Datasheet

 
 
SLVS391B − OCTOBER 2001 − REVISED FEBRUARY 2002
3
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absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
Voltage range at VIN, EN
, PG to GND (see Note 1) −0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range at OUT, FB to GND −0.3 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range at C1F+, C1F−, C2F+, C2F− to GND −0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current at OUT 300 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−55°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum junction temperature, T
J
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.
NOTE 1: The voltage at EN, and PG can exceed VIN up to the maximum rated voltage without increasing the leakage current drawn by these
mode select inputs.
DISSIPATION RATING TABLE
PACKAGE
T
A
≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE T
A
= 25°C
T
A
= 70°C
POWER RATING
T
A
= 85°C
POWER RATING
DGS 555 mW 5.56 mW/°C 305 mW 221 mW
NOTE: The thermal resistance junction to ambient of the DGS package when soldered on a PCB is R
θJA
≈ 180°C/W.
recommended operating conditions
MIN NOM MAX UNIT
Input voltage range at VIN, V
I
1.8 6.5 V
Output current range at OUT, I
O
250 mA
Input capacitor, C
i
2.2 µF
Flying capacitors, C1F, C2F 1 µF
Output capacitor, C
o
for I
O
≤ 150 mA 4.7 µF
Output capacitor, C
o
for 150 mA < I
O
< 250 mA 22 µF
Operating junction temperature, T
J
−40 125 °C
RECOMMENDED CAPACITOR VALUES
I
O, max
[mA]
C
i
[µF]
C
(xF)
[µF]
C
o
[µF]
50 2.2 0.22 4.7
150 4.7 1 10
250 4.7 1 22