MIC2563A(1997) Ver la hoja de datos (PDF) - Micrel
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MIC2563A Datasheet PDF : 10 Pages
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MIC2563A
Electrical Characteristics (continued)
Symbol
Parameter
Conditions
THERMAL SHUTDOWN
TSD
Thermal Shutdown Temperature
Micrel
Min
Typ
Max
Units
130
°C
NOTE 1: Functional operation above the absolute maximum stress ratings is not implied.
NOTE 2: Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to
prevent damage from static discharge.
NOTE 3:
NOTE 4:
NOTE 5:
R
L
=
100Ω
connected
to
ground.
RL = 10Ω connected to ground.
Delay from commanding Hi Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown
conditions.
NOTE 6: The MIC2563A uses VCC3 IN for operation. For single 5V supply systems, connect 5V to both VCC3 IN and VCC5IN. See Applica-
tions Information for further details.
NOTE 7: VPP IN is not required for operation.
NOTE 8: VPP IN must be either high impedance or greater than or approximately equal to the highest voltage VCC in the system. For
example, if both 3.3V and 5V are connected to the MIC2563A, VPP IN must be either 5V, 12V, or high impedance.
2
A
B
VPP
Enable
0
VPP to 3.3V VPP to 12V
C
DE
VPP to 3.3V
VPP
OFF
VPP to 5V
F
VPP to 12V
t7
t9
t8
12V
G
H
J
K
VPP to 5V
VPP OFF VPP to 12V
VPP OFF
t13
t10
t6
t16
VPP
Output
t4
t1
5V
3.3V
t2
t11
t5
t14
t3
t15
t12
0
Figure 1. MIC2563A VPP Timing Diagram. VPP Enable is shown generically: refer to the timing tables (below). At
time “A” VPP = 3.3V is selected. At B, VPP is set to 12V. At C, VPP = 3.3V (from 12V). At D, VPP is disabled. At E, VPP is
programmed to 5V. At F, VPP is set to 12V. At G, VPP is programmed to 5V. At H, VPP is disabled. At J, VPP is set to
12V. And at K, VPP is again disabled. RL = 100Ω for all measurements. Load capacitance is negligible.
1997
2-51
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