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LTC3707EGN-PBF Datasheet(PDF) 4 Page - Linear Technology |
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LTC3707EGN-PBF Datasheet(HTML) 4 Page - Linear Technology |
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4 / 32 page  LTC3707 4 3707fb Efficiency vs Output Current (Figure 13) Efficiency vs Input Voltage (Figure 13) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fHIGH Highest Frequency VFREQSET = 2.4V 280 310 360 kHz IFREQSET FREQSET Input Current VFREQSET = 0V –2 –1 μA 3.3V Linear Regulator V3.3OUT 3.3V Regulator Output Voltage No Load l 3.20 3.35 3.45 V V3.3IL 3.3V Regulator Load Regulation I3.3 = 0 to 10mA 0.5 2 % V3.3VL 3.3V Regulator Line Regulation 6V < VIN < 30V 0.05 0.2 % PGOOD Output VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V 1 μA VPG PGOOD Trip Level, Either Controller VOSENSE Respect to Set Output Voltage VOSENSE Ramping Negative VOSENSE Ramping Positive –6 6 –7.5 7.5 –9.5 9.5 % % Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3707E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the – 40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3707I is guaranteed to meet performance specifications over the full – 40°C to 85°C operating temperature range. Note 3: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: LTC3707EGN = TJ = TA + (PD • 85°C/W) Note 4: The LTC3707 is tested in a feedback loop that servos VITH1, 2 to a specified voltage and measures the resultant VOSENSE1, 2. Note 5: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information. Note 6: Rise and fall times are measured using 10% and 90% levels. Delay times are measured using 50% levels. Note 7: The IC minimum on-time is tested under an ideal condition without external power FETs. It can be different when the IC is working in an actual circuit. See Minimum On-Time Considerations in the Application Information section. Note 8: VFREQSET pin internally tied to a 1.19V reference through a large resistance. TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Output Current and Mode (Figure 13) OUTPUT CURRENT (A) 0.001 0 10 30 40 50 100 70 0.01 0.1 1 3707 G01 20 80 90 60 10 FORCED CONTINUOUS MODE (PWM) CONSTANT FREQUENCY (BURST DISABLE) Burst Mode OPERATION VIN = 15V VOUT = 5V OUTPUT CURRENT (A) 0.001 70 80 10 3707 G02 60 50 0.01 0.1 1 100 90 VIN = 10V VIN = 15V VIN = 7V VIN = 20V VIN = 15V VOUT = 5V INPUT VOLTAGE (V) 5 70 80 3707 G03 60 50 15 25 30 100 VOUT = 5V IOUT = 3A 90 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted. |
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