MIC2563A
Micrel
Electrical Characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
THERMAL SHUTDOWN
T
SD
Thermal Shutdown Temperature
130
°C
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
NOTE 5:
NOTE 6:
NOTE 7:
NOTE 8:
Functional operation above the absolute maximum stress ratings is not implied.
Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to
prevent damage from static discharge.
R
L
= 100Ω connected to ground.
R
L
= 10Ω connected to ground.
Delay from commanding Hi Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown
conditions.
The MIC2563A uses V
CC3 IN
for operation. For single 5V supply systems, connect 5V to both V
CC3 IN
and V
CC5IN
. See Applica-
tions Information for further details.
V
PP IN
is not required for operation.
V
PP IN
must be either high impedance or greater than or approximately equal to the highest voltage V
CC
in the system. For
example, if both 3.3V and 5V are connected to the MIC2563A, V
PP IN
must be either 5V, 12V, or high impedance.
2
A
VPP
Enable
0
B
C
D
E
F
G
H
J
K
VPP to 3.3V
VPP to 12V
VPP to 3.3V
VPP
OFF
VPP to 5V
VPP to 12V
VPP to 5V
VPP OFF
VPP to 12V
VPP OFF
t13
t10
t7
t9
t8
t6
t16
12V
VPP
Output
t1
t3
t2
t4
t11
t5
t15
t12
5V
t14
3.3V
0
Figure 1. MIC2563A V
PP
Timing Diagram. V
PP
Enable is shown generically: refer to the timing tables (below). At
time “A” V
PP
= 3.3V is selected. At B, V
PP
is set to 12V. At C, V
PP
= 3.3V (from 12V). At D, V
PP
is disabled. At E, V
PP
is
programmed to 5V. At F, V
PP
is set to 12V. At G, V
PP
is programmed to 5V. At H, V
PP
is disabled. At J, V
PP
is set to
12V. And at K, V
PP
is again disabled. R
L
= 100
Ω
for all measurements. Load capacitance is negligible.
1997
2-51
MICREL [ MICREL SEMICONDUCTOR ]
