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參數(shù)資料
| 型號(hào)： | MAX882 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators(3.3V/可調(diào),250mA,具有維持方式,P溝道低壓差線性穩(wěn)壓器) |
| 中文描述： | 5V/3.3V或可調(diào)、低壓差、低IQ、200mA線性穩(wěn)壓器，具有待機(jī)模式 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 176K |
| 代理商： | MAX882 |
M
5V /3.3V or Adjustable, Low-Dropout,
Low I
Q
, 200mA Linear Regulators
10
______________________________________________________________________________________
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.
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
T
J
of +125°C, expect performance similar to M grade
specifications. For T
J
between +125°C and +150°C, the
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:
P(T
(V
IN
where P is derived from Figure 4.
I
T )
)100 C
OUT
V
OUT(MAX)
J
=
1.0
0.9
0.1cm
2
0.0155in
2
1.6
1.5
1.4
1.3
1.2
1.1
1cm
2
0.155in
2
10cm
2
1.55in
2
100cm
2
15.5in
2
M
COPPER GROUND PAD AREA
P
MAX883, V
= 5V
8-PIN SO PACKAGE
77.4cm
2
,
SINGLE-SIDED BOARD
1oz. COPPER
GLASS EPOXY,
T
J
= +125°C,
T
A
= +25°C, STILL AIR
250
200
150
100
50
0
M
SUPPLY VOLTAGE (V)
M
5
4
3
2
7
6
8
10
9
11
13
12
MAXIMUM POWER
DISSIPATION LIMIT
HIGH-
POWER
SOIC
PLASTIC DIP
CERAMIC DIP
M
T
MAXIMUM CURRENT
OPERATING
REGION AT
T
A
= +25°C
T
J
= +125°C
250
200
150
100
50
0
M
SUPPLY VOLTAGE (V)
M
5
4
7
6
8
10
9
11
13
12
MAXIMUM POWER
DISSIPATION LIMIT
HIGH-
POWER
SOIC
PLASTIC DIP
CERAMIC DIP
M
T
MAXIMUM CURRENT
OPERATING
REGION AT
T
A
= +25°C
T
J
= +125°C
Figure 4. Typical Maximum Power Dissipation vs. Ground
Pad Area
Figure 5a. Safe Operating Regions: MAX882/MAX884 Maximum
Output Current vs. Supply Voltage
Figure 5b. Safe Operating Regions: MAX883 Maximum Output
Current vs. Supply Voltage
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