S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 88

• Manufacturer Part Number: S1F78100Y2A
• Description: High Precision Voltage Regulators
• Manufacturer: Epson Electronics America, Inc.

Temperature Gradient Selection Circuit
Table 5-1.
Note 1 :
Note 2 :
Note 3 :
Note 4 :
Note 5 :
S1F70000 Series
Technical Manual
(Note 1)
1(V
1(V
1(V
1(V
0(V
0(V
0(V
0(V
S1F76640 can provide three kinds of temperature gradients suitable for driving LCD to V
Example :When C
P
DD
DD
DD
DD
SS
SS
SS
SS
C
When the temperature rises 1 ˚C, the V
OFF
When Ta is 25˚C, the V
When V
T
V
)
)
)
)
)
)
)
)
=
V
REG
V
REG
Please note that potentials on the High side are different between the P
The formula below is used to define temperature gradient C
At power off time (V
V
When this mode is selected at a series connection, the first stage clock can drive the next stage IC and
this mode is effective for reducing the power consumption of the next stage IC. (See Figure 8.4)
Select this mode for boosting only. And the current consumption can be reduced.
REG
/ T=C
DD
Low(V
Low(V
High(V
High(V
Low(V
Low(V
High(V
High(V
REG
(Note 1)
+0.5V.
(50˚C) – V
T=–60mV/˚C
TC2
is –10V at 25˚C, the formula below is formed:
50˚C–0˚C
T
SS
SS
O
O
SS
SS
O
O
T
)
)
)
)
=–0.6%/˚C is selected,
) Low(V
) High(V
) Low(V
) High(V
V
REG
Low(V
High(V
Low(V
High(V
REG
Table 5-1 Temperature Gradient Adaptation Table
(Note 1)
REG
(25˚C) =–0.6 10
TC1
(0˚C)
REG
SS
O
SS
O
SS
O
SS
O
output becomes –8V at 25˚C.
)
)
)
)
)
)
)
)
output : OFF, CR oscillator : OFF), the potential of the V
Gradient C
Temperature
–0.40%/ ˚C
–0.25%/ ˚C
–0.55%/ ˚C
–0.55%/ ˚C
V
REG
REG
—
—
—
—
1
(25˚C)
T
(Note 2)
–2
value reduces by 48mV.
EPSON
8=–48mV/˚C
OFF(Hi-Z)(Note 3)
OFF(Hi-Z)(Note 3)
OFF(Hi-Z)(Note 3)
100 (%/˚C)
OFF(Hi-Z)
Output
V
ON
ON
ON
ON
REG
T
:
Oscillator
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
CR
pin and TC2/TC1 pin.
Series connection (Note 4)
Boosting only (Note 5)
S1F76640 Series
REG
O
Remarks
output as shown
output is about
—
—
—
—
—
—
—
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