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LTC1437A 数据表(PDF) 4 Page - Linear Technology |
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LTC1437A 数据表(HTML) 4 Page - Linear Technology |
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4 / 28 page  4 LTC1436A LTC1436-PLL-A/LTC1437A 14367afb ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Low-Battery Comparator VSATLBO LBO Saturation Voltage ILBO = 1.6mA, VLBI = 1.1V 0.6 1 V ILLBO LBO Leakage VLBO = 12V, VLBI = 1.4V ● 0.01 1 µA VTHLBI LBI Trip Voltage High to Low Transition on LBO ● 1.16 1.19 1.22 V IINLBI LBI Input Current VLBI = 1.19V ● 150 nA VHYSLBO LBO Hysteresis 20 mV Auxiliary Regulator/Comparator IAUXDR AUXDR Current VEXTVCC = 0V Max Current Sinking Capability VAUXDR = 4V, VAUXFB = 1.0V, VAUXON = 5V 10 15 mA Control Current VAUXDR = 5V, VAUXFB = 1.5V, VAUXON = 5V 1 5 µA Leakage When Off VAUXDR = 24V, VAUXFB = 1.5V, VAUXON = 0V 0.01 1 µA IIN AUXFB AUXFB Input Current VAUXFB = 1.19V, VAUXON = 5V 0.01 1 µA IIN AUXON AUXON Input Current VAUXON = 5V 0.01 1 µA VTH AUXON AUXON Trip Voltage VAUXDR = 4V, VAUXFB = 1.0V 1.0 1.19 1.4 V VSAT AUXDR AUXDR Saturation Voltage IAUXDR = 1.6mA, VAUXFB = 1.0V, VAUXON = 5V 0.4 0.8 V VAUXFB AUXFB Voltage VAUXON = 5V, 11V < VAUXDR < 24V (Note 5) ● 11.5 12 12.5 V VAUXON = 5V, 3V < VAUXDR < 7V (Note 5) ● 1.14 1.19 1.24 V VTH AUXDR AUXFB Divider Disconnect Voltage VAUXON = 5V (Note 6), Ramping Negative 7.5 8.5 9.5 V fOSC (kHz) = + –1 8.4(108) COSC (pF) + 11 () 1 ICHG ()1 IDIS Note 6: The Auxiliary Regulator is tested in a feedback loop which servos VAUXFB to the balance point for the error amplifier. For applications with VAUXDR > 9.5V, VAUXFB uses an internal resistive divider. See Applications Information. Note 7: The minimum on-time test condition corresponds to an inductor peak-to-peak ripple current ≥ 40% of IMAX (see Minimum On-Time Considerations in the Applications Information section). Note 8: The LTC1436AE is guaranteed to meet performance specifications from 0 °C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: LTC1436ACGN/LTC1436ACGN-PLL/LTC1436AEGN/LTC1436AIGN/ LTC1436AIGN-PLL: TJ = TA + (PD)(110 °C/W) LTC1437ACG/LTC1437AIG: TJ = TA + (PD)(95 °C/W) Note 3: The LTC1436A/LTC1437A are tested in a feedback loop which servos VOSENSE to the balance point for the error amplifier (VITH = 1.19V). Note 4: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information section. Note 5: Oscillator frequency is tested by measuring the COSC charge and discharge currents and applying the formula: The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS = 5V unless otherwise noted. |
类似零件编号 - LTC1437A_15 |
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类似说明 - LTC1437A_15 |
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