LESHAN RADIO COMPANY, LTD.
LR8555
Low noise 150mA LDO regulator
LR8555 series is a group of positive voltage output Low power consumption,low dropout voltage regulator.
LR8555 can provide output value in the range of 1.2~5V every 0.1V step.It also can be customized on command.
LR8555 includes high accuracy voltage reference,error amplifier,current limit circuit and output driver module.
LR8555 has excellent load and line transient response and good temperature characteristcs,which can assure
the stabllity of chip and power system.And it uses trimming technique to output voltage accuracy with ± 2%.
LR8555 is avilable in SOT23-5,SC70-5 packages which is lead free.It also can available in these packages with lead.
Featurel
Applicationl
Cellular
Voltage
Voltage
LR8555 Typical Application Circuit
LR8555 Typical Performance
Characterilticl
LR8555-1.8V Output
CE
IN
V
DD
LR8555
GND
V
OUT
OUT
+
Cap
+
Cap
1/9
LESHAN RADIO COMPANY, LTD.
Selection Guide
LR8555 XX X X
Pin Allignment
LR8555
SC70-5
5
4
1
2
3
LR8555
LR8555
SOT23-5
5
4
1
2
3
Pin Delcription
Pin Number
SOT-23-5A
Symbol
SOT-23-5B
Function
SC-70-5
Product Clallification
Output
Voltage
1.2V
1.5V
1.8V
2.1V
2.5V
2.8V
3.0V
3.2V
3.3V
3.5V
Pagkage
Type
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
SOT-23-5A
Produgt
Name
LR8555-12PRA
LR8555-15PRA
LR8555-18PRA
LR8555-21PRA
LR8555-25PRA
LR8555-28PRA
LR8555-30PRA
LR8555-32PRA
LR8555-33PRA
LR8555-35PRA
Pagkage
Type
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
SOT-23-5B
Produgt
Name
LR8555-12PRB
LR8555-15PRB
LR8555-18PRB
LR8555-21PRB
LR8555-25PRB
LR8555-28PRB
LR8555-30PRB
LR8555-32PRB
LR8555-33PRB
LR8555-35PRB
Pagkage
Type
SC-70-5
SC-70-5
SC-70-5
SC-70-5
SC-70-5
SC-70-5
SC-70-5
SC-70-5
SC-70-5
SC-70-5
Produgt
Name
LR8555-12PQ
LR8555-15PQ
LR8555-18PQ
LR8555-21PQ
LR8555-25PQ
LR8555-28PQ
LR8555-30PQ
LR8555-32PQ
LR8555-33PQ
LR8555-35PQ
5.0V
SOT-23-5A
LR8555-50PRA
SOT-23-5B
LR8555-50PRB
SC-70-5
LR8555-50PQ
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LESHAN RADIO COMPANY, LTD.
Product Marking information:
SC70-5
5
4
SOT23-5A
SOT23-5B
5
4
5
4
Output current & EN availability
Output voltage
Year of manufacturing
Week of mannufacturing
1
2
3
1
EN
No
No
No
No
No
No
No
No
No
No
2
Code
A
B
C
D
E
F
G
H
I
J
3
Iout
50mA
100mA
150mA
200mA
250mA
300mA
350mA
400mA
450mA
500mA
1
2
EN
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
3
Code
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
Code
A
B
C
D
E
F
G
H
I
J
Iout
50mA
100mA
150mA
200mA
250mA
300mA
350mA
400mA
450mA
500mA
For example:
LR8555 with output current 150mA,SOT23-5
package with an EN pin its position
is c
The year of manufacturing: "5" stands for year 2005,
"6" stands for year 2006,and " 0 " for year 2010.
Vout
1.2V
1.3V
1.4V
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
Code
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
Iout
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
Code
2
3
4
5
6
7
8
9
0
Iout
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
Code Week of Mfg Code Week of Mfg Code Week of Mfg Code Week of Mfg Code Week of Mfg
H
S
34
45
A
1
L
12
W
23
I
T
B
2
M
13
X
24
35
46
J
U
36
47
C
3
N
14
Y
25
K
V
37
48
D
4
O
15
Z
26
A
L
W
27
38
49
E
5
P
16
F
6
Q
17
B
M
X
28
39
50
C
N
Y
29
40
51
G
7
R
18
D
O
Z
30
41
52
H
8
S
19
31
42
E
P
I
9
T
20
F
Q
J
10
U
21
32
43
G
R
33
44
K
11
V
22
Block Diagram
V
DD
V
OUT
-
+
Vref
Current Limit
CE
GND
3/9
LESHAN RADIO COMPANY, LTD.
Ablolute Maximum Ratingl
Recommended Work Conditionl
Item
Min
Recommended
Max
unit
Electrical Characterilticl
LR8555, for arbitrary output voltage
Symbol
Parameter
Conditionl
Min
Typ
Max
Unitl
VOUT
VIN*VOUT
VOUT
IOUT
VOUT
T*VOUT
LLim
Short Current Limit
4/9
LESHAN RADIO COMPANY, LTD.
Electrical Characterilticl by Output Voltage
Output Voltage
Vout (V)
Dropout Voltage, V
DIF
(V)
Condition
Typ. Max.
Typical Application Circuit
Application hintl
CE
IN
V
DD
LR8555
GND
V
OUT
OUT
+
Cap
+
Cap
5/9
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