參數(shù)資料
型號(hào): VNL5050N3TR-E
廠(chǎng)商: STMICROELECTRONICS
元件分類(lèi): 電源管理
英文描述: POWER SUPPLY SUPPORT CKT, PDSO3
封裝: ROHS COMPLIANT, SOT-223, 4 PIN
文件頁(yè)數(shù): 9/32頁(yè)
文件大小: 490K
代理商: VNL5050N3TR-E
VNL5050N3-E / VNL5050S5-E
Electrical characteristics
Doc ID 15917 Rev 4
3.2
MCU I/O protection
ST suggests to insert a resistor (Rprot) in line to prevent the microcontroller I/O pins from
latching up(a). The value of these resistors is a compromise between the leakage current of
microcontroller and the current required by the LSD I/Os (input levels compatibility) with the
latch-up limit of microcontroller I/Os:
Equation 1
Let:
Ilatchup > 20 mA
VOHC > 4.5 V
35
Ω ≤ R
prot ≤ 100 KΩ
Then, the recommended value is Rprot = 10 KΩ
Figure 18 shows the turn-off current drawn during the demagnetization.
Figure 18. Maximum demagnetization energy(1)
1.
The voltage supply is VCC = 13.5 V
a.
In case of negative transient on the drain pin
(
)
max
IH
C
OH
prot
latchup
I
V
R
I
.
μ
7
0
I (A)
1
10
100
110
100
L (mH)
A: VNL5050x - Single pulse
B: Repetitive pulse T
J = 100 °C
C: Repetitive pulse T
J = 125 °C
A
B
C
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