S-L2985 Series
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© Seiko Instruments Inc., 2005-2010
HIGH RIPPLE-REJECTION WLP PACKAGE
LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.3.0
_00
Features
•
Output voltage:
•
High-accuracy output voltage:
•
Low dropout voltage:
•
Low current consumption:
*1.
Attention should be paid to the power dissipation of the package when the output current is large.
Applications
Package
•
WLP-4B
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•
Power supply for battery-powered devices
•
Power supply for personal communication devices
•
Power supply for home electric/electronic appliances
•
Power supply for cellular phones
TI
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1.5 V to 5.5 V, selectable in 0.1 V steps.
±1.0%
190 mV typ. (3.0 V output product, I
OUT
=
100 mA)
During operation: 50
μA
typ., 90
μA
max.
During shutdown: 0.1
μA
typ., 1.0
μA
max.
•
High peak current capability:
150 mA output is possible (@ V
IN
≥
V
OUT(S)
+
1.0 V)
*1
Ensures long battery life.
•
Built-in ON/OFF circuit:
•
Low ESR capacitor can be used: A ceramic capacitor of 0.47
μF
or more can be used for the output
capacitor.
80 dB typ. (@ 1.0 kHz)
•
High ripple rejection:
Overcurrent of output transistor can be restricted.
•
Built-in overcurrent protector:
•
Lead-free, halogen-free
ED
Seiko Instruments Inc.
PR
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The S-L2985 Series is a positive voltage regulator with a low dropout voltage, high output voltage
accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a built-
in overcurrent protector prevents the load current from exceeding the current capacitance of the output
transistor. An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the
conventional CMOS process, a larger variety of capacitors are available, including small ceramic
capacitors.
A super-small
WLP-4B package realizes high-density mounting.
1
HIGH RIPPLE-REJECTION WLP PACKAGE LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.3.0
_00
S-L2985 Series
Product Code Structure
•
The product types, output voltage and package name for the S-L2985 Series can be selected at the
user’s request. Refer to the “1.
Product Name”
for the construction of the product name, “2.
Package”
regarding the package drawings and “3.
Product Name List”
for the full product names.
1. Product name
S-L2985
x
xx
−
H4T1
Package name (abbreviation) and packing specifications
*1
H4T1: WLP-4B, Tape
Output voltage
15 to 55
(E.g., when the output voltage is 1.5 V, it is expressed as 15)
Product type
*2
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1.
Refer to the tape specifications at the end of this book.
*2.
Refer to 3. Shutdown (ON/OFF pin) under the Operation.
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Package
HB004-A-P-SD
2. Package
Package name
WLP-4B
3. Product name list
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Drawing code
Tape
HB004-A-C-SD
ON
Table
1
Output voltage
WLP-4B
1.5V±1.0%
S-L2985B15-H4T1
1.8V±1.0%
S-L2985B18-H4T1
2.5V±1.0%
S-L2985B25-H4T1
2.6V±1.0%
S-L2985B26-H4T1
2.7V±1.0%
S-L2985B27-H4T1
2.8V±1.0%
S-L2985B28-H4T1
2.9V±1.0%
S-L2985B29-H4T1
3.0V±1.0%
S-L2985B30-H4T1
3.1V±1.0%
S-L2985B31-H4T1
3.2V±1.0%
S-L2985B32-H4T1
3.3V±1.0%
S-L2985B33-H4T1
3.4V±1.0%
S-L2985B34-H4T1
3.5V±1.0%
S-L2985B35-H4T1
5.0V±1.0%
S-L2985B50-H4T1
Remark
Please contact the SII marketing department for products with an output voltage other than
those specified above or type A products.
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Seiko Instruments Inc.
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Reel
HB004-A-R-SD
3
HIGH RIPPLE-REJECTION WLP PACKAGE LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.3.0
_00
S-L2985 Series
Absolute Maximum Ratings
Table
Item
Input voltage
Symbol
V
IN
V
ON/OFF
V
OUT
P
D
T
opr
T
stg
3
(Ta
=
25°C unless otherwise specified)
Absolute Maximum Rating
Unit
V
V
SS
−
0.3 to V
SS
+
7
V
SS
−
0.3 to V
IN
+
0.3
V
SS
−
0.3 to V
IN
+
0.3
350
*1
mW
−40
to
+85
°C
−40
to
+125
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
600
500
400
300
200
100
P
D
(mW)
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0
0
50
Power Dissipation
ED
100
150
Ta (°C)
Ambient Temperature
Figure
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3
Power Dissipation of Package (When Mounted on Board)
Seiko Instruments Inc.
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Output voltage
Power dissipation
Operating ambient temperature
Storage temperature
*1.
When mounted on board
[Mounted board]
(1) Board size : 114.3 mm
×
76.2 mm
×
t1.6 mm
(2) Board name : JEDEC STANDARD51-7
5
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