S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 77

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

S1F76540 Series
2–34
Setup conditions of Figure 2.12
• Internal clock : ON (Low Output mode)
• Booster circuit : ON
• Regulator
Power-off procedure
• Set the P
Output voltages
• When diodes are used for voltage boosting, the characteristics of diodes directly affect on the voltage boosting
Notes
1 Input and output current conditions
2 Input and output voltage conditions
Application in other setup conditions
1 When used in the High Output mode
2 When changing the temperature coefficient (C
characteristics. The forward voltage drop (V
of Figure 2.12 uses two diodes, the drop of “V
booster output voltage is expressed by equation (5).
To increase the |V
To satisfy the input and output current ratings, limit the total current does not exceed the rated input current.
The total current means the total boost time multiplied by the output load current. The example of Figure 2.12
has the maximum load current of 13.3 mA ( = 80 mA divided by 6).
To satisfy the input and output voltage ratings, take care not to violate the electric potential relationship of
higher time boosting using diodes. The example of Figure 2.12 must have the “V
voltage conditions during 6-time boosting (see Table 2.3).
Connect the FC pin to the V
Change the TC1 and TC2 pin setup by following the definition of Table 2.7.
| V
O
' | = 6
OFF1
Figure 2.13 Potential relationship during 6-time boosting using diodes
pin to low (V
: ON (if C
| V
O
I
'| value, use the diodes having a smaller V
| – 2
V
V
T
DD
V
I
V
O
= –0.04%/ C)
) to turn off all circuits.
I
F
I
pin.
4V
V
I
I
6V
F
) of diodes can reduce the booster output voltage. As the example
F
I
” voltage multiplied by two occurs as shown in Figure 2.13. The
T
EPSON
)
2 V
F
F
.
6V
I
– (2 V
F
)
V
O
'
• • • • Equation (5)
I
” that can satisfy the input
Technical Manual
S1F70000 Series