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TL-SCSI285Y bảng dữ liệu(HTML) 2 Page - Texas Instruments

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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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