MAX6819 데이터 시트보기 (PDF) - Maxim Integrated
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MAX6819 Datasheet PDF : 8 Pages
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SOT23 Power-Supply Sequencers
VEN/VSETV
O
VCC2 + 5.5V
GATE
O
tON
90%
10%
tDELAY
Figure 3. Timing Diagram
5(V) PRIMARY VOLTAGE SUPPLY
3.3(V) SECONDARY VOLTAGE SUPPLY
1.8(V) THIRD VOLTAGE SUPPLY
50%
10%
tOFF
VCC2
GATE
MAX6819
MAX6820
VCC1
GND
R1
SETV SETD/EN
R2
VCC2
GATE
MAX6819
MAX6820
VCC1
GND
R3
SETV SETD/EN
R4
MULTISUPPLY
BOARD OR µP
Figure 4. Sequencing Three Power Supplies
20
18
VCC1 = 5V
VCC2 = 0
16
SETD = FLOATING
14
12
10
8
6
4
GATE DISABLED ABOVE CURVE
2
0
0.01
0.1
1
SETV THRESHOLD OVERDRIVE, VTH - VSETV (V)
Figure 5. Maximum Transient Duration vs. SETV Threshold
in Overdrive
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