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LTC3734EUH Datasheet(PDF) 4 Page - Linear Technology |
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LTC3734EUH Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  4 LTC3734 3734f ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VPVCC = VSVCC = 5V, VRUN/SS = 5V unless otherwise noted. Note 4: The LTC3734 is tested in a feedback loop that servos VITH to a specified voltage and measures the resultant VFB. 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 minimum on-time condition corresponds to the on inductor peak-to-peak ripple current ≥40% IMAX (see Minimum On-Time Considerations in the Applications Information section). Note 8: The ATTENERR specification is in addition to the output voltage accuracy specified at VID code = 010110. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LTC3734E 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 3: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: LTC3734EUH: TJ = TA + (PD • 34°C/W) TYPICAL PERFOR A CE CHARACTERISTICS Active Mode Efficiency (VID = 1.186V, PSI = 0) (Figure 9) Deeper Sleep Mode Efficiency (Figure 9) Efficiency vs Input Voltage (Figure 9) INPUT VOLTAGE (V) 5 70 80 3734 G03 60 50 10 15 20 100 90 IOUT = 20A VOUT = 1.6V IOUT (A) 0 8 3735 GO1 2 4 6 10 100 90 80 70 60 VIN = 7.5V VIN = 20V 90 80 70 60 IOUT (A) 0.01 3734 G02 0.1 1 10 VIN = 7.5V VIN = 20V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Operational Amp IB Input Bias Current 15 200 nA VOS Input Offset Voltage Magnitude VOA + = VOA– 1.2V, IOUT = 1mA 0.8 5 mV CM Common Mode Input Voltage Range 0 PVCC – 1.4 V CMRR Common Mode Rejection Ratio IOUT = 1mA 46 70 dB ICL Output Source Current 10 35 mA AVOL Open-Loop DC Gain IOUT = 1mA 30 V/mV GBP Gain-Bandwidth Product IOUT = 1mA 2 MHz SR Slew Rate RL = 2k 5 V/ μs VO(MAX) Maximum High Output Voltage IOUT = 1mA PVCC – 1.2PVCC – 0.9 V |
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