參數(shù)資料
型號: PM6641TR
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, QCC48
封裝: 7 X 7 MM, 1 MM HEIGHT, LEAD FREE, VQFP-48
文件頁數(shù): 20/47頁
文件大?。?/td> 2254K
代理商: PM6641TR
PM6641
Device description
Doc ID 13510 Rev 3
27/47
7.5
Output voltage divider
PM6641 switching regulators are adjustable voltage converters.
If the feedback pin (VFB_1S8, VFB_1S5, VFB_1S05 respectively belonging to
VDDQ (1.8 V), 1.5 V, 1.05 V rail) is directly tied to the rail output capacitor the internal divider
with pre-fixed output voltage value is activated and the nominal output voltages are
selected.
If the feedback pin is connected to the output voltage divider central tap (as depicted in
)
Figure 30.
SW regulator with external divider
the PM6641 switching regulator automatically recognizes the external divider and the output
voltage is regulated to the following value:
Equation 5
Vout_1Sxx
VFB_1Sxx
R
1
R
2
V
8
.
0
1
R
Sxx
1
_
Vout
2
1
+
=
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