UNISONIC TECHNOLOGIES CO., LTD
LD3117
500mA LOW DROPOUT LINEAR
VOLTAGE REGULATORS
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC
LD3117
are 500mA fixed output voltage low dropout
linear regulators. Wide range of available output voltage fits most of
applications. Built-in output current-limiting most thermal-limiting
provide maximal protection against any fault conditions.
FEATURES
*Guaranteed 500mA output current
*Input voltage range up to 20V
*Extremely tight load regulation
*Fast transient response
*Current-limiting and Thermal-limiting
*Three-terminal adjustable or fixed 1.5V, 1.8V, 2.2V, 2.5V, 2.7V,
2.8V, 2.9V,3.0V, 3.3V, 3.5V, 3.6V, 3.7V, 4.7V, 5.0V
ORDERING INFORMATION
Ordering Number
Package
1
○
Packing
Pin Assignment
Lead Free
Halogen Free
1: GIO
3: GOI
1
1
LD3117L-xx-AE3-○-R
LD3117G-xx-AE3-○-R
R: Tape Reel
SOT-23
5: OGI
6: IGO
Note: 1. Pin assignment: G: GND (Ground/Adjustable)
I: V
IN
(Positive Power Input) O: V
OUT
(Output)
2. xx: Output Voltage, refer to Marking Information.
www.unisonic.com.tw
Copyright © 2018 Unisonic Technologies Co., Ltd
1 of 4
QW-R102-104.a
LD3117
MARKING INFORMATION
VOLTAGE
CODE
15:1.5V
18:1.8V
22:2.2V
25:2.5V
27:2.7V
28:2.8V
29:2.9V
SOT-23
30:3.0V
33:3.3V
35:3.5V
36:3.6V
37:3.7V
47:4.7V
50:5.0V
A D : ADJ
6
I
G
O
5
O
G
I
3
G
O
I
PIN
PIN 1 PIN 2 PIN 3
CODE
PACKAGE
LINEAR INTEGRATED CIRCUIT
MARKING
1
G
I
O
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 4
QW-R102-104..a
LD3117
ABSOLUTE MAXIMUM RATINGS
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
RATINGS
UNIT
Input Voltage V
IN
V
IN
-0.3 ~ +20
V
Power Dissipation
P
D
295
mW
Operating Temperature
T
OPR
-40 ~ +85
°C
Storage Temperature
T
STG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
SYMBOL
θ
JA
RATINGS
335
UNIT
°C/W
PARAMETER
Junction to Ambient
ELECTRICAL CHARACTERISTICS
(T
A
=25°C, C
IN
=1μF, C
OUT
=10μF, unless otherwise specified)
MIN
1.47
1.77
2.16
2.45
2.65
2.74
2.84
2.94
TYP
1.50
1.80
2.20
2.50
2.70
2.80
2.90
3.00
MAX
1.53
1.83
2.24
2.55
2.75
2.86
2.96
3.06
1.5
0.5
50
5.0
MIN
1.238
3.23
3.43
3.53
3.63
4.61
4.90
TYP
1.250
3.30
3.50
3.60
3.70
4.70
5.00
MAX
UNIT
V
V
V
V
V
V
V
V
V
%V
OUT
mV
mA
mA
UNIT
For LD3117-1.5V, 1.8V, 2.2V, 2.5V, 2.7V, 2.8V, 2.9V, 3.0V
PARAMETER
SYMBOL
TEST CONDITIONS
Output Voltage
V
OUT
I
L
=2mA, V
IN-
V
OUT
=1.4V
Dropout Voltage (Note 4,5)
Line Regulation
Load Regulation (Note 2)
Current Limit (Note 3)
Standby Current
V
D
∆V
OUT
∆V
OUT
I
LIMIT
I
ST-BY
I
L
=500mA
I
L
=2mA, V
IN
-V
OUT
=2V ~ V
IN
=9V
I
L
=2mA ~ 500mA, V
IN
-V
OUT
=2V
V
IN
-V
OUT
=2V, V
OUT
=0V
I
L
=0, V
IN
=9V
10
550
For LD3117-ADJ 3.3V, 3.5V, 3.6V, 3.7V, 4.7V, 5.0V
PARAMETER
SYMBOL
TEST CONDITIONS
ADJUSTABLE (R1=120Ω, R2=200Ω, V
OUT
=3.3V)
Reference Voltage
V
REF
V
IN
-V
OUT
=2V, I
L
=2mA
Output Voltage-LD3117
V
OUT
I
L
=2mA, V
IN
-V
OUT
=1.4V
Dropout Voltage
(Notes 4, 5)
LD3117
LD3117-ADJ
Line Regulation
Load Regulation
∆V
OUT
I
L
=2mA ~ 500mA, V
IN
-V
OUT
=2V
10
50
mV
(Note 2)
Current Limit (Note 3)
I
LIMIT
V
IN
-V
OUT
=2V, V
OUT
=0V
550
mA
Standby current
I
ST-BY
I
L
=0, V
IN
=12V
5.0
mA
Adjust Pin Current
I
ADJ
V
IN
=12V
200
μA
Adjust Pin Current Change
∆I
ADJ
V
IN
=2.75V~12V, I
L
=1mA~500mA
5
μA
Notes: 1. Guaranteed by design.
Note
2. Regulation is measured at constant junction temperature, using pulsed ON time.
Note
3. Current Limit is measured at constant junction temperature, using pulsed ON time.
Note
4. Dropout is measured at constant junction temperature, using pulsed ON time, and the criterion is V
OUT
inside target value±2%.
Note
5: Dropout test is skipped at the condition of V
IN
<3V.
V
D
V
D
∆V
OUT
I
L
=500mA
I
L
=500mA
I
L
=2mA, V
IN
-V
OUT
=2V ~ V
IN
=12V
1.262
V
3.37
V
3.57
V
3.67
V
3.77
V
4.79
V
5.10
V
1.3
V
1.5
V
0.5
%V
OUT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 4
QW-R102-104..a
LD3117
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
V
IN
C
I
+
1μF
V
IN
UTC
LD3117
V
OUT
V
OUT
C
O
10μF
+
GND
APPLICATION INFORMATION
A 10μF (or larger) capacitor is recommended between V
OUT
and GND for stability. The part may oscillate without
the capacitor. Any type of capacitor can be used, but not Aluminum electrolytics when operating below -25°C. The
capacitance may be increased without limit.
A 1μF capacitor (or larger) should be placed between V
IN
to GND.
LD3117 ADJUSTABLE
V
IN
+
1uF
V
IN
UTC
LD3117
ADJ
I
ADJ
R
2
V
OUT
+
V
REF
R
1
10uF
V
OUT
+
C
R
10uF
C
R
:10uF to improve ripple rejection
V
OUT
=V
REF
(1+R
2
/R
1
)+I
ADJ
*R
2
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all UTC products described or contained herein.
UTC products are not designed for use in life support appliances, devices or systems where malfunction
of these products can be reasonably expected to result in personal injury. Reproduction in whole or in
part is prohibited without the prior written consent of the copyright owner. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 4
QW-R102-104..a
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
