S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 110
S1F78100Y2A
Manufacturer Part Number
S1F78100Y2A
Description
High Precision Voltage Regulators
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.S1F78100Y2A.pdf
(258 pages)
- Current page: 110 of 258
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FUNCTIONAL DESCRIPTIONS
S1F78100Y Series is a fixed positive output type volt-
age regulator of series regulator system and is fitted
with an output control MOS transistor between the in-
put and output pins as shown in the figure below. The
voltage regulator feeds back voltages (V
with the built-in resistors R
S1F70000 Series
Technical Manual
(2pin)
(1pin)
V
V
DD
SS
1
and R
2
(Output control transistor)
connected between
REG
(Operational amplifier)
V
O
) divided
=
EPSON
R
1
R
+R
1
+
–
the output pin (V
them with the reference voltage (V
stable output voltage (V
age by controlling the gate voltage of the output control
transistor. The output voltage is fixed inside and is de-
cided with the following formula:
2
·V
REF
V
(V
REF
REG
)
O
pin) and the V
R2
R1
0
) not depending on input volt-
(3pin)
S1F78100Y Series
V
O
REF
SS
) and outputs the
pin to compare
3–3
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