °C 25 °C EXTVCC = 0V Burst Mode is a trademark of Linear Technology Corporation. |
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