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TL-SCSI285 Datasheet(PDF) 2 Page - Texas Instruments |
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TL-SCSI285 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 12 page TL-SCSI285 FIXED-VOLTAGE REGULATORS FOR SCSI ACTIVE TERMINATION SLVS065F – NOVEMBER 1991 – REVISED JULY 1999 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating virtual junction temperature range (unless otherwise noted)† Continuous input voltage, VI 7.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating virtual junction temperature range, TJ –55 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA (see Notes 1 and 2): KC package 22 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . PW package 83 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: KC or PW package 260 °C . . . . . . . . . . . . . Storage temperature range, Tstg –65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability. Due to variations in individual device electrical characteristics and thermal resistance, the built-in thermal overload protection may be activated at power levels slightly above or below the rated dissipation. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. recommended operating conditions TL-SCSI285 UNIT MIN MAX UNIT Input voltage, VI TJ = 25°C V Input voltage, VI TJ = 0°C to 125°C 3.55 5.5 V Output current IO KC package 0 620 mA Output current, IO PW package 0 500 mA Operating virtual junction temperature range, TJ 0 125 °C electrical characteristics, VI = 4.5 V, IO = 500 mA, TJ = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS‡ TL-SCSI285KC UNIT PARAMETER TEST CONDITIONS‡ MIN TYP MAX UNIT Output voltage IO = 20 mA to 500 mA, VI = 3.55 V to 5.5 V, TJ = 25°C 2.82 2.85 2.88 V Output voltage IO = 500 mA to 620 mA, VI = 3.65 V to 5.5 V, TJ = 0 to 125°C 2.79 2.91 V Input regulation VI = 3.55 V to 5.5 V 5 15 mV Ripple rejection f = 120 Hz, Vripple = 1 VO(PP) –62 dB Output regulation IO = 20 mA to 620 mA 5 30 mV Output regulation IO = 20 mA to 500 mA 5 30 mV Output noise voltage f = 10 Hz to 100 kHz 500 µV Dropout voltage IO = 500 mA 0.7 V Dropout voltage IO = 620 mA 0.8 V IO = 0 2 5 Bias current IO = 27 mA, equivalent 1 line asserted 3 6 mA Bias current IO = 500 mA, equivalent 18 lines asserted (8-bit) 26 49 mA IO = 620 mA 37 62 ‡ Pulse-testing techniques are used to maintain the virtual junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. All characteristics are measured with a 0.1- µF capacitor across the input and a 22.0-µF tantalum capacitor with equivalent series resistance of 1.5 Ω on the output. |
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