ZLDO1117K15TC Ver la hoja de datos (PDF) - Diodes Incorporated.
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ZLDO1117K15TC Datasheet PDF : 14 Pages
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Typical Application Circuits
Figure 1 Basic Adjustable Regulator with 5V Output
A Product Line of
Diodes Incorporated
ZLDO1117
Using
VOUT
=
1.25
•
⎧
⎨1
+
⎩
R2 ⎫
R1
⎬
⎭
then the output voltage becomes:
VOUT
= 1.25
•
⎧
⎨1
+
⎩
330 ⎫
110
⎬
⎭
=
5.0V
Figure 2 Adjustable Regulator with IADJ Errors
VOUT
⎧
= 1.25 • ⎨1+
⎩
R2
R1
⎫
⎬
⎭
+
IADJ
• R2
Because IADJ typically is 55μA, its effect is negligible in most applications.
VOUT
⎧
= 1.25 • ⎨1+
⎩
330
110
+ 55 • 10−6
• 330⎬⎫
⎭
= 5.02V
~ 0.4%
A. Output capacitor selection is critical for regulator stability. Larger Cout values benefit the regulator by improving transient response and loop
stability.
B. CADJ can be used to improve ripple rejection. If CADJ is used, a Cout that is larger in value than CADJ must be used.
C. Cin is recommended if ZLDO1117 is not located near the power supply filter.
D. An external diode is recommended to protect the regulator if the input instantaneously is shorted to GND.
E. This device is designed to be stable with tantalum and MLCC capacitors with an ESR less than 0.47Ω.
ZLDO1117
Document number: DS32018 Rev. 6 - 2
8 of 14
www.diodes.com
July 2012
© Diodes Incorporated
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