參數(shù)資料
型號: PM6641
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): 26/47頁
文件大?。?/td> 2254K
代理商: PM6641
Device description
PM6641
32/47
Doc ID 13510 Rev 3
where VREF = 0.9V is the constant voltage forced by CSNS pin, RCSNS [Ω] is the resistor
connected between CSNS and AGND,
α is the coefficient that collects the MOS current
sensing scaling factor and other design parameters and ICL is the peak current limit [A].
The following table resumes values for all the switching regulators.
The following graph is a plot of the switching regulators peak current limit, increasing the
RCSNS resistor:
Figure 33.
SW regulators peak current limit
From the previous plot and table it’s clear that the three regulators peak current limits are
scaled; by changing the RCSNS external resistor the three peak current limits all change.
Table 11.
Typical SW regulators values
SW regulator
α
1.8V
333x10e3
1.5V
222x10e3
1.05V
278x10e3
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
40
60
80
100
120
140
160
180
Rcsns [kOhm]
Cu
rr
e
n
tL
im
it
[
A
]
CL_1V8
CL_1V5
CL_1V05
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
40
60
80
100
120
140
160
180
Rcsns [kOhm]
Cu
rr
e
n
tL
im
it
[
A
]
CL_1V8
CL_1V5
CL_1V05
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