LTC1643HCGN View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1643HCGN Datasheet PDF : 16 Pages
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LTC1643L/LTC1643L-1/LTC1643H
APPLICATIONS INFORMATION
ON
10V/DIV
ON
10V/DIV
TIMER
10V/DIV
TIMER
10V/DIV
GATE
10V/DIV
12VOUT
5V/DIV
3VOUT
5V/DIV
5VOUT
5V/DIV
VEEOUT
5V/DIV
GATE
10V/DIV
12VOUT
5V/DIV
5VOUT
5V/DIV
3VOUT
5V/DIV
VEEOUT
5V/DIV
FAULT
10V/DIV
PWRGD
10V/DIV
FAULT
10V/DIV
PWRGD
10V/DIV
20ms/DIV
1643 F04
Figure 4. Power-Up into a Short on 3.3V Output
20ms/DIV
1643 F05
Figure 5. Short Circuit on 5V Followed by Circuit Breaker Reset
5V
R2
Q2
1 0.005Ω 2 IRF7413
3.3V
3
4
C2
1µF
R3 R5
20Ω 10Ω
R1
Q1
1 0.007Ω 2 IRF7413
3
4
R4 R6
20Ω 10Ω
C3
1µF
R7
100Ω
9
10
11
3
13
12
3VIN 3VSENSE GATE 3VOUT 5VIN 5VSENSE
14
5VOUT
5V
5A
3.3V
7.6A
C1
0.047µF
LTC1643L
1643 F06
Figure 6. Delay in the Current Limit Loop
12
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