LM1085
Electrical Characteristics (Continued)
Typicals and limits appearing in normal type apply for TJ = 25˚C. Limits appearing in Boldface type apply over the entire junc- tion temperature range for operation.
Symbol | Parameter | Conditions | Min | Typ | Max | Units | |
(Note 6) | (Note 5) | (Note 6) | |||||
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ILIMIT | Current Limit |
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| VIN−VOUT = 5V | 3.2 | 5.5 |
| A | |
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| VIN−VOUT = 25V | 0.2 | 0.5 |
| A | |
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| VIN = 8V | 3.2 | 5.5 |
| A | |
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| VIN = 10V | 3.2 | 5.5 |
| A | |
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| VIN = 17V | 3.2 | 5.5 |
| A | |
| Minimum Load |
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| Current (Note 10) | VIN −VOUT = 25V |
| 5.0 | 10.0 | mA | |
| Quiescent Current |
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| VIN ≤ 18V |
| 5.0 | 10.0 | mA | |
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| VIN ≤ 20V |
| 5.0 | 10.0 | mA | |
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| VIN ≤ 25V |
| 5.0 | 10.0 | mA | |
| Thermal Regulation | TA = 25˚C, 30ms Pulse |
| .004 | 0.02 | %/W | |
| Ripple Rejection | fRIPPLE = 120Hz, COUT = 25µF Tantalum, IOUT = 3A |
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| 60 | 75 |
| dB | ||
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| 60 | 72 |
| dB | ||
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| 60 | 68 |
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| 54 | 60 |
| dB | ||
| Adjust Pin Current | LM1085 |
| 55 | 120 | µA | |
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| Adjust Pin Current | 10mA ≤ IOUT ≤ IFULL LOAD, 1.5V ≤ VIN−VOUT ≤ 25V |
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| Change |
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| 0.2 | 5 | µA | |
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| Temperature |
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| Stability |
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| Long Term Stability | TA=125˚C, 1000Hrs |
| 0.3 | 1.0 | % | |
| RMS Output Noise | 10Hz ≤ f≤ 10kHz |
| 0.003 |
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| (% of VOUT) |
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| Thermal Resistance |
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| 0.7/3.0 | ˚C/W | ||
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| 0.7/3.0 | ˚C/W | |||
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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics.
Note 2: Power dissipation is kept in a safe range by current limiting circuitry. Refer to Overload Recovery in Application Notes.
Note 3: The maximum power dissipation is a function of TJ(max) , θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD =
Note 4: For testing purposes, ESD was applied using human body model, 1.5kΩ in series with 100pF.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: IFULL LOAD is defined in the current limit curves. The IFULL LOAD Curve defines the current limit as a function of
Note 8: Load and line regulation are measured at constant junction temperature, and are guaranteed up to the maximum power dissipation of 30W. Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.
Note 9: Dropout voltage is specified over the full output current range of the device.
Note 10: The minimum output current required to maintain regulation.
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