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参数资料
| 型号： | MAS9168A6GB06 |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 3 V FIXED POSITIVE LDO REGULATOR, PDSO5 |
| 封装： | LEAD FREE, TSOT-5 |
| 文件页数： | 10/12页 |
| 文件大小： | 348K |
| 代理商： | MAS9168A6GB06 |
DA9168.002
31 December 2004
7 (12)
APPLICATION INFORMATION
Auto-Discharge Function
MAS9168 does not feature an auto-discharge
function. The voltage in VOUT pin, when MAS9168
is turned off, depends on the load circuits leakage:
if the load has big leakage current, VOUT rapidly
drops to the value 0 V, but if the leakage current is
non-existing, VOUT pin stays in VOUT(NOM) value.
Calculating Maximum Power Dissipation
Maximum power dissipation of the package may
limit output current or input voltage, which can be
used, especially with the combination of low output
voltage and high input voltage.
The power dissipation can be calculated by using
the formula:
()
GND
IN
OUT
IN
d
I
*
V
I
*
V
P
+
=
It shall not exceed the maximum power dissipation,
allowed by the package:
JA
A
JMAX
dMAX
R
T
P
=
where TJMAX is maximum junction temperature
(TJMAX = 125°C), TA is ambient temperature and RJA
is junction-to-ambient thermal resistance of the
package.
When assumed that:
TA = +55°C, VOUT = 1.8 V, VIN = 5.0 V and used
package is TSOT-5 the equation yields:
W
0.338
C/W
207
C
55
C
125
PdMAX
=
°
°
=
from which can be calculated:
mA
106
V
P
I
OUT
IN
dMAX
OUTMAX
=
=
VIN * IGND is negligible and can be omitted.
Consequently, it can be seen that under these
conditions the average output current should not
exceed 106 mA.
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