S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 69

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

S1F76540 Series
Setup:
Setup example:
First, determine the total resistance of division resistors R1 and R2. If the current consumption is assumed to be 20
If the reference voltage is -1.5 V, the division resistance ratio can be obtained from equation (1) as follows:
Therefore, R1 and R2 are:
2–26
A, the total resistance can be obtained from equation (2) as follows:
• Relationship between V
• Current consumption of division resistors
• To output V
R1 + R2 = 12V 20 A = 900 k
(R1 + R2) / R2 = (–18 V) (–1.5 V) = 12
R1 = 75 k
R2 = 825 k
V
I
REG
REG
REG
=
=
R1 + R2
R1 + R2
| V
= –18 V by four-time boosting if V
R1
REG
REG
|
Figure 2.5 V
and reference voltage
(Reference voltage)
R1
R2
REG
setup and mounting notes
EPSON
I
1
2
3
4
5
6
7
8
= –5 V and V
V
V
V
RV
V
FC
TC1
TC2
O
RI
REG
DD
P
P
C2N
C3N
C1N
C2P
C1P
OFF1
OFF2
O
V
= –20 V
I
16
15
14
13
12
11
10
9
• • • • Equation (1)
• • • • Equation (2)
Technical Manual
S1F70000 Series