LD1117-AG-XX-AA3-A-R UTC [Unisonic Technologies], LD1117-AG-XX-AA3-A-R Datasheet - Page 12

• Manufacturer Part Number: LD1117-AG-XX-AA3-A-R
• Description: LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
• Manufacturer: UTC [Unisonic Technologies]

LD1117/A
APPLICATION NOTE of LD1117/A ADJUSTABLE
(120µA max.) and ΔI
expression becomes: V
connection must be realized very close to OUT and ADJ/GND pin, while R
as near as possible to the negative Load pin. Ripple rejection can be improved by introducing a 10μF
electrolytic capacitor placed in parallel to the R
The LD1117/A adjustable has a reference voltage of between the OUT and ADJ/GND pins. I
R
From figure 4 we obtain:
V
Usually R
For better load regulation, realize a good Kelvin connection of R
OUT
1
is normally fixed to 120Ω.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
=V
REF
2
+R
value is in the range of few KΩ, so the R
Fig.8 Adjustable Output Voltage Application with improved Ripple Rejection.
2
(I
ADJ
Fig.7 Adjustable Output Voltage Application Circuit
ADJ
+I
R1
OUT
is 1μA typ. (5µA max.).
)=V
=V
Fig.6 Adjustable Output Voltage Application Circuit
REF
REF
+ R
(1+R
2
(I
2
ADJ
/R
+V
1
)
REF
/R
2
resistor (See Fig. 8)
1
)=V
REF
2
X I
(1+R
ADJ
2
product could be neglected; then the above
/R
1
) + R
LINEAR INTEGRATED CIRCUIT
1
and R
2
x I
(FOR MLCC)
2
ADJ
2
is important. Particularly R
ground connection must be placed
.
ADJ
QW-R102-006.AG
is 60µA typ.
1
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