ZLDO1117G12TA Diodes Zetex, ZLDO1117G12TA Datasheet - Page 8

• Manufacturer Part Number: ZLDO1117G12TA
• Description: IC REG LDO 1A 1.2V SOT223-3
• Manufacturer: Diodes Zetex

Specifications of ZLDO1117G12TA

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.2V
• Voltage - Input: 2.7 ~ 18 V
• Voltage - Dropout (typical): 1.11V @ 1A
• Number Of Regulators: 1
• Current - Output: 1A (Max)
• Current - Limit (min): 1.1A
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ZLDO1117G12DITR

Typical application circuits
Figure 1 Basic adjustable regulator with 5V output
Figure 2 Adjustable regulator with IADJ errors
Because I
A. Output capacitor selection is critical for regulator stability. Larger C
B. C
C. C
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. 4 - 2
(see Note C)
V
V
response and loop stability.
OUT
OUT
ADJ
in
Vin
is recommended if ZLDO1117 is not located near the power supply filter.
10 F
can be used to improve ripple rejection. If C
ADJ
=
=
. 1
. 1
typically is 55μA, its effect is negligible in most applications.
25
25
•
•
⎧
⎨
⎩
⎧
⎨
⎩
1
1
+
+
R
330
110
R
IN
2
1
I
⎫
⎬
⎭
1N4002 (See Note D)
ADJ
ZLDO1117
+
+
55
I
ADJ
ADJ
•
10
•
C
(see Note B)
R
−
OUT
ADJ
6
2
•
330
⎫
⎬
⎭
V
=
REF
. 5
ADJ
02
www.diodes.com
V
is used, a C
~ 0.4%
8 of 12
R1
R2
Using
out
then the output voltage becomes:
out
100 F
(see Note A)
that is larger in value than C
values benefit the regulator by improving transient
Vout
V
V
OUT
OUT
Diodes Incorporated
=
=
. 1
. 1
A Product Line of
25
25
•
•
⎧
⎨
⎩
⎧
⎨
⎩
1
1
+
+
R
330
110
R
2
1
⎫
⎬
⎭
ADJ
⎫
⎬
⎭
=
must be used.
5
0 .
V
ZLDO1117
© Diodes Incorporated
July 2010