S1F78100Y2A Epson Electronics America, Inc., S1F78100Y2A Datasheet - Page 240

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

Appendix
PARAMETER SUMMARY
7–2
The following figure shows a thermal design
model which can be used to determine heatsink
capacity.
Symbol
I
I
f
I
I
I
f
f
OPR1
C
C
C
CT
OSC
DDO
I
I
MAX
I
C
C
FT
BSQ
DDS
I
CLK
max
I
C
DD
I
LKI
I
OH
OL
IH
IL
O
F8
Tn
D
G
n
I
source
Heat
Drain capacitance
Field slew capacitance
Gate capacitance
Input capacitance
Capacitance
Crosstalk
Temperature gradient
Clock frequency
Maximum clock frequency
Oscillator frequency
Field through (channel OFF)
Backup switching leakage current
Operating current
Standby current
Power supply current
High-level input current
Low-level input current
input leakage current
Maximum current
Output current
High-level output current
Low-level output current
Multiplier circuit power dissipation
T
T
T
T
c
s
a
j
Parameter
jc
cs
sa
Junction
temperature
Case
temperature
Heatsink
temperature
Ambient
temperature
EPSON
2. Ensure that the regulator common pin is a sin-
gle-point ground to prevent earth loops. Make
ground lines as thick and short as possible. Use the
specified bypass capacitors for inputs and outputs.
If there is a switching load, use a tantalum or
ceramic capacitor, as these devices have a high
frequency response between the power supply and
ground.
Symbol
R
R
I
R
R
R
I
THD
t
R
OPR2
R
SWON
SWQ
P
BSON
R
t
t
MRR
P
R
t
T
K
I
I
OSC
HD
RVn
SAT
AE
HA
Q
R
ON
RV
eff
jn
D
O
a
L
I
Stabilization circuit power dissipation
Quiescent current
Reverse current
Switching transistor leakage current
Output voltage temperature gradient
Power dissipation
Voltage multiplication efficiency
Backup switch ON resistance
Load resistance
Output impedance
ON resistance
Oscillator network resistor
Stabilization voltage sensing resistor
Reference voltage
Stabilization output saturation resistance
Switching transistor ON resistance
Ambient temperature
Minimum pulsewidth
Address hold time
Data hold time
Total harmonic distortion
Thermal resistance
Memory reset recovery time
Parameter
Technical Manual
S1F70000 Series