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LTC1265 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1265 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page 3 LTC1265/LTC1265-3.3/LTC1265-5 Note 3: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. Note 4: In applications where RSENSE is placed at ground potential, the off time increases by approximately 40%. Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: LTC1265CS, LTC1265CS-3.3, LTC1265CS-5: TJ = TA + (PD • 110°C/W) LOAD CURRENT (A) 0.01 70 75 80 85 90 100 0.10 1.00 1265 G01 95 VIN = 5V VIN = 9V VIN = 12V LTC1265-3.3 VOUT = 3.3V RSENSE = 0.1Ω CT = 130pF COIL = CTX33-4 INPUT VOLTAGE (V) 4 80 82 86 88 90 100 94 6 8 913 LTC1265 G03 84 96 98 92 57 10 11 12 ILOAD = 250mA ILOAD = 800mA LTC1265-3.3 RSENSE = 0.1Ω CT = 130pF COIL = CTX33-4 INPUT VOLTAGE (V) 4 80 82 86 88 90 100 94 6 8 913 1265 G02 84 96 98 92 57 10 11 12 ILOAD = 250mA ILOAD = 800mA LTC1265-5 RSENSE = 0.1Ω CT = 130pF COIL = CTX33-4 Switch Resistance INPUT VOLTAGE (V) 3 0 0.1 0.3 0.4 0.5 7 11 13 0.9 1265 G05 0.2 59 6 10 12 48 0.6 0.7 0.8 TJ = 70°C TJ = 125°C TJ = 25°C TJ = 0°C (VIN – VOUT) VOLTAGE (V) 0 0.4 0.8 1.2 1.0 0.6 0.2 2 14 6 8 1265 G04 10 03 5 7 9 0 °C 25 °C 70 °C Operating Frequency vs (VIN – VOUT) Efficiency vs Input Voltage (VOUT = 3.3V) Efficiency vs Input Voltage (VOUT = 5V) Efficiency vs Load Current Switch Leakage Current TEMPERATURE ( °C) 0 180 240 300 270 210 150 90 30 80 1265 G06 120 60 0 20 40 60 100 VIN = 12V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIH Shutdown Pin High Min Voltage at Pin 10 for Device to be in Shutdown 1.2 V VIL Shutdown Pin Low Max Voltage at Pin 10 for Device to be Active 0.6 V I10 Shutdown Pin Input Current VSHDN = 8V 0.5 µA The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = 0V, unless otherwise specified. ELECTRICAL CHARACTERISTICS TYPICAL PERFOR A CE CHARACTERISTICS |
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