S-T111B48MC-OHHTFG [SII]
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR; 高纹波抑制率低压差CMOS电压稳压器
| 型号： | S-T111B48MC-OHHTFG |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR |
| 文件： | 总23页 (文件大小：238K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Rev.2.1_00
HIGH RIPPLE-REJECTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
The S-T111 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 small SOT-23-5 package realizes high-
density mounting.
Features
1.5 V to 5.5 V, selectable in 0.1 V steps.
• Output voltage:
• High-accuracy output voltage:
• Low dropout voltage:
• Low current consumption:
±1.0%
190 mV typ. (3.0 V output product, IOUT = 100 mA)
During operation: 50 μA typ., 90 μA max.
During shutdown: 0.1 μA typ., 1.0 μA max.
150 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1
Ensures long battery life.
• High peak current capability:
• Built-in ON/OFF circuit:
• Low ESR capacitor can be used: A ceramic capacitor of 0.1 μF or more can be used for the output
capacitor.
80 dB typ. (at 1.0 kHz)
Overcurrent of output transistor can be restricted.
SOT-23-5
• High ripple rejection:
• Built-in overcurrent protector:
• Small package:
• Lead-free products
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
• Power supply for battery-powered devices
• Power supply for personal communication devices
• Power supply for home electric/electronic appliances
• Power supply for cellular phones
Package
Drawing Code
Package Name
Package
MP005-A
Tape
Reel
MP005-A
SOT-23-5
MP005-A
Seiko Instruments Inc.
1
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Block Diagram
*1
VIN
VOUT
Overcurrent
protector
+
−
ON/OFF
circuit
ON/OFF
Reference
voltage circuit
VSS
*1. Parasitic diode
Figure 1
2
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Product Code Structure
• The product types and output voltage for the S-T111 Series can be selected at the user’s request. Refer
to the “Product name” for the meanings of the characters in the product name and “Product name list”
for the full product names.
1. Product name
S-T111
x
xx
xx
–
xxx
TF
G
IC direction in tape specifications*1
Product name (abbreviation)*2
Package name (abbreviation)
MC: SOT-23-5
Output voltage
15 to 55
(e.g. when the output voltage is 1.5 V,
it is expressed as 15.)
Product type*3
A: ON/OFF pin negative logic
B: ON/OFF pin positive logic
*1. Refer to the taping specifications at the end of this book.
*2. Refer to the product name list.
*3. Refer to 3. Shutdown (ON/OFF pin) in the “ Operation”.
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
2. Product name list
Table 1
Output Voltage
1.5V±1.0%
1.6V±1.0%
1.7V±1.0%
1.8V±1.0%
1.9V±1.0%
2.0V±1.0%
2.1V±1.0%
2.2V±1.0%
2.3V±1.0%
2.4V±1.0%
2.5V±1.0%
2.6V±1.0%
2.7V±1.0%
2.8V±1.0%
2.9V±1.0%
3.0V±1.0%
3.1V±1.0%
3.2V±1.0%
3.3V±1.0%
3.4V±1.0%
3.5V±1.0%
3.6V±1.0%
3.7V±1.0%
3.8V±1.0%
3.9V±1.0%
4.0V±1.0%
4.1V±1.0%
4.2V±1.0%
4.3V±1.0%
4.4V±1.0%
4.5V±1.0%
4.6V±1.0%
4.7V±1.0%
4.8V±1.0%
4.9V±1.0%
5.0V±1.0%
5.1V±1.0%
5.2V±1.0%
5.3V±1.0%
5.4V±1.0%
5.5V±1.0%
Product Name
S-T111B15MC-OGATFG
S-T111B16MC-OGBTFG
S-T111B17MC-OGCTFG
S-T111B18MC-OGDTFG
S-T111B19MC-OGETFG
S-T111B20MC-OGFTFG
S-T111B21MC-OGGTFG
S-T111B22MC-OGHTFG
S-T111B23MC-OGITFG
S-T111B24MC-OGJTFG
S-T111B25MC-OGKTFG
S-T111B26MC-OGLTFG
S-T111B27MC-OGMTFG
S-T111B28MC-OGNTFG
S-T111B29MC-OGOTFG
S-T111B30MC-OGPTFG
S-T111B31MC-OGQTFG
S-T111B32MC-OGRTFG
S-T111B33MC-OGSTFG
S-T111B34MC-OGTTFG
S-T111B35MC-OGUTFG
S-T111B36MC-OGVTFG
S-T111B37MC-OGWTFG
S-T111B38MC-OGXTFG
S-T111B39MC-OGYTFG
S-T111B40MC-OGZTFG
S-T111B41MC-OHATFG
S-T111B42MC-OHBTFG
S-T111B43MC-OHCTFG
S-T111B44MC-OHDTFG
S-T111B45MC-OHETFG
S-T111B46MC-OHFTFG
S-T111B47MC-OHGTFG
S-T111B48MC-OHHTFG
S-T111B49MC-OHITFG
S-T111B50MC-OHJTFG
S-T111B51MC-OHKTFG
S-T111B52MC-OHLTFG
S-T111B53MC-OHMTFG
S-T111B54MC-OHNTFG
S-T111B55MC-OHOTFG
Remark Please contact our sales office for products with type A.
4
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Pin Configuration
Table 2
Symbol
ON/OFF
VSS
SOT-23-5
Top view
Pin No.
Description
Shutdown pin
GND pin
5
4
1
2
3
4
5
NC*1
VOUT
VIN
No connection
Output voltage pin
Input voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
1
2
3
Figure 2
Absolute Maximum Ratings
Table 3
(Ta = 25°C unless otherwise specified)
Item
Symbol
VIN
VON/OFF
VOUT
PD
Absolute Maximum Rating
VSS − 0.3 to VSS + 7
VSS − 0.3 to VIN + 0.3
VSS − 0.3 to VIN + 0.3
300 (When not mounted on board)
600*1
Unit
V
V
Input voltage
Output voltage
Power dissipation
V
mW
mW
°C
°C
Operating ambient temperature
Storage temperature
Topr
Tstg
−40 to +85
−40 to +125
*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.
700
600
500
400
300
200
100
0
100
150
50
0
Ambient Temperature (Ta) [°C]
Figure 3 Power Dissipation of Package (When Mounted on Board)
Seiko Instruments Inc.
5
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Electrical Characteristics
Table 4
(Ta = 25°C unless otherwise specified)
Test
Circuit
Item
Symbol
VOUT(E)
Conditions
Min.
Typ.
Max.
Unit
VOUT(S) VOUT(S) VOUT(S)
Output voltage*1
VIN = VOUT(S) + 1.0 V, IOUT = 30 mA
VIN ≥ VOUT(S) + 1.0 V
V
1
× 0.99
× 1.01
⎯
Output current*2
Dropout voltage*3
IOUT
150*5
⎯
Not specified
0.08
mA
V
3
1
1
1
1
1
1
1
Vdrop
IOUT = 50 mA
1.5 V ≤ VOUT(S) ≤ 2.7 V
2.8 V ≤ VOUT(S) ≤ 5.5 V
⎯
⎯
⎯
⎯
⎯
⎯
0.14
0.55
0.47
0.35
0.29
0.26
V
IOUT = 100 mA 1.5 V ≤ VOUT(S) ≤ 1.6 V
1.7 V ≤ VOUT(S) ≤ 1.8 V
1.9 V ≤ VOUT(S) ≤ 2.3 V
2.4 V ≤ VOUT(S) ≤ 2.7 V
2.8 V ≤ VOUT(S) ≤ 5.5 V
VOUT(S) + 0.5 V ≤ VIN ≤ 6.5 V,
IOUT = 30 mA
0.32
V
0.28
V
0.25
V
0.20
V
0.19
V
ΔVOUT1
ΔVIN•VOUT
Line regulation
Load regulation
⎯
⎯
⎯
⎯
0.05
12
0.2
40
⎯
% / V
mV
1
1
1
2
VIN = VOUT(S) + 1.0 V,
ΔVOUT2
1.0 mA ≤ IOUT ≤ 80 mA
VIN = VOUT(S) + 1.0 V, IOUT = 10 mA,
−40°C ≤ Ta ≤ 85°C
ΔVOUT
ΔTa•VOUT
Output voltage
±100
50
ppm /°C
μA
temperature coefficient*4
Current consumption
during operation
Current consumption
during shutdown
Input voltage
VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON,
no load
ISS1
90
VIN = VOUT(S) + 1.0 V, ON/OFF pin = OFF,
no load
ISS2
VIN
⎯
0.1
⎯
1.0
6.5
⎯
μA
V
2
⎯
4
⎯
2.0
1.5
Shutdown pin
input voltage “H”
Shutdown pin
input voltage “L”
Shutdown pin
input current “H”
Shutdown pin
VSH
VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ
VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ
VIN = 6.5 V, VON/OFF = 6.5 V
VIN = 6.5 V, VON/OFF = 0 V
⎯
V
VSL
ISH
⎯
−0.1
−0.1
⎯
⎯
⎯
0.3
0.1
0.1
⎯
V
4
4
4
5
3
μA
μA
dB
mA
ISL
⎯
input current “L”
VIN = VOUT(S) + 1.0 V, f = 1.0 kHz,
ΔVrip = 0.5 Vrms, IOUT = 30 mA
VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON,
VOUT = 0 V
RR
Ripple rejection
80
Short-circuit current
Ishort
⎯
200
⎯
*1. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage at the fixed load
The output voltage when fixing IOUT 30 mA) and inputting VOUT(S)
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop VIN1 (VOUT3 0.98)
OUT3 is the output voltage when VIN
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage.
(
=
+ 1.0 V
=
−
×
V
= VOUT(S) + 1.0 V and IOUT = 50 mA or IOUT = 100 mA.
*4. The change in temperature [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa • VOUT
ΔVOUT [mV /°C]*1 = VOUT(S)[V]*2
ΔTa
×
[ppm/°C]*3 ÷1000
*1. The change in temperature of the output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the
power dissipation of the package when the output current is large.
This specification is guaranteed by design.
6
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Test Circuits
1.
+
A
VIN
VOUT
VSS
+
V
ON/OFF
Set to
power ON
Figure 4
2.
A
VIN
VOUT
VSS
ON/OFF
Set to
VIN or GND
Figure 5
3.
+
VIN
VOUT
A
+
V
ON/OFF
VSS
Set to
power ON
Figure 6
4.
VOUT
VSS
VIN
+
+
RL
A
ON/OFF
V
Figure 7
5.
VIN
VOUT
VSS
+
V
ON/OFF
RL
Set to
Power ON
Figure 8
Seiko Instruments Inc.
7
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Standard Circuit
Output
Input
VIN
VOUT
*2
*1
ON/OFF
CL
CIN
VSS
GND
Single GND
*1. CIN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 0.1 μF or more can be used for CL.
Figure 9
Caution The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
Application Conditions
Input capacitor (CIN):
Output capacitor (CL):
ESR of output capacitor:
0.1 μF or more
0.1 μF or more
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.
Selection of Input and Output Capacitors (CIN, CL)
The S-T111 Series requires an output capacitor between the VOUT and VSS pins for phase compensation.
Operation is stabilized by a ceramic capacitor with an output capacitance of 0.1 μF or more in the entire
temperature range. However, when using an OS capacitor, tantalum capacitor, or aluminum electrolytic
capacitor, a ceramic capacitor with a capacitance of 0.1 μF or more and an ESR of 10 Ω or less is required.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on the application.
The recommended value for an application is 1.0 μF or more for CIN and 0.47 μF or more for CL; however,
when selecting the output capacitor, perform sufficient evaluation, including evaluation of temperature
characteristics, on the actual device.
8
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Explanation of Terms
1. Low dropout voltage regulator
The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in
low on-resistance transistor.
2. Low ESR
A capacitor whose ESR (Equivalent Series Resistance) is low. The S-T111 Series enables use of a low
ESR capacitor, such as a ceramic capacitor, for the output-side capacitor CL. A capacitor whose ESR is
10 Ω or less can be used.
3. Output voltage (VOUT
)
The accuracy of the output voltage is ensured at ±1.0% under the specified conditions of fixed input
voltage*1, fixed output current, and fixed temperature.
*1. Differs depending on the product.
Caution If the above conditions change, the output voltage value may vary and exceed the
accuracy range of the output voltage. Please see the “Electrical Characteristics” and
attached characteristics data for details.
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
ΔVOUT1
4. Line Regulation
ΔVIN • VOUT
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much
the output voltage changes due to a change in the input voltage with the output current remaining
unchanged.
5. Load regulation (ΔVOUT2
)
Indicates the dependency of the output voltage on the output current. That is, the values show 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, which is the input voltage (VIN) at the point where
the output voltage has fallen to 98% of the output voltage value VOUT3 after VIN was gradually decreased
from VIN = VOUT(S) + 1.0 V, and the output voltage at that point (VOUT3 × 0.98).
Vdrop = VIN1 − (VOUT3 × 0.98)
Seiko Instruments Inc.
9
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
ΔVOUT
7. Temperature Coefficient of Output Voltage
ΔTa • VOUT
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.
Ex. S-T111B28 Typ.
VOUT
[V]
+0.28 mV/°C
*1
VOUT(E)
−0.28 mV/°C
−40
25
Ta [°C]
85
*1. VOUT(E) is the value of the output voltage measured at 25°C.
Figure 10
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa
ΔVOUT
ΔTa • VOUT
*2
*3
[
mV/°C
]
*1 = VOUT(S)
[
V
]
×
[
ppm/°C
]
÷1000
*1. Change in temperature of output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
10
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Operation
1. Basic operation
Figure 11 shows the block diagram of the S-T111 Series.
The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistance-
divided by feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage necessary
to ensure a certain output voltage free of any fluctuations of input voltage and temperature.
VIN
*1
Current
supply
Error
amplifier
VOUT
−
+
Vref
Rf
Vfb
Reference voltage
circuit
Rs
VSS
Parasitic diode
*1.
Figure 11
2. Output transistor
The S-T111 Series uses a low on-resistance 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 damaged due
to inverse current flowing from the VOUT pin through a parasitic diode to the VIN pin.
Seiko Instruments Inc.
11
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
3. Shutdown pin (ON/OFF pin)
This pin starts and stops the regulator.
When the ON/OFF pin is set to the shutdown level, the operation of all internal circuits stops, and the built-
in P-channel MOS FET output transistor between the VIN pin and VOUT pin is turned off to substantially
reduce the current consumption. The VOUT pin becomes the VSS level due to the internally divided
resistance of several MΩ between the VOUT pin and VSS pin.
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 internally, do not use it in the floating state. In addition, note that the 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 VSS pin if the logic type is “A” and to the VIN pin if it is “B”.
Table 5
Logic Type
ON/OFF Pin
“L”: Power on
“H”: Power off
“L”: Power off
“H”: Power on
Internal Circuits
Operating
Stopped
VOUT Pin Voltage
Set value
Current Consumption
A
A
B
B
ISS1
ISS2
ISS2
ISS1
VSS level
Stopped
VSS level
Operating
Set value
VIN
ON/OFF
VSS
Figure 12
12
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Precautions
• Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low.
When mounting an output capacitor between the VOUT and VSS pins (CL) and a capacitor for stabilizing
the input between VIN and VSS pins (CIN), the distance from the capacitors to these pins should be as
short as possible.
• Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or
less).
• Generally a series regulator 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 evaluation of temperature characteristics.
Input capacitor (CIN):
Output capacitor (CL):
1.0 μF or more
0.47 μF or more
Equivalent series resistance (ESR): 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 an input capacitor is not connected.
• The application conditions for the input voltage, output voltage, and load current should not exceed the
package power dissipation.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
• In determining the output current, attention should be paid to the output current value specified in Table
4 in the “ Electrical Characteristics” and footnote *5 of the table.
• SII claims no responsibility for any disputes arising out of or in connection with any infringement by
products including this IC of patents owned by a third party.
Seiko Instruments Inc.
13
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Typical Characteristics
(1) Output Voltage vs. Output current (when load current increases)
S-T111B15 (Ta = 25°C)
S-T111B30 (Ta = 25°C)
1.8
1.6
1.4
1.2
3.5
3.0
2.5
6.5 V
VIN = 3.3 V
2.0
1.0
VIN = 1.8 V
6.5 V
0.8
0.6
0.4
0.2
0
1.5
1.0
0.5
0
4.0 V
500
2.5 V
500
0
100
200
300
400
600
0
100
200
300
400
600
IOUT [mA]
IOUT [mA]
S-T111B50 (Ta = 25°C)
6
5
4
VIN = 5.3 V
3
Remark In determining the output current, attention
should be paid to the following.
6.0 V
2
1
0
6.5 V
300
1) The minimum output current value
and footnote *5 in the “ Electrical
Characteristics”
600
0
100
200
400
500
2) The package power dissipation
IOUT [mA]
(2) Output voltage vs. Input voltage
S-T111B15 (Ta = 25°C)
S-T111B30 (Ta = 25°C)
1.6
1.5
1.4
3.1
3.0
2.9
IOUT = 1 mA
IOUT 1 mA
=
1.3
2.8
2.7
2.6
2.5
30 mA
30 mA
50 mA
1.2
50 mA
1.1
1.0
1.0
1.5
2.0
VIN [V]
2.5
3.0
3.5
2.5
3.0
3.5
4.0
4.5
5.0
VIN [V]
S-T111B50 (Ta = 25°C)
5.5
5.0
4.5
IOUT = 1 mA
4.0
50 mA
5.0
3.5
30 mA
3.0
2.5
2.0
3.0
4.0
6.0
7.0
VIN [V]
14
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
(3) Dropout voltage vs. Output current
S-T111B15
S-T111B30
0.45
0.40
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
85°C
25°C
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
85°C
25°C
–40°C
–40°C
0
0
50
100
150
200
0
50
100
150
200
IOUT [mA]
IOUT [mA]
S-T111B50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
85°C
25°C
–40°C
0
0
50
100
150
200
IOUT [mA]
(4) Dropout voltage vs. Set output voltage
0.40
0.35
150 mA
100 mA
0.30
0.25
0.20
0.15
0.10
0.05
0
50 mA
30 mA
10 mA
7
0
1
2
3
4
5
6
VOTA [V]
Seiko Instruments Inc.
15
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
(5) Output voltage vs. Ambient temperature
S-T111B15
S-T111B30
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
1.60
1.55
1.50
1.45
1.40
–50 –25
0
25
50
75
100
–50 –25
0
25
50
75
100
Ta [°C]
Ta [°C]
S-T111B50
5.3
5.2
5.1
5.0
4.9
4.8
4.7
–50 –25
0
25
50
75
100
Ta [°C]
(6) Current consumption vs. Input voltage
S-T111B15
S-T111B30
120
100
80
120
100
80
25°C
–40°C
85°C
25°C
60
40
20
0
60 85°C
40
–40°C
20
0
6
8
0
2
4
6
8
0
2
4
VIN [V]
VIN [V]
S-T111B50
120
100
80
25°C
–40°C
60
40
20
0
85°C
0
2
4
6
8
VIN [V]
16
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
(7) Ripple rejection
S-T111B15 (Ta = 25°C)
S-T111B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 0.47 μF
VIN = 4.0 V, COUT = 0.47 μF
100
100
50 mA
50 mA
80
80
IOUT = 1 mA
IOUT = 1 mA
30 mA
60
40
20
0
60
40
20
0
30 mA
100
1k
10k
100k
1M
10
100
10k
Frequency [Hz]
1M
10
1k
100k
Frequency [Hz]
S-T111B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 0.47 μF
100
80
50 mA
60
IOUT = 1 mA
30 mA
40
20
0
10
100
1k
10k
100k
1M
Frequency [Hz]
Seiko Instruments Inc.
17
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
Reference Data
(1) Input transient response characteristics
S-T111B15 (Ta = 25°C)
IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 0.47 μF, CIN = 0 μF
S-T111B30 (Ta = 25°C)
IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 0.47 μF, CIN = 0 μF
1.62
1.60
1.58
1.56
1.54
1.52
1.50
1.48
1.46
3.08
6
5
4
3
2
1
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
3.06
VIN
3.04
VIN
3.02
VOUT
3.00
VOUT
2.98
2.96
1600
-40 -20
0
20 40 60 80 100 120 140 160
-40 -20
0
20 40 60 80 100 120 140
t [μs]
t [μs]
S-T111B50 (Ta = 25°C)
IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 0.47 μF, CIN = 0 μF
5.12
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
8
7
6
5
4
3
2
1
0
VIN
VOUT
-40 -20
0
20 40 60 80 100 120 140 160
t [μs]
(2) Load transient response characteristics
S-T111B15 (Ta = 25°C)
S-T111B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 0.47 μF, CIN = 1.0 μF, IOUT = 50↔100 mA
VIN = 4.0 V, COUT = 0.47 μF, CIN = 1.0 μF, IOUT = 50↔100 mA
150
150
100
50
1.70
1.65
1.60
1.55
1.50
1.45
1.40
3.20
100
3.15
IOUT
IOUT
50
3.10
0
0
3.05
3.00
2.95
2.90
VOUT
VOUT
–50
–50
–100
–150
–100
–150
-40 -20
0
20 40 60 80 100 120 140 160
-40 -20
0
20 40 60 80 100 120 140 160
t [μs]
t [μs]
S-T111B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 0.47 μF, CIN = 1.0 μF, IOUT = 50↔100 mA
150
100
50
5.20
5.15
5.10
5.05
5.00
4.95
4.90
IOUT
0
VOUT
–50
–100
–150
-40 -20
0
20 40 60 80 100 120 140 160
t [μs]
18
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-T111 Series
Rev.2.1_00
(3) Shutdown pin transient response characteristics
S-T111B15 (Ta = 25°C)
S-T111B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 0.47 μF, CIN = 1.0 μF, IOUT = 100 mA
VIN = 4.0 V, COUT = 0.47 μF, CIN = 1.0 μF, IOUT = 100 mA
5
4
3
10
8
6
2
4
VON/OFF
VON/OFF
3
1
6
2
2
0
4
2
0
1
–1
–2
–3
–2
–4
–6
VOUT
VOUT
0
0
–1
–2
-0.4 -0.2
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
-0.4 -0.2
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
t [ms]
t [ms]
Seiko Instruments Inc.
19
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.
·
·
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
express permission of Seiko Instruments Inc. is strictly prohibited.
The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus
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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