S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 76

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

Larger Time Boosting Using Diodes
The S1F76540 can be configured to have the five-time
or larger voltage boosting and regulation by adding ex-
ternal diodes. As the booster output impedance in-
creases due to the diode forward voltage drop (V
diodes having a smaller V
S1F70000 Series
Technical Manual
Setup conditions of Figure 2.11
• Internal clock : ON (Low Output mode)
• Booster circuit : ON
• Regulator
Power-off procedure
• In Figure 2.11, when the P
• To set the V
Application in other setup conditions
1 When used in the High Output mode
2 When changing the temperature coefficient (C
the first and second stages. However, the regulator at the second stage does not stop. Therefore, the voltage that
is approximately V
• Connect the FC pin of the first-stage S1F76540 to the V
• Change the TC1 and TC2 pin setup by following the definition of Table 2.7.
V
V
REG
DD
REG
V
First stage
: OFF
pin to high-impedance state, set both P
Figure 2.12 Wiring example for 6-time boosting using diodes
I
I
appears at V
F
are recommended to use.
R1
OFF2
+
C
pin of the first-stage S1F76540 is set to low (V
I
REG
C
R2
+
REG
pin during |V
F
), the
T
EPSON
1
2
3
4
5
6
7
8
)
REG
V
V
V
RV
V
FC
TC1
TC2
O
RI
REG
DD
OFF1
| > |V
Figure 2.12 gives a wiring example of 6-time booster
and regulator that use two diodes. The wiring between
V
potential relationship.
O
• Internal clock : OFF
• Booster circuit : ON
• Regulator
and V
I
and P
I
pin.
| setup.
P
P
C2N
C3N
C1N
C2P
C1P
OFF1
OFF2
RI
OFF2
V
I
must be minimal. Figure 2.13 provides the
16
15
14
13
12
11
10
9
pins to low at the first and second stages.
+
C1
Second stage
: ON (if C
C2
+
I
+
), voltage boosting is stopped at
C4
+
C3
T
D1
= –0.04%/ C)
S1F76540 Series
C5
+
D2
C
+
O
V
2–33
O
'