S-L2980 Series
www.sii-ic.com
HIGH RIPPLE-REJECTION AND LOW DROPOUT
CMOS VOLTAGE REGULATOR
© Seiko Instruments Inc., 2001-2010 Rev.5.0_00
Seiko Instruments In c. 1
The S-L2980 series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and
low current consumption developed based on CMOS techn ology.
A built-in low on-resistance transistor provides a low dropout voltage and a large output current. A shutdown
circuit ensures long battery life.
Various types of output capacitors can be used in the S-L2980 series compared with the conventional CMOS
voltage regulators. A small ceramic capacitor can also be used.
Features
• Output voltage: 1.5 V to 6.0 V, selectable in 0.1 V steps
• High accuracy output volt age: ±2.0 % accuracy
• Low dropout volt age: 120 mV typ. (at 3.0 V output product, IOUT=50 mA)
• Low current consumption : During operation: 90 μA typ., 140 μA max.
During shutdown: 0.1 μA typ., 1.0 μA max.
• High peak current capa bility: 150 mA output is possible. (at VIN≥VOUT(S)+1.0 V)*1
• Built-in shut down circuit: Ensure long battery life.
• Low ESR capacitor: A 1.0 μF capacitor can b e used as the output capacitor.
(A 2.2 μF cap acitor can be used as the output capacitor for the products
whose output voltage is 1.7 V or less.)
• High ripple rejection: 70 dB typ. (at 1.0 kHz)
• Lead-free, Sn 100%, halogen-fre e*2
*1. Attention should be pai d to the powe r dissipation of the packag e whe n the load is large.
*2. Refer to “ Product Name Structure” for details.
Applications
• Power supply for battery-powered devi ce s
• Power supply for personal communication devices
• Power supply for home el ectric/electronic appliance s
• Power supply for cellular phones
Package
• SOT-23-5
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
2
Block Diagram
VIN
VSS
VOU T
ON/OFF
*1. Parasitic diode
*1
+
−
Shutdown circuit
Reference
voltage circuit
Figure 1
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 3
Product Name Structure
• The product types and output voltage for S-L2980 Series can be sele cted at the user’s request. Refer to
the “1. Product Name” for the meanings of the chara cters in the produ ct name, “2. Package” rega rdi ng
the package drawings and “3. Product Name List” for the full product names.
1. Product Name
S-L2980 x xx MC − TF x
Output v oltage
15 to 60
(e.g. when the output vol tage i s 1. 5 V,
it is ex
p
ressed as 15.
)
IC direct ion i n tape specifications
*1
Pac kage name (abbr eviat ion)
MC: SOT-23-5
Product t ype
*2
A: O N/ OF F pin positive logic
B: ON/OFF pin negative logic
Environmental code
U: Le ad-fr ee ( Sn 100% ) , halogen - free
G: Lead-fr ee ( for details, pl ease contact our sales office)
*1. Refer to the tape specifications.
*2. Refer to the “3. Shutdown Pin (ON/OFF Pin)” in the “ Operation”.
2. Package
Drawing Code
Package Name Package Tape Reel
SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
4
3. Product Name List
Table 1
Output Voltage SOT-23-5
1.5 V ±2.0 % S-L2980A15MC-TF-x
1.6 V ±2.0 % S-L2980A16MC-TF-x
1.7 V ±2.0 % S-L2980A17MC-TF-x
1.8 V ±2.0 % S-L2980A18MC-TF-x
1.9 V ±2.0 % S-L2980A19MC-TF-x
2.0 V ±2.0 % S-L2980A20MC-TF-x
2.1 V ±2.0 % S-L2980A21MC-TF-x
2.2 V ±2.0 % S-L2980A22MC-TF-x
2.3 V ±2.0 % S-L2980A23MC-TF-x
2.4 V ±2.0 % S-L2980A24MC-TF-x
2.5 V ±2.0 % S-L2980A25MC-TF-x
2.6 V ±2.0 % S-L2980A26MC-TF-x
2.7 V ±2.0 % S-L2980A27MC-TF-x
2.8 V ±2.0 % S-L2980A28MC-TF-x
2.9 V ±2.0 % S-L2980A29MC-TF-x
3.0 V ±2.0 % S-L2980A30MC-TF-x
3.1 V ±2.0 % S-L2980A31MC-TF-x
3.2 V ±2.0 % S-L2980A32MC-TF-x
3.3 V ±2.0 % S-L2980A33MC-TF-x
3.4 V ±2.0 % S-L2980A34MC-TF-x
3.5 V ±2.0 % S-L2980A35MC-TF-x
3.6 V ±2.0 % S-L2980A36MC-TF-x
3.7 V ±2.0 % S-L2980A37MC-TF-x
3.8 V ±2.0 % S-L2980A38MC-TF-x
3.9 V ±2.0 % S-L2980A39MC-TF-x
4.0 V ±2.0 % S-L2980A40MC-TF-x
4.1 V ±2.0 % S-L2980A41MC-TF-x
4.2 V ±2.0 % S-L2980A42MC-TF-x
4.3 V ±2.0 % S-L2980A43MC-TF-x
4.4 V ±2.0 % S-L2980A44MC-TF-x
4.5 V ±2.0 % S-L2980A45MC-TF-x
4.6 V ±2.0 % S-L2980A46MC-TF-x
4.7 V ±2.0 % S-L2980A47MC-TF-x
4.8 V ±2.0 % S-L2980A48MC-TF-x
4.9 V ±2.0 % S-L2980A49MC-TF-x
5.0 V ±2.0 % S-L2980A50MC-TF-x
5.1 V ±2.0 % S-L2980A51MC-TF-x
5.2 V ±2.0 % S-L2980A52MC-TF-x
5.3 V ±2.0 % S-L2980A53MC-TF-x
5.4 V ±2.0 % S-L2980A54MC-TF-x
5.5 V ±2.0 % S-L2980A55MC-TF-x
5.6 V ±2.0 % S-L2980A56MC-TF-x
5.7 V ±2.0 % S-L2980A57MC-TF-x
5.8 V ±2.0 % S-L2980A58MC-TF-x
5.9 V ±2.0 % S-L2980A59MC-TF-x
6.0 V ±2.0 % S-L2980A60MC-TF-x
Remark 1. Please cont act our sales office for type B products.
2. x: G or U
3. Please select products of environmental code = U for Sn 100%, hal ogen-free products.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 5
Pin Configurations
Table 2
Pin No. Symbol Pin Description
1 VIN Input voltage pin
2 VSS GND pin
3 ON/OFF Shutdown pin
4 NC*1 No connection
5 VOUT Output voltage pin
SOT-23-5
Top view
5
4
3
2
1
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Figure 2
Absolute Maximum Ratings
Table 3 (Ta=25 °C u nless otherwise specified)
Item Symbol Absolute Maximum Rating Unit
Input voltage VIN V
SS–0.3 to VSS+12 V
V
ON/OFF V
SS–0.3 to VSS+12 V
Output voltage VOUT V
SS–0.3 to VIN+0.3 V
300 (When not mounted on board) mW Power dissipation PD 600*1 mW
Operating ambient temperature Topr –40 to +85 °C
Storage temperature Tstg –40 to +125 °C
*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
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.
0 50 100 150
600
400
0
Power Dissi
p
ation
(
PD
)
[
mW
]
Ambi en t Tem
p
erature
(
Ta
)
[
°C
]
200
100
300
500
700
Figure 3 Power Dissipation of Package (When Mounted on Board)
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
6
Electrical Characteristics
Table 4 (Ta=25 °C u nless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Test
circuit
Output voltage
*1
V
OUT(E)
V
IN
=V
OUT(S)
+1.0 V, I
OUT
=50 mA V
OUT(S)
×
0.98 V
OUT(S)
V
OUT(S)
×
1.02 V 1
Output current
*2
I
OUT
V
IN
≥
V
OUT(S)
+1.0 V 150
*5
⎯
⎯
mA 3
Dropout voltage
*3
V
drop
I
OUT
= 50 mA 1.5 V
≤
V
OUT(S)
≤
1.7 V
⎯
0.17 0.33 V 1
1.8 V
≤
V
OUT(S)
≤
1.9 V
⎯
0.16 0.29 V 1
2.0 V
≤
V
OUT(S)
≤
2.4 V
⎯
0.15 0.26 V 1
2.5 V
≤
V
OUT(S)
≤
2.9 V
⎯
0.13 0.20 V 1
3.0 V
≤
V
OUT(S)
≤
3.2 V
⎯
0.12 0.15 V 1
3.3 V
≤
V
OUT(S)
≤
6.0 V
⎯
0.11 0.14 V 1
Line regulation
OUTIN
1 OUT
VV
Δ
VΔ
•
V
OUT(S)
+0.5 V
≤
V
IN
≤
10 V, I
OUT
=50 mA
⎯
0.05 0.2 %/V 1
Load regulation
Δ
V
OUT2
V
IN
=V
OUT(S)
+1.0 V, 1.0 mA
≤
I
OUT
≤
80 mA
⎯
12 40 mV 1
Output voltage
temperature coefficient
*4
OUT
OUT
VTaΔ
VΔ
•
V
IN
=V
OUT(S)
+1.0 V, I
OUT
=50 mA,
–40
°
C
≤
Ta
≤
85
°
C
⎯
±
100
⎯
ppm/
°
C 1
Current consumption
during operation I
SS1
V
IN
=V
OUT(S)
+1.0 V, ON/OFF pin=ON,
No load
⎯
90 140
μ
A 2
Current consumption
when shutdown I
SS2
V
IN
=V
OUT(S)
+1.0 V, ON/OFF pin =OFF,
No load
⎯
0.1 1.0
μ
A 2
Input voltage V
IN
⎯
2.0
⎯
10 V
⎯
ON/OFF pin
input voltage “H” V
SH
V
IN
=V
OUT(S)
+1.0 V, R
L
=1.0 k
Ω
1.5
⎯
⎯
V 4
ON/OFF pin
input voltage “L” V
SL
V
IN
=V
OUT(S)
+1.0 V, R
L
=1.0 k
Ω
⎯
⎯
0.3 V 4
ON/OFF pin
input current “H” I
SH
V
IN
=V
OUT(S)
+1.0 V, V
ON/OFF
=7.0 V –0.1
⎯
0.1
μ
A 4
ON/OFF pin
input current “L” I
SL
V
IN
=V
OUT(S)
+1.0 V, V
ON/OFF
=0 V –0.1
⎯
0.1
μ
A 4
Ripple rejection
RR
1.5 V
≤
V
OUT(S)
≤
3.3 V
⎯
70
⎯
dB 5
3.4 V
≤
V
OUT(S)
≤
5.0 V
⎯
65
⎯
dB 5
V
IN
=V
OUT(S)
+1.0 V,
f = 1.0 kHz,
Δ
V
rip
=0.5 V rms,
I
OUT
=50 mA 5.1 V
≤
V
OUT(S)
≤
6.0 V
⎯
60
⎯
dB 5
*1. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage at the fixed load
The output voltage when fixing IOUT(=50 mA) and inpu tting VOUT(S)+1.0 V
*2. Output current at which output voltage becomes 95 % of VOUT after gra dually increasing output current.
*3. Vdrop=VIN1−(VOUT×0.98)
VIN1 is the input voltage at which output voltage becomes 98 % of VOUT after gr adually de creasing in put volt age.
*4. Temperature change ratio in the output volt age [mV/°C] is calculated by using the following equation.
[] [] []
1000Cppm/
TVΔTa
ΔV
VVCmV/
ΔTa
ΔV
OU
OUT
OUT(S)
OUT ÷°
•
×=° 3*2*
*1
*1. Temperature change ratio of the output volt age
*2. Specified output voltage
*3. Output voltage temperat ure coefficie nt
*5. The outp ut current can be supplied at least to this value.
Due to restrictions on the package power dissipation, this value may not be satisfied.
Attention should be paid to the power dissipatio n of the package when the load is large.
This specification is guaranteed by design.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 7
Test Circuits
1.
VSS
VOUT
ON/OFF
VIN
V
A
Set to
p
ower ON
+
+
Figure 4
2.
VSS
VOUT
ON/OFF
VIN
Set to
V
IN
or GND
A
+
Figure 5
3.
VSS
VOUT
ON/OFF
VIN
V
Set to
p
ower ON
+
+
A
Figure 6
4.
VSS
VOUT
ON/OFF
VIN
V
A R
L
+
+
Figure 7
5.
VSS
VOUT
ON/OFF
VIN
V +
Set to
power ON
R
L
Figure 8
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
8
Standard Circuit
VSS
VOUT
ON/OFF
VIN
C
IN*1
C
L*2
INPUT OUTPUT
GND
Single GND
*1. C
IN
is a capacitor used to stabilize input.
*2. A ceramic capacitor of 1.0 μF or mor e can be used for C
L
, provided that A ceramic capac itor of
2.2 μF or more can be used for the product whose output voltage is 1.7 V or less.
Figure 9
Caution The above connection diagr am and const ant will not guarantees successful operation.
Perform through evaluation using the actual application to set the constant.
Application Conditions
Input capacitor (CIN): 0.47 μF or more
Input series resistance (RIN): 10 Ω or less
Output capacitor (CL): 1.0 μF or more*1
Equivalent Series Resistance (ESR) for output capacitor: 10 Ω or less
*1. If the product whose output voltage is 1.7 V or less will be use d, CL is 2.2 μF or more.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 9
Technical Terms
1. Low Dropout Voltage Regulator
The low dropout voltage regulator is a voltage regulator whose dropout voltage i s low d ue to its built-in
low on-resistance transistor.
2. Low ESR
Low ESR means the Equivalent Series Resistance of a cap acitor is small. The low ESR ceramics
output capacitor (CL) can be used in the S-L2980 Series. A capacitor whose ESR is 10Ω or less
can be used.
3. Output Voltage (VOUT)
The accuracy of the output voltage is ensured at ± 2.0 % under the specified conditions of fixed input
voltage*1, fixed output current, and fixed temperature.
*1. Diff ers depending upon the produ ct.
Caution If the above conditions cha nge, the output voltage value may vary and exceed the
accuracy range of the outpu t voltage. Refer to the “ Electrical Characteristics” and
“ Typical Characteristics” for det ails.
⎟
⎠
⎞
⎜
⎝
⎛
•OUTIN
OUT1
V ΔV
ΔV
Regulation Line 4.
Indicates the dependency of the output voltage on the input voltage. That is, the value sh ows how
much the output voltage changes due to a change in the input voltage with the output cu rrent remaining
unchanged.
5. Load Regulation (ΔVOUT2)
Indicates the dependency of the output voltage on the output current. That is, the value shows how
much the output voltage changes due to a change in the output current with the input voltage remaining
unchanged.
6. Dropout Voltage (Vdrop)
Indicates the difference between the input voltage (VIN1) and output voltage when the output voltage
falls to 98 % of the output voltage (VOUT(E)) by gradually decre asing the input voltage.
Vdrop=VIN1–(VOUT(E)×0.98)
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
10
(
)
OUT
OUT
V ΔTa
ΔV
tageOutput Vol oft Coefficien eTemperatur 7. •
The shadowed area in Figure 10 is the range where VOUT varies in the operating temperature range
when the temperature coefficient of the output voltage is ±100 ppm/°C.
VOUT
(
E
)
*1
−40 25
+
0.28 mV / °C
VOUT
[V]
85 Ta [°C]
−
0.28 mV / °C
Example of S-L2 980A 28 Typ. pr oduc t
*1. V
OUT(E) is a mesured value of output voltage at 25 °C.
Figure 10
Temperature change ratio in the output voltage [mV/°C] is calculated by using the followi ng equation.
[] [] []
1000Cppm/
TVΔTa
ΔV
VVCmV/
ΔTa
ΔV
OU
OUT
OUT(S)
OUT ÷°
•
×=° 3*2*
*1
*1. Temperature change ratio of the output volt age
*2. Specified output voltage
*3. Output voltage temperat ure coefficie nt
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 11
Operation
1. Basic Operation
Figure 11 shows the block diagram of the S-L2980 Se ries.
The error amplifier compares the reference voltage (Vref) with the Vfb, which is the output voltage
resistance-divided by the feedback resistors Rs and Rf. It supplies the output transistor with the gate
voltage nece ssary to ensure certain output voltage free of any fluctuations of input voltage and
temperature.
Reference voltage circuit
VOUT
*1
VSS
VIN
R
s
R
f
Error
amplifier
Current source
V
ref
–
+
V
fb
*1. Parasitic diode
Figure 11
2. Output Transistor
The S-L2980 Series uses a low on-re sistance P-channel MOS FET as the output transistor.
Be sure that VOUT does not exceed VIN+0.3 V to prevent the voltage regulator from being bro ken due to
inverse current flowing from VOUT pin through a parasitic diode to VIN pin.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
12
3. Shut down Pin (ON/OFF Pin)
This pin sta rts and stops the regulator.
When the ON/OFF pin is turned to the shutdown level, the operation of all internal circuits stops, the
built-in P-channel MOS FET output transistor between VIN pin and VOUT pin is turned off to make
current consumption drastically reduced. The VOUT pin becomes the Vss level due to internally divided
resistance of several hundreds kΩ between the VOUT pin and VSS pin.
Furthermore, the structure of the ON/OFF pin is as shown in Figure 12. Since the ON/OFF pin is
neither pulled down nor pulled up interna lly, do not use it in the floating state. In addition, please note
that current consumption increases if a voltage of 0.3 V to VIN–0.3 V is applied to the ON/OFF pin.
When the ON/OFF pin is not used, connect it to the VIN pin in case the logic type is “A” and to the VSS
pin in case of “B”.
Table 5
Logic type ON/OFF pi n Internal circuit VOUT pin vol tage Current consumption
A “H”: Power on Operating Set value ISS1
A “L”: Power of f Stop VSS level ISS2
B “H”: Power off Stop VSS level ISS2
B “L”: Power on Operating Set value ISS1
VSS
ON/OFF
VIN
Figure 12
Selection of Output Capacitor (CL)
The S-L2980 series needs an output capacitor between VOUT pin and VSS pin for phase compensation.
A ceramic capacitor w hose cap acitan ce is 1.0 μF or more*1 can be used. When an OS (Organic Semi-
conductor) capacitor, a tantalum capacitor or an aluminum electrolyte capacito r is used, the capacitance
should be 2.2 μF or more and the ESR should be 10 Ω or less.
The value of the output overshoot or undershoot transient response varies depending on the v alue of the
output capacitor.
Sufficient evaluation in cluding temperature depende ncy in the actual environment is needed.
*1. If the product whose output voltage is 1.7 V or less will be used , the capacitance should be 2.2 μF
or more.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 13
Precautions
• Wiring patterns for VIN pin, VOUT pin and GND pin should be d esigned to hold low impedance. When
mounting an output capacitor between the VOUT and VSS pins (CL) and a capacitor for st abilizing the
input between VIN and VSS pins (CIN), the distance from the capacitors to these pins sho uld be as short
as possible.
• Note that output voltage may increase when a series regulator is used at low load current (1.0 mA or less).
• Generally a series reg ulator may cause oscillation, depending on the selection of external parts. The
following conditions are recommended for this IC. However, be sure to perform sufficient evaluation under
the actual usage conditions for selection, including e v aluation of temperature characteristics.
Input capacitor (CIN): 0.47 μF or more
Output capacitor (CL): 1.0 μF or more*1
Equivalent Series Resistance (ESR): 10 Ω or less
Input series resistance (RIN): 10 Ω or less
*1. If the product whose output voltage will be is 1.7 V or less is u sed, the capacitance should be 2.2 μF
or more.
• A voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor
is small or not connected.
• The application condition for input voltage, output voltage and load current should not exceed the package
power dissip ation.
• Do not apply an electrostatic discharge to this IC that exceeds the performan ce ratings of the built-in
electrostatic protection circuit.
• In determining output current attention should be paid to the output current value specified in the Table 4
for “ Electrical Characteristics” and the footnote *5.
• SII claims no responsibility for any and all disputes a rising out of or in connection with any infringe ment of
the product s including this IC upon p atents owned by a third party.
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
14
Typical Characteristics
1. Output voltage versus Output current (When load current inc reases)
S-L2980A15 (Ta=25°C) S-L2980A30 (Ta=25°C)
0.0
0.5
1.0
1.5
2.0
0 100 200 300 400 500
IOUT [mA]
VOUT [V]
VIN=1.8 V
2.0 V
10 V
3.0 V
2.5 V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0100 200 300 400 500
IOUT [mA]
V
OUT
[
V
]
V
IN
=3.3 V
3.5 V
4.0 V
10 V
5.0 V
S-L2980A50 (Ta=25°C)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 100 200 300 400 500
IOUT [mA]
VOUT [V]
VIN=5.3 V
5.5 V 7.0 V
6.0 V
10 V
Remark In determining ou tput current, attention
should be paid to the followings.
1) The minimum output current value
and footnote *5 in the Table 4 for the
“ Electrical Characteristics”.
2) The p ackage power dissi pation
2. Maximum output current versus Input voltage
S-L2980A15 (Short-ci rcuit protection included) S-L2980A30 (Short-circuit protection included)
0
100
200
300
400
500
0 2 4 6 8 10
VIN [V]
I
OUT
max.
[
mA
]
Ta=–40°C
25°C 85°C
0
100
200
300
400
500
2 4 6 8 10
VIN [V]
IOUT max. [mA]
Ta=–40°C
25°C 85°C
S-L2980A50 (Short circuit protection included)
0
100
200
300
400
500
4 6 8 10
VIN [V]
I
OUT
max.
[
mA
]
Ta=–40°C
25°C 85°C
Remark In determining output current, attention
should be paid to the followings.
1) The minim um output current value
and footnote *5 in the Table 4 for the
“ Electrical Characteristics”.
2) The p ackage power di ssipation
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 15
3. Output voltage versus Input voltage
S-L2980A15 (Ta=25°C) S-L2980A30 (Ta=25°C)
1.40
1.45
1.50
1.55
1.60
1.0 1.5 2.0 2.5 3.0 3.5
VIN [V]
VOUT [V]
IOUT=1.0 mA
30 mA
50 mA
100 mA
2.95
3.00
3.05
3.10
3.15
2.5 3.0 3.5 4.0 4.5 5.0
VIN [V]
VOUT [V]
2.85
2.90
IOUT=1.0 mA
30 mA
50 mA
100 mA
S-L2980A50 (Ta=25°C)
4.80
4.90
5.00
5.10
5.20
4.5 5.0 5.5 6.0 6.5 7.0
VIN [V]
VOUT [V]
IOUT=1.0 mA
30 mA
50 mA
100 mA
4. Dropout voltage versus Output voltage
S-L2980A15 S-L2980A30
0
100
200
300
400
500
600
0 50 100 150
IOUT [mA]
Vdrop [mV]
Ta=–40°C
25°C 85°C
0
50
100
150
200
250
300
350
400
050 100 150
IOUT [mA]
Vdrop [mV]
Ta=–40°C
25°C
85°C
S-L2980A50
0
50
100
150
200
250
300
350
0 50 100 150
IOUT [mA]
Vdrop [mV]
Ta=–40°C
25°C 85°C
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
16
5. Output voltage versus Ambient Temperature
S-L2980A15 S-L2980A30
1.47
1.48
1.49
1.50
1.51
1.52
1.53
–50 0 50 100
Ta [°C]
VOUT [V]
2.94
2.96
2.98
3.00
3.02
3.04
3.06
–50 0 50 100
Ta [°C]
VOUT [V]
S-L2980A50
4.90
4.95
5.00
5.05
5.10
–50 0 50 100
Ta [°C]
VOUT [V]
6. Line regulation versus Ambient Temperature 7. Load regulation versus Ambient Temperature
S-L2980Axx S-L2980Axx
0
10
20
30
40
–50 0 50 100
Ta [°C]
ΔVOUT1 [mV]
S-L2980A15
CIN=4.7
μ
F, CL=10
μ
F
S-L2980A30
S-L2980A50
0
10
20
30
40
–50 0 50 100
Ta [°C]
ΔVOUT2 [mV]
S-L2980A15
CIN=4.7 μF, CL=10 μF
S-L2980A30
S-L2980A50
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 17
8. Threshold voltage of ON/OFF pin versus Input voltage
S-L2980A15
0.0
0.5
1.0
1.5
0 2 4 6 8 10 12
VIN
[
V
]
VSH / VSL [V]
Ta=–40°C
25°C
85°C
Ta=–40°C
25°C
85°C
RL=100 Ω, CIN=4.7
μ
F, CL=10
μ
F
9. Current consumption v ersus Input volt age
S-L2980A15 S-L2980A30
0
20
40
60
80
100
0 2 4 6 8 10
VIN [V]
ISS1 [μA]
25°C 85°C
Ta=–40°C
0
20
40
60
80
100
0 2 4 6 8 10
VIN [V]
ISS1 [μA]
25°C 85°C
Ta=–40°C
S-L2980A50
0
20
40
60
80
100
0 2 4 6 8 10
VIN [V]
ISS1 [μA]
25°C 85°C
Ta=–40°C
10. Ripple rejection
S-L2980A30 (Ta=25°C) S-L2980A50 (Ta=25°C)
0
20
40
60
80
100
Frequency [Hz]
Ripple Rejection [dB]
V
IN
=4.0 V, C
L
=2.2 μF
10
100
1 k 10 k
100 k 1 M
50 mA
I
OUT
=1 mA
0
20
40
60
80
100
Frequency [Hz]
Ripple Rejection [dB]
V
IN
=6.0 V, C
L
=2.2 μF
10
100
1 k
10 k
100 k 1 M
50 mA
I
OUT
=1 mA
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series Rev.5.0_00
Seiko Instruments In c.
18
Reference Data
1. Transient Response Characteris tic s (S-L2980A30MC, Typical data, Ta=25°C)
Overshoot
Input voltage
or
Load curren t
Output voltage
Undershoot
1-1. Power Source Fluctuation
Overshoot Undershoot
TIME (20
μ
s / di v.)
VOUT[V]
VIN
CL=2.2
μ
F
VIN, VON/OFF=4.0 →5.0 V, IOUT=1.0 mA
5.0
4.0
3.10
3.05
3.0
VIN
VOUT
VIN[V]
TIME (20
μ
s / d iv.)
VOUT[V]
VIN
CL=2.2
μ
F
5.0
4.0
3.10
3.05
3.0
VIN, VON/OFF=5.0→4.0 V, IOUT=1.0 m A
VOUT
VIN[V]
Overshoot Undershoot
TIME (20
μ
s / d iv.)
VOUT[V]
VIN
CL=2.2
μ
F
5.0
4.0
3.10
3.05
3.0
VIN, VON/OFF=4.0→5.0 V, IOUT=50 m A
VIN[V]
VOUT
TIME (20
μ
s / d iv.)
VOUT[V]
VIN
CL=2.2 μF
VIN, VON/OFF=5.0→4.0 V, IOUT=50 mA
5.0
4.0
3.10
3.05
3.0 VOUT
VIN[V]
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.5.0_00 S-L2980 Series
Seiko Instruments In c. 19
1-2. Load Fluctuation
Overshoot Undershoot
TIME (20
μ
s / d i v.)
VOUT[V]
IOUT
CL=2.2 μF
VIN, VON/OFF=4 .0 V, IOUT=50 mA→1.0 m A
50
1.0
3.10
3.05
3.0
IOUT[mA]
VOUT
TIME (20
μ
s / d i v.)
3.10
3.05
3.0
VOUT[V]
IOUT
CL=2.2 μF
VIN, VON/OFF=4 .0 V, IOUT=1.0 mA→50 m
A
50
1.0
VOUT
IOUT[mA]
1-3. ON/OFF Switching (S-L2980A50MC, Typical data, Ta=25°C)
Overshoot Undershoot
0
1
2
3
4
5
6
7
TIME (20
μ
s / d iv.)
VON/OFF / VOUT [V]
VON/OFF
VIN=6.0 V, RL=5.0 kΩ, CL=2.2
μ
F
VOUT
0
1
2
3
4
5
6
7
TIME (20
μ
s / div.)
VON/OFF / VOUT [V]
VON/OFF
VIN=6.0 V, RL=5.0 kΩ, CL=2.2
μ
F
VOUT
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
2.9±0.2
1.9±0.2
0.95±0.1
0.4±0.1
0.16 +0.1
-0.06
123
4
5
No. MP005-A-P-SD-1.2
MP005-A-P-SD-1.2
SOT235-A-PKG Dimensions
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
ø1.5 +0.1
-0 2.0±0.05
ø1.0 +0.2
-0 4.0±0.1
1.4±0.2
0.25±0.1
3.2±0.2
123
45
No. MP005-A-C-SD-2.1
MP005-A-C-SD-2.1
SOT235-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches:40.0±0.2)
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
QTY. 3,000
No. MP005-A-R-SD-1.1
MP005-A-R-SD-1.1
SOT235-A-Reel
Enlarged drawing in the central part
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