S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 219

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

S1F77200Y Series
PIN DESCRIPTIONS
PIN ASSIGNMENTS
FUNCTIONAL DESCRIPTIONS
The S1F77200Y series has the circuit configuration as
shown in the figure below. For the detection, divided
potential (V
power supply and the reference voltage (V
ated on the IC are entered to the voltage comparator.
Since the voltage comparator is designed to detect a tar-
get voltage even when potential difference between
V
comparator may not fail due to noise on the power sup-
ply and such. In the example shown in the figure below,
6–4
REG
and Vref minute, hysteresis is added so that the
REG
) across the resistors inserted across the
(2pin)
(3pin)
V
V
DD
SS
Pin No. Pin name
R1
R2
R3
1
2
3
T
OUT
V
V
T
DD
SS
REF
(V
REG
) gener-
)
V
1
REF
Voltage detection output pin
Input voltage pin (positive side)
Input voltage pin (negative side)
SOT89-3pin
EPSON
+
—
2
detection voltage (V
relief voltage (V
set based the following formula.
Detection voltage: V
Relief voltage:
Description
3
REL
V
) for the increased input voltage are
DET
DET
REL
) for the input voltage drop and
=
=
R1+R2+R3
R1+R2+R3
R2+R3
(1pin)
OUT
R3
Technical Manual
S1F70000 Series
• V
• V
REF
REF