ss8117 Silicon Standard Corporation, ss8117 Datasheet - Page 3

• Manufacturer Part Number: ss8117
• Description: 1a Adjustable Low-dropout Regulator
• Manufacturer: Silicon Standard Corporation

5/26/2005 Rev.2.2
DEFINITIONS
Output Voltage
The SS8117G provides an adjustable output voltage from
1.25V to 5V with two external resistors. It can be cal-
culated from:
V
I
Dropout Voltage
The input/output voltage differential at which the regu-
lator output no longer maintains regulation against fur-
ther reductions in input voltage. It is measured when
the output drops 20% below its nominal value. Dropout
voltage is affected by junction temperature, load cur-
rent and minimum input supply requirements.
Line Regulation
The change in output voltage for a change in input volt-
ADJ
OUT
Recommended Minimum Footprint
= 80µA (typ.)
= 1.25V x
(
1+
R
R
2
1
)
+ I
ADJ
x R
2
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voltage. The measurement is made under conditions of
low dissipation or by using pulse techniques such that
the average chip temperature is not significantly a f-
fected.
Load Regulation
The change in output voltage for a change in load cur-
rent at constant chip temperature. The measurement is
made under conditions of low dissipation or by using
pulse techniques such that the average chip tempera-
ture is not significantly affected.
Maximum Power Dissipation
The maximum total device dissipation with which the
regulator will still operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip and
is not delivered to the load.
SS8117G
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