5 V/3 .3 V o r Ad ju s t a b le , Lo w -Dro p o u t ,
Lo w I , 2 0 0 m A Lin e a r Re g u la t o rs
Q
1.6
1.5
250
200
MAX883, V
= 5V
MAXIMUM POWER
DISSIPATION LIMIT
OUT
8-PIN SO PACKAGE
MAXIMUM CURRENT
PLASTIC DIP
77.4cm2,
SINGLE-SIDED BOARD
1oz. COPPER
GLASS EPOXY,
1.4
1.3
1.2
1.1
1.0
0.9
HIGH-
POWER
SOIC
150
100
50
T = +125°C,
J
T
A
= +25°C, STILL AIR
CERAMIC DIP
OPERATING
REGION AT
= +25°C
T
A
T = +125°C
J
0
0.1cm2
1cm2
10cm2
1.55in2
100cm2
15.5in2
2
3
4
5
6
7
8
9
10 11 12 13
0.0155in2
0.155in2
SUPPLY VOLTAGE (V)
COPPER GROUND PAD AREA
Figure 4. Typical Maximum Power Dissipation vs. Ground
Pad Area
Figure 5a. Safe Operating Regions: MAX882/MAX884 Maximum
Output Current vs. Supply Voltage
The GND pins of the MAX882/MAX883/MAX884 SOIC
package perform the dual function of providing an elect-
rical connection to ground and channeling heat away. Con-
nect all GND pins to ground using a large pad or ground
plane. Where this is impossible, place a copper plane on an
adjacent layer. For a given power dissipation, the pad
should exceed the associated dimensions in Figure 4.
23/MAX84
250
MAXIMUM POWER
DISSIPATION LIMIT
MAXIMUM CURRENT
200
HIGH-
POWER
SOIC
Figure 4 assumes the IC is in an 8-pin small-outline pack-
age that has a maximum junction temperature of +125°C
and is soldered directly to the pad; it also has a +25°C
ambient air temperature and no other heat sources. Use
larger pad sizes for other packages, lower junction tem-
peratures, higher ambient temperatures, or conditions
where the IC is not soldered directly to the heat-sinking
ground pad. When operating C and E grade parts up to a
150
PLASTIC DIP
100
CERAMIC DIP
OPERATING
50
REGION AT
T
= +25°C
A
J
T = +125°C
0
T
J
of +125°C, expect performance similar to M grade
4
5
6
7
8
9
10 11 12 13
specifications. For T between +125°C and +150°C, the
J
SUPPLY VOLTAGE (V)
output voltage may drift more.
The MAX882/MAX883/MAX884 can regulate currents up
to 250mA and operate with input voltages up to 11.5V, but
not simultaneously. High output currents can only be sus-
tained when input-output differential voltages are small, as
shown in Figure 5. Maximum power dissipation depends
on packaging, temperature, and air flow. The maximum
output current is as follows:
Figure 5b. Safe Operating Regions: MAX883 Maximum Output
Current vs. Supply Voltage
P(T − T )
J
A
I
=
OUT(MAX)
(V − V
)100°C
IN
OUT
where P is derived from Figure 4.
10 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
