S-818A20AMC-BGAT2G [SII]
LOW DROPOUT CMOS VOLTAGE REGULATOR; 低压差CMOS电压稳压器
| 型号： | S-818A20AMC-BGAT2G |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | LOW DROPOUT CMOS VOLTAGE REGULATOR |
| 文件： | 总32页 (文件大小：525K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Rev.2.1_00
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
The S-818 Series is a positive voltage regulator
developed by CMOS technology and featured by low
dropout voltage, high output voltage accuracy and low
current consumption.
Built-in low on-resistance transistor provides low
dropout voltage and large output current. A ceramic
capacitor of 2 µF or more can be used as an output
capacitor. A shutdown circuit ensures long battery life.
The SOT-23-5 miniaturized package and the SOT-89-5
package are recommended for configuring portable
devices and large output current applications,
respectively.
Features
• Low current consumption:
At operation mode: Typ. 30 µA, Max. 40 µA
At shutdown mode: Typ. 100 nA, Max. 500 nA
2.0 to 6.0 V, selectable in 0.1 V steps.
• Output voltage:
• High accuracy output voltage: 2.0%
• Peak output current:
200 mA capable (3.0 V output product, VIN=4 V)*1
300 mA capable (5.0 V output product, VIN=6 V)*1
Typ. 170 mV (5.0 V output product, IOUT=60 mA)
• Low dropout voltage:
• A ceramic capacitor (2 µF or more) can be used as an output capacitor.
• Built-in shutdown circuit
• Small package:
• Lead-free products
SOT-23-5, SOT-89-5
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
• Power source for battery-powered devices, personal communication devices and home electric/electronic
appliances
Packages
Package Name
Drawing Code
Tape
Package
MP005-A
UP005-A
Reel
MP005-A
UP005-A
SOT-23-5
SOT-89-5
MP005-A
UP005-A
1
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Block Diagram
*1
VIN
VOUT
+
ON/OFF
circuit
ON/OFF
VSS
−
Reference
voltage
*1. Parasitic diode
Figure 1
2
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Product Code Structure
1. Product name
S-818
x
xx
A
xx
-
xxx
T2
G
IC direction in tape specifications*1
Product name (abbreviation)*2
Package name (abbreviation)
MC: SOT-23-5
UC: SOT-89-5
Output voltage
20 to 60
(e.g., When the output voltage is 2.0 V,
it is expressed as 20.)
Product type*3
A: ON/OFF pin positive logic, high active
B: ON/OFF pin negative logic, low active
*1. Refer to the taping specifications at the end of this book.
*2. Refer to the “Table 1” under the “2. Product name list”.
*3. Refer to “3. ON/OFF pin (Shutdown pin)” in the “ Operation”.
3
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
2. Product name list
Table 1
Output Voltage
2.0 V±2.0%
2.1 V±2.0%
2.2 V±2.0%
2.3 V±2.0%
2.4 V±2.0%
2.5 V±2.0%
2.6 V±2.0%
2.7 V±2.0%
2.8 V±2.0%
2.9 V±2.0%
3.0 V±2.0%
3.1 V±2.0%
3.2 V±2.0%
3.3 V±2.0%
3.4 V±2.0%
3.5 V±2.0%
3.6 V±2.0%
3.7 V±2.0%
3.8 V±2.0%
3.9 V±2.0%
4.0 V±2.0%
4.1 V±2.0%
4.2 V±2.0%
4.3 V±2.0%
4.4 V±2.0%
4.5 V±2.0%
4.6 V±2.0%
4.7 V±2.0%
4.8 V±2.0%
4.9 V±2.0%
5.0 V±2.0%
5.1 V±2.0%
5.2 V±2.0%
5.3 V±2.0%
5.4 V±2.0%
5.5 V±2.0%
5.6 V±2.0%
5.7 V±2.0%
5.8 V±2.0%
5.9 V±2.0%
6.0 V±2.0%
SOT-23-5
SOT-89-5
S-818A20AMC-BGAT2G
S-818A21AMC-BGBT2G
S-818A22AMC-BGCT2G
S-818A23AMC-BGDT2G
S-818A24AMC-BGET2G
S-818A25AMC-BGFT2G
S-818A26AMC-BGGT2G
S-818A27AMC-BGHT2G
S-818A28AMC-BGIT2G
S-818A29AMC-BGJT2G
S-818A30AMC-BGKT2G
S-818A31AMC-BGLT2G
S-818A32AMC-BGMT2G
S-818A33AMC-BGNT2G
S-818A34AMC-BGOT2G
S-818A35AMC-BGPT2G
S-818A36AMC-BGQT2G
S-818A37AMC-BGRT2G
S-818A38AMC-BGST2G
S-818A39AMC-BGTT2G
S-818A40AMC-BGUT2G
S-818A41AMC-BGVT2G
S-818A42AMC-BGWT2G
S-818A43AMC-BGXT2G
S-818A44AMC-BGYT2G
S-818A45AMC-BGZT2G
S-818A46AMC-BHAT2G
S-818A47AMC-BHBT2G
S-818A48AMC-BHCT2G
S-818A49AMC-BHDT2G
S-818A50AMC-BHET2G
S-818A51AMC-BHFT2G
S-818A52AMC-BHGT2G
S-818A53AMC-BHHT2G
S-818A54AMC-BHIT2G
S-818A55AMC-BHJT2G
S-818A56AMC-BHKT2G
S-818A57AMC-BHLT2G
S-818A58AMC-BHMT2G
S-818A59AMC-BHNT2G
S-818A60AMC-BHOT2G
S-818A20AUC-BGAT2G
S-818A21AUC-BGBT2G
S-818A22AUC-BGCT2G
S-818A23AUC-BGDT2G
S-818A24AUC-BGET2G
S-818A25AUC-BGFT2G
S-818A26AUC-BGGT2G
S-818A27AUC-BGHT2G
S-818A28AUC-BGIT2G
S-818A29AUC-BGJT2G
S-818A30AUC-BGKT2G
S-818A31AUC-BGLT2G
S-818A32AUC-BGMT2G
S-818A33AUC-BGNT2G
S-818A34AUC-BGOT2G
S-818A35AUC-BGPT2G
S-818A36AUC-BGQT2G
S-818A37AUC-BGRT2G
S-818A38AUC-BGST2G
S-818A39AUC-BGTT2G
S-818A40AUC-BGUT2G
S-818A41AUC-BGVT2G
S-818A42AUC-BGWT2G
S-818A43AUC-BGXT2G
S-818A44AUC-BGYT2G
S-818A45AUC-BGZT2G
S-818A46AUC-BHAT2G
S-818A47AUC-BHBT2G
S-818A48AUC-BHCT2G
S-818A49AUC-BHDT2G
S-818A50AUC-BHET2G
S-818A51AUC-BHFT2G
S-818A52AUC-BHGT2G
S-818A53AUC-BHHT2G
S-818A54AUC-BHIT2G
S-818A55AUC-BHJT2G
S-818A56AUC-BHKT2G
S-818A57AUC-BHLT2G
S-818A58AUC-BHMT2G
S-818A59AUC-BHNT2G
S-818A60AUC-BHOT2G
Remark Please contact our sales office for type B products.
4
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Pin Configurations
Table 2
SOT-23-5
Top view
Pin No.
Symbol
VIN
Pin description
Input voltage pin
GND pin
Shutdown pin
No connection
Output voltage pin
5
4
1
2
3
4
5
VSS
ON/OFF
NC*1
VOUT
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
1
2
3
Figure 2
Table 3
SOT-89-5
Top view
Pin No.
Symbol
VOUT
VSS
Pin description
Output voltage pin
GND pin
No connection
Shutdown pin
Input voltage pin
1
2
3
4
5
5
4
NC*1
ON/OFF
VIN
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
1
3
2
Figure 3
5
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Absolute Maximum Ratings
Table 4
(Ta=25°C unless otherwise specified)
Item
Symbol
VIN
VON/OFF
VOUT
Absolute Maximum Rating
Unit
V
V
V
mW
mW
mW
mW
°C
VSS−0.3 to VSS+12
VSS−0.3 to VSS+12
VSS−0.3 to VIN+0.3
250 (When not mounted on board)
600*1
Input voltage
Output voltage
SOT-23-5
SOT-89-5
Power dissipation
PD
500 (When not mounted on board)
1000*1
Operating ambient temperature
Storage temperature
Topr
Tstg
−40 to +85
−40 to +125
°C
*1. When mounted on board
[Mounted on 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.
1000
800
SOT-89-5
SOT-23-5
600
400
200
0
100
150
50
0
Ambient Temperature (Ta) [°C]
Figure 4 Power Dissipation of Package (When Mounted on Board)
6
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Electrical Characteristics
Table 5
(Ta=25°C unless otherwise specified)
Test
Parameter
Symbol
Conditions
Min.
Typ. Max. Unit
circuit
1
VOUT(S) VOUT(S) VOUT(S)
×0.98
Output voltage*1
Output current*2
VOUT(E)
IOUT
VIN=VOUT(S)+1 V, IOUT=30 mA
V
×1.02
V
OUT(S)+1 V≤ 2.0 V≤VOUT(S)≤2.4 V 100*5
mA
mA
mA
mA
mA
V
3
3
3
3
3
1
1
1
1
1
1
1
1
2.5 V≤VOUT(S)≤2.9 V 150*5
3.0 V≤VOUT(S)≤3.9 V 200*5
4.0 V≤VOUT(S)≤4.9 V 250*5
5.0 V≤VOUT(S)≤6.0 V 300*5
VIN≤10 V
Dropout voltage*3
Vdrop
I
OUT=60 mA 2.0 V≤VOUT(S)≤2.4 V
0.51
0.38
0.30
0.24
0.20
0.18
0.17
0.17
0.87
0.61
0.44
0.33
0.26
0.22
0.21
0.20
2.5 V≤VOUT(S)≤2.9 V
3.0 V≤VOUT(S)≤3.4 V
3.5 V≤VOUT(S)≤3.9 V
4.0 V≤VOUT(S)≤4.4 V
4.5 V≤VOUT(S)≤4.9 V
5.0 V≤VOUT(S)≤5.4 V
5.5 V≤VOUT(S)≤6.0 V
V
V
V
V
V
V
V
∆VOUT1
∆VIN • VOUT
∆VOUT2
V
OUT(S)+0.5 V≤VIN≤10 V,
Line regulation 1
Line regulation 2
Load regulation
0.05
0.05
30
0.2 %/V
1
1
1
1
2
I
OUT=30 mA
V
OUT(S)+0.5 V≤VIN≤10 V,
0.2 %/V
I
OUT=10 µA
∆VIN • VOUT
VIN=VOUT(S)+1 V,
10 µA≤IOUT≤80 mA
VIN=VOUT(S)+1 V, IOUT=30 mA,
−40°C≤Ta≤85°C
∆VOUT3
50
40
mV
∆VOUT
∆Ta • VOUT
Output voltage
ppm
/°C
100
30
temperature coefficient*4
Current consumption
VIN=VOUT(S)+1 V,
ISS1
µA
at operation
ON/OFF pin=ON, no load
VIN=VOUT(S)+1 V,
Current consumption
at shutdown
ISS2
VIN
0.1
0.5
10
µA
V
2
1
4
ON/OFF pin=OFF, no load
Input voltage
Shutdown pin
VIN=VOUT(S)+1 V, RL=1 kΩ,
Judged by VOUT output level.
VIN=VOUT(S)+1 V, RL=1 kΩ,
Judged by VOUT output level.
VSH
1.5
V
input voltage "H"
Shutdown pin
VSL
ISH
ISL
0.3
0.1
0.1
V
4
4
4
5
−0.1
−0.1
45
input voltage "L"
Shutdown pin
VIN=VOUT(S)+1 V, VON/OFF=7 V
µA
µA
dB
input current "H"
Shutdown pin
VIN=VOUT(S)+1 V, VON/OFF=0 V
input current "L"
VIN=VOUT(S)+1 V, f=100 Hz,
∆Vrip=0.5 V p-p, IOUT=30 mA
RR
Ripple rejection
7
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
*1. VOUT(S)=Specified output voltage
V
OUT(E)=Effective output voltage
i.e., The output voltage when fixing IOUT (=30 mA) and inputting VOUT(S)+1.0 V.
*2. Output current at which output voltage becomes 95 % of VOUT(E) after gradually increasing output current.
*3. Vdrop=VIN1*1−(VOUT(E)×0.98)
*1. The Input voltage at which output voltage becomes 98 % of VOUT(E) after gradually decreasing input
voltage.
*4. Output voltage shift by temperature [mV/°C] is calculated using the following equation.
∆VOUT
∆Ta
∆VOUT
∆Ta • VOUT
[
mV/°C *1
]
= VOUT(S)
[
V *2
]
×
[
ppm/°C *3
÷1000
]
*1. Temperature change ratio for output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
*5. These figures mean that every part can supply output current at least to these values
8
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Test Circuits
1.
+
A
VIN
VOUT
VSS
+
V
ON/OFF
Set to
power ON
Figure 5
2.
3.
4.
5.
VIN
VOUT
VSS
A
ON/OFF
Set to
VIN or GND
Figure 6
+
A
VIN
ON/OFF
VOUT
+
V
VSS
Set to
power ON
Figure 7
VIN
VOUT
+
+
RL
V
A
ON/OFF
VSS
Figure 8
VIN
VOUT
VSS
+
V
ON/OFF
Set to
RL
power ON
Figure 9
9
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Application Conditions
Input capacitor (CIN):
0.47 µF or more
2 µF or more
Output capacitor (CL):
Equivalent series resistor (ESR): 10 Ω or less
Input series resistor (RIN)
10 Ω or less
Caution A general series regulator may oscillate, depending on the external components selected.
Check that no oscillation occurs with the application using the above capacitor.
Standard Circuit
INPUT
OUTPUT
VIN
VOUT
*1
*2
CIN
CL
VSS
GND
Single GND
*1. CIN is a capacitor used to stabilize input. Use a capacitor of 0.47 µF or more
*2. In addition to a tantalum capacitor, a ceramic capacitor of 2.0 µF or more can be used for CL.
Figure 10
Caution The above connection diagram and constant will not guarantee successful operation.
Perform through evaluation using the actual application to set the constant.
Technical Terms
1. Low dropout voltage regulator
The low dropout voltage regulator is a voltage regulator having a low dropout voltage characteristic due to
the internal low on-resistance transistor.
2. Output voltage (VOUT
)
The accuracy of the output voltage is ensured at 2.0 % under the specified conditions of input voltage,
output current, and temperature, which differ product by product.
Caution When the above conditions are changed, the output voltage may vary and go out of the
accuracy range of the output voltage. Refer to the “ Electrical Characteristics” and
“ Characteristics” for details.
3. Line regulation 1 (∆VOUT1) and Line regulation 2 (∆VOUT2
)
Line regulation indicates the input voltage dependence of the output voltage. The value shows how much
the output voltage changes due to the change of the input voltage when the output current is kept
constant.
10
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
4. Load regulation (∆VOUT3
)
Load regulation indicates the output current dependence of output voltage. The value shows how much
the output voltage changes due to the change of the output current when the input voltage is kept
constant.
5. Dropout voltage (Vdrop
)
Let VIN1 be an input voltage where the output voltage falls to the 98 % of the actual output voltage
(VOUT(E)) when gradually decreasing input voltage. The dropout voltage is the difference between the VIN1
and the resultant output voltage defined as following equation.
Vdrop=VIN1−(VOUT(E)×0.98)
∆VOUT
∆Ta • VOUT
6. Temperature coefficient of output voltage
The output voltage lies in the shaded area in the whole operating temperature shown in Figure 11 when
the temperature coefficient of the output voltage is 100 ppm/°C.
VOUT [V]
+0.28mV/°C
*1
VOUT(E)
−0.28mV/°C
25
*1. The value of the output voltage measured at 25°C.
−40
85
°
Figure 11 Temperature coefficient of output voltage (Ex. Typ. product for S-818A28A)
Temperature change ratio for output voltage [mV/°C] is calculated by using the following equation.
∆VOUT
∆Ta
∆VOUT
∆Ta • VOUT
*2
[
mV/°C *1
]
= VOUT(S)
[
V
]
×
[
ppm/°C *3
÷1000
]
*1. Temperature change ratio for output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
11
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Operation
1. Basic Operation
Figure 12 shows the block diagram of the S-818 Series.
The error amplifier compares a reference voltage (Vref) with the part of the output voltage divided by the
feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage, necessary to ensure
certain output voltage free of any fluctuations of input voltage and temperature.
VIN
*1
Current source
Error amplifier
VOUT
Vref
−
+
Rf
Reference
voltage circuit
RS
VSS
*1. Parasitic diode
Figure 12 Block diagram
2. Output Transistor
The S-818 Series uses a Pch MOS FET as the output transistor.
Be sure that VOUT does not exceed VIN+0.3 V to prevent the voltage regulator from being damaged due to
inverse current flowing from VOUT pin through a parasitic diode to VIN pin.
12
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
3. ON/OFF pin (Shutdown pin)
This pin activates and inactivates the regulator.
When the ON/OFF pin is switched to the shutdown level, the operation of all internal circuit stops, the
built-in Pch MOS FET output transistor between VIN and VOUT pin is switched off, suppressing current
consumption. The VOUT pin goes to the Vss level due to internal divided resistance of several MΩ
between VOUT pin and VSS pin.
The structure of the ON/OFF pin is shown in Figure 13. Since the ON/OFF pin is neither pulled down nor
pulled up internally, do not keep it in the floating state. Current consumption increases if a voltage of
0.3 V to VIN−0.3 V is applied to the ON/OFF pin. When the shutdown pin is not used, connect it to the VIN
pin for product type "A" and to the VSS pin for product type "B".
Table 6 ON/OFF pin function by product type
Product type
ON/OFF pin
“H”: Power on
“L”: Shutdown
“H”: Shutdown
“L”: Power on
Internal circuit VOUT pin voltage Current consumption
A
A
B
B
Operating
Stop
Set value
VSS level
VSS level
Set value
Iss1
Iss2
Iss2
Iss1
Stop
Operating
VIN
ON/OFF
VSS
Figure 13 The structure of the ON/OFF Pin
Selection of Output Capacitor (CL)
The S-818 Series needs an output capacitor between VOUT pin and VSS pin for phase compensation. A
small ceramic or an OS electrolyte capacitor of 2 µF or more can be used. When a tantalum or an
aluminum electrolyte capacitor is used, the capacitance must be 2 µF or more and the ESR must be 10 Ω
or less.
Attention should be paid not to cause an oscillation due to increase of ESR at low temperatures when an
aluminum electrolyte capacitor is used.
Evaluate the performance including temperature characteristics before prototyping the circuit.
Overshoot and undershoot characteristics differ depending upon the type of the output capacitor. Refer
to the “CL dependence” data in “ Transient Response Characteristics”.
13
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Precautions
• Wiring patterns for the VIN pin, VOUT pin and GND pin should be designed so that the impedance is low.
When mounting an output capacitor (CL) or an input capacitor (CIN), the distance from the capacitor to the
VOUT pin and to the VSS pin should be as short as possible.
• Note that output voltage may increase when a voltage regulator is used at low load current (Less than
10 µA).
• To prevent oscillation, the external components should be used under the following conditions:
Input capacitor (CIN):
Output capacitor (CL):
0.47µF or more
2 µF or more
Equivalent series resistance (ESR): 10 Ω or less
Input series resistance (RIN):
10 Ω or less
• The 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 and load current should not exceed the package power
dissipation.
• In determining output current, attention should be paid to the output current value specified and footnote *5
in Table 5 in the “ Electrical Characteristics”.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
• SII claims no responsibility for any and all disputes arising out of or in connection with any infringement by
products including this IC of patents owned by a third party.
14
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Characteristics (Typical data)
1. Output Voltage (VOUT) vs. Output Current (IOUT) (When load current increases)
S-818A20A
S-818A30A
(Ta=25 °C)
(Ta=25 °C)
10 V
3.0
2.0
1.0
0.0
2.0
6 V
4 V
3 V
10 V
5 V
3.5 V
1.0
0.0
2.5 V
4 V
5 V
VIN=2.3 V
VIN=3.3 V
0
0.2
0.4
IOUT [A]
0.6
0.8
0
0.2
0.4
0.6
0.8
IOUT [A]
S-818A50A
Remark In determining necessary output current,
(Ta=25 °C)
8 V
6.0
5.0
4.0
3.0
2.0
1.0
0.0
consider the following parameters:
10 V
1. Output current value in the “ Electrical
Characteristics” and footnote *5.
7 V
6 V
2. Power dissipation of the package
5.5 V
VIN=5.3 V
0
0.2
0.4
0.6
0.8
IOUT [A]
2. Output voltage (VOUT) vs. Input voltage (VIN)
S-818A20A (Ta=25°C)
2.5
S-818A30A (Ta=25°C)
3.5
IOUT=10 A
µ
IOUT=10 A
µ
100 A
100 A
µ
µ
3.0
2.5
2.0
1.5
1mA
2.0
1.5
1.0
60mA
30mA
60mA
4
30mA
1mA
2
3
5
1
2
3
4
VIN(V)
VIN(V)
S-818A50A (Ta=25°C)
5.5
IOUT =10 A
µ
100 A
µ
1mA
5.0
4.5
4.0
60mA
30mA
4
5
6
7
VIN(V)
15
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
3. Maximum output current (IOUTmax) vs. Input voltage (VIN)
S-818A20A
S-818A30A
0.8
0.8
0.6
0.4
0.2
0.0
Ta=−40 °C
Ta=−40 °C
25 °C
85 °C
0.6
0.4
0.2
0.0
85 °C
25 °C
0
2
4
6
8
10
0
2
4
6
8
10
VIN [V]
VIN [V]
S-818A50A
Remark In determining necessary output current,
0.8
25 °C
consider the following parameters:
0.6
0.4
0.2
0.0
Ta=−40 °C
1. Output current value in the “ Electrical
Characteristics” and footnote *5.
85 °C
2. Power dissipation of the package
0
2
4
6
8
10
VIN [V]
4. Dropout voltage (Vdrop) vs. Output current (IOUT
)
S-818A20A
S-818A30A
2000
2000
85 °C
1500
1000
500
0
1500
85 °C
Ta=−40 °C
25 °C
1000
Ta=−40 °C
500
25 °C
0
0
100
200
IOUT [mA]
300
400
0
50
100 150 200 250 300
IOUT [mA]
S-818A50A
2000
1500
1000
500
0
85 °C
Ta=−40 °C
25 °C
0
100 200 300 400 500 600
IOUT [mA]
16
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
5. Output voltage (VOUT) vs. Ambient temperature (Ta)
S-818A20A S-818A30A
VIN=4 V, IOUT=30 mA
VIN=3 V, IOUT=30 mA
2.04
3.06
3.03
3.00
2.97
2.94
2.02
2.00
1.98
1.96
0
50
100
−50
0
50
100
−50
Ta [°C]
Ta [°C]
S-818A50A
VIN=6 V, IOUT=30 mA
5.10
5.05
5.00
4.95
4.90
0
50
100
−50
Ta [°C]
6. Line regulation (∆VOUT1) vs. Ambient temperature (Ta)
S-818A20A/S-818A30A/S-818A50A
VIN=VOUT(S)+0.5 ↔10 V, IOUT=30 mA
35
30
25
20
15
10
5
3 V
5 V
V
OUT=2 V
0
−50
0
50
100
Ta [°C]
7. Load regulation (∆VOUT3) vs. Ambient temperature (Ta)
S-818A20A/S-818A30A/S-818A50A
VIN=VOUT(S)+1 V, IOUT=10 µA↔80 mA
50
3 V
40
30
20
5 V
10
V
OUT=2 V
0
0
50
100
−50
Ta [°C]
17
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
8. Current consumption (ISS1) vs. Input voltage (VIN)
S-818A30A
S-818A20A
40
40
30
20
10
0
25°C
25°C
85°C
30
20
10
85°C
Ta=-40°C
Ta=-40°C
0
0
0
2
4
6
8
10
2
4
6
8
10
V(V)
VIN[V]
VIN[V]
S-818A50A
40
30
20
10
85°C
25°C
Ta=-40°C
0
0
2
4
6
8
10
V(V)
VIN[V
]
9. Threshold voltage of ON/OFF pin (VSH/VSL) vs. Input voltage (VIN)
S-818A20A S-818A30A
2.5
2.5
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
0.5
0.0
VSH
VSH
VSL
VSL
2
4
6
8
10
3
5
7
8
10
VIN [V]
VIN [V]
S-818A50A
2.5
2.0
1.5
1.0
0.5
0.0
VSH
VSL
5
6
8
9
10
VIN [V]
18
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
10. Ripple rejection
S-818A20A
VIN=3 V, IOUT=30 mA, CIN=None, COUT=2 µF, 0.5 V p-p, Ta=25 °C
0
−20
−40
−60
−80
−100
0.1
1
10
100
f [kHz]
S-818A30A
VIN=4 V, IOUT=30 mA, CIN=None, COUT=2 µF, 0.5 V p-p, Ta=25 °C
0
−20
−40
−60
−80
−100
0.1
1
10
100
f [kHz]
S-818A50A
VIN=6 V, IOUT=30 mA, CIN=None, COUT=2 µF, 0.5 V p-p, Ta=25 °C
0
−20
−40
−60
−80
−100
0.1
1
10
100
f [kHz]
19
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Transient Response Characteristics (S-818A30A, Typical data, Ta=25°C)
Input voltage
or
Load current
O vershoot
O utput voltage
U ndershoot
1. Power on
V =0 10V IOUT=30mA
→
IN
10V
0V
CL=4.7 F
µ
VIN
CL=2 F
µ
VOUT
0V
TIME(50usec/div)
Load dependence of overshoot
CL dependence of overshoot
VIN=0 V→VOUT(S)+1 V, CL=2 µF
VIN=0 V→VOUT(S)+1 V, IOUT =30 mA
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
5 V
V
OUT=2 V
3 V
5 V
3 V
V
OUT=2 V
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
1
10
CL [µF]
100
I
OUT [V]
V
DD dependence of overshoot
Temperature dependence of overshoot
VIN=0 V→VDD, IOUT=30 mA, CL=2 µF
VIN=0 V→VOUT(S)+1 V, IOUT=30 mA, CL=2 µF
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
5 V
3 V
5 V
V
OUT=2 V
3 V
V
OUT=2 V
0
2
4
6
8
10
0
50
100
−50
VDD [V]
Ta [°C]
20
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
2. Shutdown control
V =10V ON/OFF=0 10V IOUT=30mA
→
IN
10V
0V
CL=4.7 F
µ
ON/OFF
CL=2 F
µ
VOUT
0V
TIME(50usec/div)
Load dependencies of overshoot
CL dependence of overshoot
VIN=VOUT(S)+1 V, CL=2 µF, ON/OFF=0 V→VOUT(S)+1 V
VIN=VOUT(S)+1 V, CL=2 µF, ON/OFF=0 V→VOUT(S)+1 V
1.0
1.0
5 V
0.8
0.8
0.6
0.4
0.2
0.0
V
OUT=2 V
3 V
0.6
5 V
3 V
OUT=2 V
0.4
V
0.2
0.0
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
1
10
CL [µF]
100
IOUT [A]
V
DD dependencies of overshoot
Temperature dependence of overshoot
VIN=VOUT(S)+1 V, IOUT=30 mA, CL=2 µF, ON/OFF=0 V→VOUT(S)+1 V
VIN=VDD, IOUT=30 mA, CL=2 µF, ON/OFF=0 V→VDD
1.0
1.0
5 V
3 V
0.8
0.8
0.6
0.4
0.2
0.0
V
OUT=2 V
5 V
0.6
0.4
3 V
0.2
V
OUT=2 V
0.0
50
100
−50
0
0
2
4
6
8
10
Ta [°C]
VDD [V]
21
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
3. Power fluctuation
V =10 4V IOUT=30mA
→
IN
V =4 10V IOUT=30mA
→
IN
10V
4V
10V
4V
VIN
VIN
CL=2 F
µ
VOUT
CL=4.7 F
CL=4.7 F
µ
µ
VOUT
3V
3V
CL=2 F
µ
TIME(50usec/div)
Load dependencies of overshoot
TIME(50usec/div)
CL dependence of overshoot
VIN=VOUT(S)+1 V→VOUT(S)+2 V, CL=2 µF
VIN=VOUT(S)+1 V→VOUT(S)+2 V, IOUT=30 mA
0.6
0.4
0.05
0.04
0.03
0.02
0.01
0
V
OUT=2 V
3 V
V
OUT=2 V
0.2
0
3 V
5 V
5 V
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
1
10
CL [µF]
100
IOUT [A]
V
DD dependencies of overshoot
Temperature dependence
VIN=VOUT(S)+1 V→VDD, IOUT=30 mA, CL=2 µF
VIN=VOUT(S)+1 V→VOUT(S)+2 V, IOUT=30 mA, CL=2 µF
0.06
0.6
3 V
3 V
0.05
0.04
0.03
0.02
0.01
0
V
OUT=2 V
0.4
V
4
OUT=2 V
5 V
0.2
0
5 V
50
0
2
6
8
10
0
100
−50
VDD [V]
Ta [°C]
22
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Load dependencies of undershoot
CL dependence of undershoot
VIN=VOUT(S)+2 V→VOUT(S)+1 V, CL=2 µF
VIN=VOUT(S)+2 V→VOUT(S)+1 V, IOUT=30 mA
0.3
0.2
0.1
0
0.05
5 V
0.04
3 V
0.03
V
OUT=2 V
V
OUT=2 V
0.02
0.01
0
3 V
5 V
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
1
10
100
IOUT [A]
DD dependencies of undershoot
VIN=VDD→VOUT(S)+1 V, IOUT=30 mA, CL=2 µF
0.2
CL [µF]
V
Temperature dependence of undershoot
VIN=VOUT(S)+2 V→VOUT(S)+1 V, IOUT=30 mA, CL=2 µF
0.06
5 V
0.05
0.04
0.03
0.02
0.01
0
0.15
3 V
V
OUT=2 V
3 V
0.1
0.05
0
V
OUT=2 V
5 V
0
2
4
6
8
10
0
50
100
−50
V
DD [V]
Ta [°C]
23
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
4. Load fluctuation
IOUT=10 A 30mA V =4V
µ →
IOUT=30mA 10 A V =4V
→ µ
IN
IN
30mA
10 A
µ
10 A
µ
IOUT
CL=2 F
IOUT
VOUT
µ
CL=2 F
µ
CL=4.7 F
µ
3V
3V
CL=4.7 F
µ
VOUT
TIME(50 sec/div)
µ
TIME(20msec/div)
Load current dependence of load fluctuation overshoot CL dependence of overshoot
VIN=VOUT(S)+1 V, CL=2 µF
VIN=VOUT(S),+1 V, IOUT=30 mA→10 µA
1.0
0.8
0.6
0.4
0.2
0.0
0.2
0.15
0.1
5 V
V
OUT=2 V
3 V
3 V
5 V
0.05
0
V
OUT=2 V
1.E−03
1.E−02 1.E−01 1.E+00
∆IOUT [A]
1
10
100
CL [µF]
Remark ∆IOUT shows larger load current at load current
fluctuation while smaller current is fixed to
10 µA. For example ∆IOUT=1.E−02 (A) means
load current fluctuation from 10 mA to 10 µA.
VDD dependencies of overshoot
Temperature dependence of overshoot
VIN=VDD, IOUT=30 mA→10 µA, CL=2 µF
VIN=VOUT(S)+1 V, IOUT=30 mA→10 µA, CL=2 µF
0.3
0.3
0.25
0.2
3 V
3 V
0.2
0.15
0.1
0.1
V
OUT=2 V
V
OUT=2 V
5 V
0.05
0
5 V
8
0
0
2
4
6
10
0
50
100
−50
V
DD [V]
Ta [°C]
24
Seiko Instruments Inc.
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
Load current dependence of load fluctuation undershoot CL dependence of undershoot
VIN=IOUT(S)+1 V, CL=2 µF
VIN=VOUT(S)+1 V, IOUT=10 µA→30 mA
1.0
0.8
0.6
0.4
0.2
0.0
0.4
0.3
0.2
0.1
0
3 V
3 V
5 V
5 V
V
OUT=2 V
V
OUT=2 V
1.E00
1.E−03
1.E−02 1.E−01
∆IOUT [A]
1
10
CL [µF]
100
Remark ∆IOUT shows larger load current at load current
fluctuation while smaller current is fixed to
10 µA. For example ∆IOUT=1.E−02 (A) means
load current fluctuation from 10 µA to 10 mA.
VDD dependence of undershoot
VIN=VDD, IOUT=10 µA→30 mA, CL=2 µF
0.4
Temperature dependence of undershoot
VIN=VOUT(S)+1 V, IOUT=10 µA→30 mA, CL=2 µF
0.5
3 V
3 V
V
OUT=2 V
0.4
0.3
0.2
0.1
0
0.3
0.2
V
OUT=2 V
0.1
0
5 V
5 V
0
2
4
6
8
10
−50
0
50
100
Ta [°C]
V
DD [V]
25
Seiko Instruments Inc.
2.9±0.2
1.9±0.2
4
5
+0.1
-0.06
1
2
3
0.16
0.95±0.1
0.4±0.1
No. MP005-A-P-SD-1.2
TITLE
SOT235-A-PKG Dimensions
MP005-A-P-SD-1.2
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
4.0±0.1(10 pitches:40.0±0.2)
+0.1
-0
2.0±0.05
0.25±0.1
ø1.5
+0.2
-0
4.0±0.1
ø1.0
1.4±0.2
3.2±0.2
3
4
2 1
5
Feed direction
No. MP005-A-C-SD-2.1
TITLE
SOT235-A-Carrier Tape
MP005-A-C-SD-2.1
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. MP005-A-R-SD-1.1
TITLE
SOT235-A-Reel
MP005-A-R-SD-1.1
No.
SCALE
UNIT
QTY.
3,000
mm
Seiko Instruments Inc.
4.5±0.1
1.6±0.2
1.5±0.1
5
4
1
2
3
1.5±0.1 1.5±0.1
0.4±0.05
0.3
0.4±0.1
0.4±0.1
45°
0.45±0.1
No. UP005-A-P-SD-1.1
TITLE
SOT895-A-PKG Dimensions
UP005-A-P-SD-1.1
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
4.0±0.1(10 pitches : 40.0±0.2)
+0.1
-0
ø1.5
2.0±0.05
+0.1
-0
0.3±0.05
2.0±0.1
8.0±0.1
ø1.5
5° max.
4.75±0.1
3
4
2
1
5
Feed direction
No. UP005-A-C-SD-1.1
TITLE
SOT895-A-Carrier Tape
UP005-A-C-SD-1.1
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
16.5max.
13.0±0.3
Enlarged drawing in the central part
(60°)
(60°)
No. UP005-A-R-SD-1.1
TITLE
SOT895-A-Reel
UP005-A-R-SD-1.1
No.
QTY.
SCALE
UNIT
1,000
mm
Seiko Instruments Inc.
·
·
The information described herein is subject to change without notice.
Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein
whose related industrial properties, patents, or other rights belong to third parties. The application circuit
examples explain typical applications of the products, and do not guarantee the success of any specific
mass-production design.
·
·
·
When the products described herein are regulated products subject to the Wassenaar Arrangement or other
agreements, they may not be exported without authorization from the appropriate governmental authority.
Use of the information described herein for other purposes and/or reproduction or copying without the
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installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc.
Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the
failure or malfunction of semiconductor products may occur. The user of these products should therefore
give thorough consideration to safety design, including redundancy, fire-prevention measures, and
malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.
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