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LT1790 Datasheet(PDF) 9 Page - Linear Technology |
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LT1790 Datasheet(HTML) 9 Page - Linear Technology |
9 / 24 page 9 LT1790 1790fa PARAMETER CONDITIONS MIN TYP MAX UNITS Output Voltage (Notes 3, 4) LT1790A 4.9975 5 5.0025 V –0.05 0.05 % LT1790B 4.995 5 5.005 V –0.10 0.10 % LT1790AC q 4.99400 5 5.00600 V q –0.120 0.120 % LT1790AI q 4.99125 5 5.00875 V q –0.175 0.175 % LT1790BC q 4.98625 5 5.01375 V q –0.275 0.275 % LT1790BI q 4.97938 5 5.02063 V q –0.4125 0.4125 % Output Voltage Temperature Coefficient (Note 5) TMIN ≤ TA ≤ TMAX LT1790A q 5 10 ppm/ °C LT1790B q 12 25 ppm/ °C Line Regulation 5.5V ≤ VIN ≤ 18V 50 170 ppm/V q 220 ppm/V Load Regulation (Note 6) IOUT Source = 5mA 80 160 ppm/mA q 250 ppm/mA IOUT Sink = 3mA 70 110 ppm/mA q 300 ppm/mA Dropout Voltage (Note 7) VIN – VOUT, ∆VOUT = 0.1% IOUT = 0mA 50 100 mV q 120 mV IOUT Source = 5mA q 450 mV IOUT Sink = 3mA q 250 mV Supply Current No Load 35 60 µA q 80 µA Minimum Operating Current— VOUT = – 5V, 0.1% 100 125 µA Negative Output (See Figure 7) Turn-On Time CLOAD = 1µF 700 µs Output Noise (Note 8) 0.1Hz ≤ f ≤ 10Hz 80 µVP-P 10Hz ≤ f ≤ 1kHz 118 µVRMS Long-Term Drift of Output Voltage (Note 9) 50 ppm/ √kHr Hysteresis (Note 10) ∆T = 0°C to 70°C q 40 ppm ∆T = –40°C to 85°C q 100 ppm The q denotes specifications that apply over the specified temperature range, otherwise specifications are at TA = 25°C. CL = 1µF and VIN = 5.5V, unless otherwise noted. 5V ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: The LT1790 is guaranteed functional over the operating temperature range of – 40 °C to 125°C. The LT1790-1.25 at 125°C is typically less than 2% above the nominal voltage. The other voltage options are typically less than 0.25% above their nominal voltage. Note 3: If the part is stored outside of the specified temperature range, the output voltage may shift due to hysteresis. Note 4: ESD (Electrostatic Discharge) sensitive device. Extensive use of ESD protection devices are used internal to the LT1790, however, high electrostatic discharge can damage or degrade the device. Use proper ESD handling precautions. Note 5: Temperature coefficient is measured by dividing the change in output voltage by the specified temperature range. Incremental slope is also measured at 25 °C. Note 6: Load regulation is measured on a pulse basis from no load to the specified load current. Output changes due to die temperature change must be taken into account separately. Note 7: Excludes load regulation errors. Note 8: Peak-to-peak noise is measured with a single pole highpass filter at 0.1Hz and a 2-pole lowpass filter at 10Hz. The unit is enclosed in a still air environment to eliminate thermocouple effects on the leads. The test time is 10 seconds. Integrated RMS noise is measured from 10Hz to 1kHz with the HP3561A analyzer. |
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