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LTC1147IS8-5 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1147IS8-5 Datasheet(HTML) 3 Page - Linear Technology |
3 / 16 page 3 LTC1147-3.3 LTC1147-5/LTC1147L sn1147 1147fds TA = 25°C, VIN = 10V, VSHDN = 0V, unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V5 – V4 Current Sense Threshold Voltage (Note 6) LTC1147-3.3, LTC1147L-3.3 VSENSE – = VOUT + 100mV (Forced) 25 mV VSENSE– = VOUT – 100mV (Forced) 130 150 170 mV LTC1147–5 VSENSE – = VOUT + 100mV (Forced) 25 mV VSENSE– = VOUT – 100mV (Forced) 130 150 170 mV LTC1147L VSENSE – = 5V, V6 = VOUT/4 + 25mV (Forced) 25 mV VSENSE– = 5V, V6 = VOUT/4 – 25mV (Forced) 130 150 170 mV V6 SHDN Pin Threshold LTC1147-3.3/LTC1147-5/LTC1147L-3.3 0.5 0.8 2 V I6 SHDN Pin Input Current LTC1147-3.3/LTC1147-5/LTC1147L-3.3 0V < VSHDN < 8V, VIN = 16V 1.2 5 µA I2 CT Pin Discharge Current VOUT in Regulation, VSENSE – = VOUT 50 70 90 µA VOUT = 0V 2 10 µA tOFF Off-Time (Note 3) CT = 390pF, ILOAD = 700mA 4 5 6 µs tr, tf Driver Output Transition Times CL = 3000pF (Pin 8), VIN = 6V 100 200 ns SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V6 Feedback Voltage (LTC1147L) VIN = 9V q 1.20 1.25 1.30 V VOUT Regulated Output Voltage VIN = 9V LTC1147-3.3/LTC1147L-3.3 ILOAD = 700mA q 3.17 3.33 3.43 V LTC1147-5 ILOAD = 700mA q 4.85 5.05 5.20 V IQ Input DC Supply Current (Note 2) (Note 5) LTC1147 Series Normal Mode 4V < VIN < 12V 1.6 2.4 mA Sleep Mode 4V < VIN < 12V 160 260 µA Sleep Mode (LTC1147-5) 5V < VIN < 12V 160 260 µA Shutdown VSHDN = 2.1V, 4V < VIN < 12V 10 22 µA LTC1147L Series Normal Mode 3.5V < VIN < 12V 1.6 2.4 mA Sleep Mode 3.5V < VIN < 12V 160 260 µA Shutdown (LTC1147L-3.3) VSHDN = 2.1V, 3.5V < VIN < 12V 10 22 µA V5 – V4 Current Sense Threshold Voltage (Note 6) LTC1147-3.3 VSENSE– = VOUT + 100mV (Forced) 25 mV VSENSE– = VOUT – 100mV (Forced) q 125 150 185 mV LTC1147-5 VSENSE– = VOUT + 100mV (Forced) 25 mV VSENSE– = VOUT – 100mV (Forced) q 125 150 185 mV LTC1147L VSENSE– = 5V, 6V = VOUT/4 + 25mV (Forced) 25 mV VSENSE– = 5V, 6V = VOUT/4 – 25mV (Forced) 125 150 185 mV V6 SHDN Pin Threshold LTC1147-3.3/LTC1147-5/LTC1147L-3.3 0V < VSHDN < 8V, VIN = 16V 0.5 0.8 2 V tOFF Off-Time (Note 3) CT = 390pF, ILOAD = 700mA 3.8 5 6.5 µs The q denotes specifications which apply over the full specified temperature range. Note 1: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: LTC1147CN8-3.3/LTC1147CN8-5: TJ = TA + (PD)(110°C/W) LTC1147LIS/LTC1147IS8/LTC1147LCS/ LTC1147CS8-3.3/LTC1147CS8-5: TJ = TA + (PD)(150°C/W) Note 2: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information. Note 3: In applications where RSENSE is placed at ground potential, the off- time increases approximately 40%. Note 4: The LTC1147C is guaranteed to meet specified performance from 0 °C to 70°C and is designed, characterized and expected to meet these extended temperature limits, but is not tested at – 40 °C and 85°C. The LTC1147I is guaranteed to meet the extended temperature limits. Note 5: The LTC1147L/LTC1147L-3.3 allow operation to VIN = 3.5V. Note 6: The LTC1147L is tested with external feedback resistors resulting in a nominal output voltage of 2.5V. –40 °C ≤ TA ≤ 85°C (Note 4), VIN = 10V, unless otherwise noted. |
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