S-812C50BMC-C5E-T2 [SII]
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR; 高工作电压CMOS电压稳压器
| 型号： | S-812C50BMC-C5E-T2 |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR |
| 文件： | 总26页 (文件大小：329K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Rev.1.0
HIGH OPERATING VOLTAGE
CMOS VOLTAGE REGULATOR
S-812C Series
The S-812C series is a family of high-voltage positive
regulators developed using CMOS technology.
The
maximum operating voltage of 16V makes the S-812C
series best in high-voltage applications. Not only current
consumption is small but also power-off function is
included, the regulator is also suitable in constructing low-
power portable devices. Combination of power-off function
and short-current protection can be selected.
Features
• Low current consumption
Applications
• Power source for battery-powered devices
Operating current: Typ. 1.0 µA, Max. 1.8 µA (3.0 V)
• Output voltage: 2.0 to 6.0 V (0.1 V step)
• Output voltage accuracy: ±2.0%
• Power source for personal communication
devices
• Power source for home electric/electronic
• Output current:
appliances
50mA capable (3.0 V output product, VIN=5 V) Note1
75mA capable (5.0 V output product, VIN=7 V) Note1
• Dropout voltage
Typ. 120 mV (VOUT = 5.0 V, IOUT = 10 mA)
• Power-off function: Polarity for power-off switch or removal of the power-off function can be selected.
• Short-circuit protection: Product with/without short-circuit protection is available.
Short-circuited current : 40 mA typ. for products with protection
• Packages: SOT-23-5 (Package drawing code : MP005-A)
SOT-89-5 (Package drawing code : UP003-A)
SOT-89-3 (Package drawing code : UP005-A)
TO-92
(Package drawing code : YF003-A)
Note1 Power dissipation of the package should be taken into account when the output current is large.
Block Diagram
(1) Product without power-off function
VIN
(2) Product with power-off function
VIN
(1)
(1)
VOUT
VOUT
(2)
Short-circuit
protection
(2)
Short-circuit
protection
ON/OFF
Reference
voltage
Reference
voltage
VSS
(1) : Parasitic diode
(2) : In case of a product with short-circuit protection
VSS
(1) : Parasitic diode
(2) : In case of a product with short-circuit protection
Figure 1 Block Diagram
Seiko Instruments Inc.
1
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
Absolute Maximum Ratings
Table 1
(Ta=25°C unless otherwise specified)
Item
Symbol
VIN
Absolute Maximum Rating
18
Units
V
Input voltage
VON/OFF
VOUT
PD
VSS-0.3 to 18
V
Output voltage
VSS-0.3 to VIN+0.3
V
Power dissipation
250(SOT-23-5),500 (SOT-89-5)
500(SOT-89-3),400(TO-92)
-40 to +85
mW
Operating temperature range
Storage temperature range
Topr
Tstg
°C
°C
-40 to +125
Note: Although the IC contains protection circuit against static electricity, excessive static electricity
or voltage which exceeds the limit of the protection circuit should not be applied to.
Selection Guide
Product Name
S-812C xx Axx - xxx - T2
IC orientation for taping specifications
Product code
Package code
MC: SOT-23-5
UA: SOT-89-3
Y : TO-92
UC: SOT-89-5
WI: WAFER
Function
A: No short-circuit protection and no power-off function
B: Short-circuit protection and power-off function
ON/OFF pin; Positive logic
Output voltage x 10
Table 2.1 Selection Guide
S-812CxxB series (Short-circuit protection and power-off fuction)
Output Voltage
2.0 V ± 2.0%
3.0 V ± 2.0%
3.3 V ± 2.0%
3.5 V ± 2.0%
3.8 V ± 2.0%
4.0 V ± 2.0%
5.0 V ± 2.0%
SOT-23-5
SOT-89-5
−
−
−
−
−
−
−
−
S-812C30BMC-C4K-T2
−
−
−
−
S-812C50BMC-C5E-T2
Please contact our sales office for products with an output voltage not listed above.
2
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Table 2.2
S-812CxxA series (No short-circuit protection and no power-off function)
Output voltage
SOT-23-5
SOT-89-3
TO-92*
SOT-89-5
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%
S-812C20AMC-C2A-T2
S-812C21AMC-C2B-T2
S-812C22AMC-C2C-T2
S-812C23AMC-C2D-T2
S-812C24AMC-C2E-T2
S-812C25AMC-C2F-T2
S-812C26AMC-C2G-T2
S-812C27AMC-C2H-T2
S-812C28AMC-C2I-T2
S-812C29AMC-C2J-T2
S-812C30AMC-C2K-T2
S-812C31AMC-C2L-T2
S-812C32AMC-C2M-T2
S-812C33AMC-C2N-T2
S-812C34AMC-C2O-T2
S-812C35AMC-C2P-T2
S-812C36AMC-C2Q-T2
S-812C37AMC-C2R-T2
S-812C38AMC-C2S-T2
S-812C39AMC-C2T-T2
S-812C40AMC-C2U-T2
S-812C41AMC-C2V-T2
S-812C42AMC-C2W-T2
S-812C43AMC-C2X-T2
S-812C44AMC-C2Y-T2
S-812C45AMC-C2Z-T2
S-812C46AMC-C3A-T2
S-812C47AMC-C3B-T2
S-812C48AMC-C3C-T2
S-812C49AMC-C3D-T2
S-812C50AMC-C3E-T2
S-812C51AMC-C3F-T2
S-812C52AMC-C3G-T2
S-812C53AMC-C3H-T2
S-812C54AMC-C3I-T2
S-812C55AMC-C3J-T2
S-812C56AMC-C3K-T2
S-812C20AUA-C2A-T2
S-812C21AUA-C2B-T2
S-812C22AUA-C2C-T2
S-812C23AUA-C2D-T2
S-812C24AUA-C2E-T2
S-812C25AUA-C2F-T2
S-812C26AUA-C2G-T2
S-812C27AUA-C2H-T2
S-812C28AUA-C2I-T2
S-812C29AUA-C2J-T2
S-812C30UA-C2K-T2
S-812C31AUA-C2L-T2
S-812C32AUA-C2M-T2
S-812C33AUA-C2N-T2
S-812C34AUA-C2O-T2
S-812C35AUA-C2P-T2
S-812C36AUA-C2Q-T2
S-812C37AUA-C2R-T2
S-812C38AUA-C2S-T2
S-812C39AUA-C2T-T2
S-812C40AUA-C2U-T2
S-812C41AUA-C2V-T2
S-812C42AUA-C2W-T2
S-812C43AUA-C2X-T2
S-812C44AUA-C2Y-T2
S-812C45AUA-C2Z-T2
S-812C46AUA-C3A-T2
S-812C47AUA-C3B-T2
S-812C48AUA-C3C-T2
S-812C49AUA-C3D-T2
S-812C50AUA-C3E-T2
S-812C51AUA-C3F-T2
S-812C52AUA-C3G-T2
S-812C53AUA-C3H-T2
S-812C54AUA-C3I-T2
S-812C55AUA-C3J-T2
S-812C56AUA-C3K-T2
S-812C57AUA-C3L-T2
S-812C58AUA-C3M-T2
S-812C59AUA-C3N-T2
S-812C60AUA-C3O-T2
S-812C20AY-X
S-812C21AY-X
S-812C22AY-X
S-812C23AY-X
S-812C24AY-X
S-812C25AY-X
S-812C26AY-X
S-812C27AY-X
S-812C28AY-X
S-812C29AY-X
S-812C30AY-X
S-812C31AY-X
S-812C32AY-X
S-812C33AY-X
S-812C34AY-X
S-812C35AY-X
S-812C36AY-X
S-812C37AY-X
S-812C38AY-X
S-812C39AY-X
S-812C40AY-X
S-812C41AY-X
S-812C42AY-X
S-812C43AY-X
S-812C44AY-X
S-812C45AY-X
S-812C46AY-X
S-812C47AY-X
S-812C48AY-X
S-812C49AY-X
S-812C50AY-X
S-812C51AY-X
S-812C52AY-X
S-812C53AY-X
S-812C54AY-X
S-812C55AY-X
S-812C56AY-X
S-812C57AY-X
S-812C58AY-X
S-812C59AY-X
S-812C60AY-X
*: X changes according to the packing form in TO-92. Standard forms are B; Bulk and Z; Zigzag (tape and ammo).
If tape and reel (T) is needed, please contact SII sales office.
Seiko Instruments Inc.
3
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
Pin Configuration
For details of package, refer to the attached drawing.
Table 3 Pin Assignment
SOT-23-5
Top view
Pin No.
Symbol
VSS
Description
GND pin
1
2
3
4
5
5
4
VIN
Input voltage pin
VOUT
N.C. (1)
ON/OFF
N.C. (1)
Output voltage pin
ON/OFF pin
(1) N.C. pin is electrically open. N.C. pin can be connected to
VIN or VSS. The ON/OFF pin becomes N.C. pin, when the
power-off function is removed.
2
3
1
Figure 2
Table 4 Pin Assignment
SOT-89-5
Top view
Pin No.
Symbol
Description
1
2
3
4
VOUT Output voltage pin
4
5
VIN
Input voltage pin
GND pin
VSS
ON/OFF. ON/OFF pin
N.C. (1)
5
N.C. (1)
(1) N.C. pin is electrically open. N.C. pin can be connected to
VIN or VSS. The ON/OFF pin becomes N.C. pin, when the
power-off function is removed.
1
3
2
Figure 3
Table 5 Pin Assignment
SOT-89-3
Top view
Pin No.
Symbol
VSS
Description
GND pin
1
2
3
VIN
Input voltage pin
VOUT
Output voltage pin
1
2
3
Figure 4
Table 6 Pin Assignment
Pin No.
Symbol
VSS
Description
1
2
3
GND pin
VIN
Input voltage pin
Output voltage pin
TO-92
Bottom view
VOUT
1
2
3
Figure 5
4
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Electrical Characteristics
1. S-812C Series
Table 7 Electrical Characteristics
Conditions
(Ta=25°C unless otherwise specified)
Test
circuits
Parameter
Output voltage
Symbol
Min.
Typ.
Max.
Units
V
1)
2)
VOUT(E) VIN=VOUT(S)+2V, IOUT=10mA
VOUT(S)× VOUT(S) VOUT(S)
1
0.98
30
50
65
75
−
−
−
−
−
× 1.02
−
Output current
IOUT
VOUT(S)+2V2.0V ≤ VOUT(S) ≤ 2.9V
−
−
−
−
0.46
0.32
0.23
0.19
0.16
0.14
0.12
0.11
5
mA
mA
mA
mA
V
V
V
V
V
3
3
3
3
1
1
1
1
1
1
1
1
1
≤ VIN≤16V 3.0V ≤ VOUT(S) ≤ 3.9V
4.0V ≤ VOUT(S) ≤ 4.9V
−
−
−
5.0V ≤ VOUT(S) ≤ 5.9V
0.95
0.68
0.41
0.35
0.30
0.27
0.25
0.23
20
Dropout voltage
3)
Vdrop
IOUT
10mA
=
2.0V ≤ VOUT(S) ≤ 2.4V
2.5V ≤ VOUT(S) ≤ 2.9V
3.0V ≤ VOUT(S) ≤ 3.4V
3.5V ≤ VOUT(S) ≤ 3.9V
4.0V ≤ VOUT(S) ≤ 4.4V
4.5V ≤ VOUT(S) ≤ 4.9V
5.0V ≤ VOUT(S) ≤ 5.4V
5.5V ≤ VOUT(S) ≤ 6.0V
V
V
V
−
−
−
−
Line regulation 1
Line regulation 2
Load regulation
∆ VOUT11 VOUT(S) + 1 V ≤ VIN ≤ 16 V,
IOUT = 1mA
∆ VOUT21 VOUT(S) + 1 V ≤ VIN ≤ 16 V,
IOUT = 1µA
mV
−
−
−
−
−
5
20
30
45
65
80
−
mV
mV
mV
mV
mV
ppm
1
1
1
1
1
1
∆ VOUT31 VIN=
2.0V ≤ VOUT(S) ≤ 2.9V,
6
VOUT(S)+ 2 V 1µA ≤ IOUT ≤ 20mA
3.0V ≤ VOUT(S) ≤ 3.9V,
1µA ≤ IOUT ≤ 30mA
4.0V ≤ VOUT(S) ≤ 4.9V,
1µA ≤ IOUT ≤ 40mA
5.0V ≤ VOUT(S) ≤ 5.9V,
1µA ≤ IOUT ≤ 50mA
10
13
17
Output voltage temperature
coefficient
Current consumption
∆V
OUT
1 VIN = VOUT(S) + 1 V, IOUT = 10mA
±
100
OUT
°
=
≤
≤
°
°
4)
∆Ta • V
-40 C Ta 85 C
VIN 2.0V ≤ VOUT(S) ≤ 2.7V
VOUT(S)+2V, 2.8V ≤ VOUT(S) ≤ 3.7V
/ C
µA
µA
µA
µA
V
ISS
−
0.9
1.0
1.2
1.5
−
1.6
1.8
2.1
2.5
16
2
2
2
2
1
no load
3.8V ≤ VOUT(S) ≤ 5.1V
5.2V ≤ VOUT(S) ≤ 6.0V
Input voltage
Applied to products with Power-off Function
Current consumption at power-
off
ON/OFF pin
Input voltage for high level
ON/OFF pin
Input voltage for low level
ON/OFF pin
Input current at high level
ON/OFF pin
VIN
−
−
ISS2
VIN = VOUT(S) + 2V,
0.1
−
0.5
−
µA
V
2
4
4
4
4
VON/OFF = 0V, no load
VIN = VOUT(S) + 2V, RL = 1kχ,
judged by VOUT output level
VIN = VOUT(S) + 2V, RL = 1kΩ,
judged by VOUT output level
VIN=VOUT(S) + 2V,
VSH
VSL
ISH
2.0
−
−
0.4
0.1
-0.1
V
−
−
µA
µA
VON/OFF = 7V
ISL
VIN=VOUT(S) + 2V,
−
−
Input current at low level
VON/OFF = 0V
Applied to products with Short-circuit Protection
Short-circuit current
IOS
VIN = VOUT(S) + 2 V,
VOUT pin = 0 V
−
40
−
mA
3
1) VOUT(S)=Specified output voltage
VOUT(E)=Effective output voltage, i.e., the output voltage when fixing IOUT(=10 mA) and inputting VOUT(S)+2.0 V.
2) Output current at which output voltage becomes 95% of VOUT(E) after gradually increasing output current.
3) Vdrop = VIN1-(VOUT(E) × 0.98), where VIN1 is the Input voltage at which output voltage becomes 98% of VOUT(E) after
gradually decreasing input voltage.
4) Temperature change ratio for the output voltage [mV/°C] is calculated using the following equation.
∆
OUT
∆
OUT
V
V
°
=
OUT
V
×
° ÷
ppm/ C 1000
mV/ C
(S) V
[ ]
[
]
[
]
∆
∆
•
OUT
Ta
Ta V
Temperature change ratio for output voltage
Specified output voltage
Output voltage temperature coefficient
Seiko Instruments Inc.
5
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
Rev.1.0
S-812C Series
Test Circuits
3.
2.
VIN
VOUT
A
VIN
VOUT
A
(ON/OFF)*
VSS
V
(ON/OFF)*
VSS
VIN or GND
Set power ON
3.
4.
VIN
VOUT
VOUT
VIN
(ON OFF)*
A
RL
/
V
V
(ON/OFF)*
A
VSS
VSS
Set power ON
Figure 6 Test Circuits
Standard Circuit
OUTPUT
INPUT
VIN
VOUT
In addition to a tantalum capacitor, a ceramic
capacitor can be used for CL. See terms below.
CIN is a capacitor used to stabilize input.
→
(ON/OFF)
VSS
CL
CIN
GND
One point GND
Figure 7 Standard Circuit
Terms
1. Output capacitors (CL)
Output capacitors are generally used to stabilize regulation operation and to improve transient response
characteristics. But the S-812C series can provide stable operation without output capacitors. Capacitors
are used only to improve transient response characteristics. Output capacitors can hence be removed in
applications in which transient response can be negligible. When an output capacitor is used, a low ESR
(Equivalent Series Resistance) capacitor like ceramic capacitor can also be used.
2. Output voltage (VOUT
)
The accuracy of the output voltage is ± 2.0% guaranteed under the specified conditions for input voltage,
which differs depending upon the product items, output current, and temperature.
Note: If the above conditions change, the output voltage value may vary and go out of the accuracy range
of the output voltage. See the electrical characteristics and characteristics data for details.
3. Line regulations 1 and 2 (∆VOUT1, ∆VOUT2
)
These parameters indicate the input voltage dependence on the output voltage. That is, the values show
how much the output voltage changes due to a change in the input voltage with the output current remained
unchanged.
4. Load regulation (∆VOUT3
)
This parameter indicates the output current dependence on the output voltage. That is, the value shows how
much the output voltage changes due to a change in the output current with the input voltage remained
unchanged.
6
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
5. Dropout voltage (Vdrop)
This parameter indicates the difference between the input voltage (VIN1) and the output voltage when output
voltage falls to 98 % of VOUT (E) by gradually decreasing the input voltage (VIN).
Vdrop = VIN1-[VOUT(E) × 0.98]
6. Temperature coefficient of output voltage [∆VOUT/(∆Ta • VOUT)]
The output voltage lies in the shaded area in the whole operating temperature shown in figure 8 when the
temperature coefficient of the output voltage is ±100 ppm/°C.
VOUT
[V]
+0.30mV/ C
°
VOUT (E) is a measured value of
output voltage at 25°C.
V
OUT(E)
-0.30mV/ C
°
-40
Figure 8 Example for the S-812C30A
Temperature change ratio for output voltage [mV/°C] is calculated by using the following equation.
25
Ta [ C]
°
85
∆
OUT
∆
OUT
V
V
mV/°C = VOUT(S) V ×
[ ]
ppm/°C ÷1000
[
]
[
]
∆
∆
•
OUT
Ta
Ta V
Specified output voltage
Temperatures change ratio for output voltage
Output voltage temperature coefficient
Description of Operation
VIN
*
1. Basic operation
Current
source
Figure 9 shows the block diagram of the S-812C
series.
Error amplifier
The error amplifier compares a reference voltage
VOUT
Vref
V
ref
with a part of the output voltage divided by the
Rf
feedback resistors Rs and Rf, and supplies the gate
voltage to the output transistor, necessary to ensure
certain output voltage independent from change of
input voltage and temperature.
Reference
voltage
Rs
VSS
* : Parasitic diode
Figure 9 Block Diagram
2. Output transistor
The S-812C Series uses a Pch MOS transistor as the output transistor.
The voltage at VOUT must not exceed VIN+0.3V. When the VOUT voltage becomes higher than that of VIN,
reverse current flows and may break the regulator since a parasitic diode between VOUT and VIN exists
inevitably.
Seiko Instruments Inc.
7
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
3. Power-off function (ON/OFF pin)
The ON/OFF pin controls the start and stop of the regulation operation.
When the ON/OFF pin is set to power-off level, halting whole internal circuit and turning off the Pch MOSFET
between VIN and VOUT, current consumption is drastically reduced. The voltage of the VOUT pin becomes
VSS level due to the internal resistance divider of several MΩ between VOUT and VSS.
The ON/OFF pin should not be left afloat since no pull-up nor pull-down is made internally as shown in figure
10. Note that the current consumption increases if a voltage between 0.3V and VIN-0.3V is applied to the
ON/OFF pin. When the power-off function is not used, connect the pin to the VIN pin in case of positive logic
and to the VSS pin in case of negative logic.
VIN
Table 8 Power-off function
ON/OFF
Product
type
ON/OFF pin
Internal
circuit
VOUT pin
voltage
Current
consumption
B
B
“H” : Power on
“L” : Power off
Operate
Halt
Set value
VSS level
Iss
Iss2
VSS
Figure 10
When a regulation operation at light load less than 100uA is halted, output voltage
may increase. If the increase of the output voltage should be avoided, pull down the VOUT pin to the VSS level
as soon as ON/OFF pin goes to the power-down level.
4. Short-circuit protection
Installation of the short-circuit protection which protects the output transistor against short-circuit between
VOUT and VSS can be selected in the S-812C series. The short-circuit protection controls output current as
shown in the typical characteristics, (1) OUTPUT VOLTAGE versus OUTPUT CURRENT, and suppresses
output current at about 40 mA even if VOUT and VSS pins are short-circuited.
The short-circuit protection can not at the same time be a thermal protection. Attention should be paid to the
Input voltage and the load current under the actual condition so as not to exceed the power dissipation of the
package including the case for short-circuit.
When the output current is large and the difference between input and output voltage is large even if not
shorted, the short-circuit protection may work and the output current is suppressed to the specified value.
Products without short-circuit protection can provide comparatively large current by removing a short-circuit
protection.
Selection of External Components
Output Capacitor (CL)
The S-812C series can provide stable operation without output capacitor (CL) since the regulator has an
internal phase compensation circuit to stabilize operation when the load changes. The transient response of
the regulator, however, changes with the output capacitor and the magnitude of overshoot and undershoot on
output voltage accordingly changes. Please refer to CL dependence data in “Transient Response
Characteristics” to select suitable value for the capacitor. .
When a tantalum or an aluminum electrolytic capacitor is used, the ESR of the capacitor shall be 10Ω or less.
When an aluminum electrolytic capacitor is used attention should be especially paid to since the ESR of the
aluminum electrolytic capacitor increases at low temperature and possibility of oscillation becomes large.
Sufficient evaluation including temperature characteristics is indispensable.
8
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Application Circuits
1. Output Current Boost Circuit
As shown in Figure 11, the output current
can be boosted by externally attaching a
Tr1
PNP transistor.
The S-812C controls the
VOUT
VOUT
S-812C
Series
VIN
base current of the PNP transistor so that the
output voltage VOUT becomes the voltage
specified in the S-812C if the sufficient base-
emitter voltage VBE to turn on the PNP
transistor is obtained between input voltage
VIN and S-812C power source pin VIN.
VIN
R1
ON/OFF
VSS
CIN
CL
GND
Figure 11 Output Current Boost Circuit
•
•
As the transient response characteristics
of the circuit shown in figure 11 is not enough in some applications, evaluation for output variation due to
power-on, power line variation and load variation in actual condition is needed before massproduction.
Note that the short-circuit protection incorporated in the S-812C series does not work as a short-circuit
protection for the boost circuit.
2. Constant Current Circuit
(1) Constant Current Circuit
The S-812C series can be served in a
constant current circuit as shown in the
figure 12. Constant current IO is calculated
from the following equation:
VIN
VIN
S-812C
Series
VOUT
RL
ON/OFF
V0
IO
VSS
IO = (VOUT(E) ÷ RL) +ISS, where VOUT(E) is
the effective output voltage.
Please note that in case of the circuit
shown in the figure 12 (1) the magnitude of
the constant current IO is limited by the
driving ability of the S-812C.
CIN
Device
VO
GND
(2) Constant Current Boost Circuit
Tr1
The circuit shown in the figure 12 (2) can,
however, provide the current beyond the
driving ability of the S-812C by combining a
constant current circuit with a current boost
circuit. The maximum input voltage for the
constant current circuit is the sum of the
voltage VO of the device and 16 V. It is not
VIN
VOUT
S-812C
VIN
Series
VSS
R1
RL
ON/OFF
V0
recommended to attach
a
capacitor
I
o
Device
CIN
between the S-812C power source VIN
and VSS pins or between output VOUT
and VSS pins because rush current flows
at power-on.
VO
GND
Figure 12 Constant Current Circuits
3. Output Voltage Adjustment Circuit
The output voltage can be increased using the configuration shown in the figure 13. The output Voltage VOUT1
can be calculated using the following equation;
V
OUT1 = VOUT(E) x (R1 + R2) ÷ R1 + R2 x ISS
where VOUT(E) is the effective output voltage.
Value of R1 and R2 should be determined so as not to be affected by the current consumption ISS
,
.
Seiko Instruments Inc.
9
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
Capacitor C1 has an effect in minimizing output
VIN VIN
S-812C
Series
VOUT1
VOUT
fluctuation due to power-on, power line
variation and load variation. Determine the
optimum value in the actual device.
R1
R2
VSS
ON/OFF
CL
CIN
C1
GND
It is not also recommended to attach a
capacitor between the S-812 power source VIN
and VSS pins or between output VOUT and
VSS pins because output fluctuation or
oscillation at powering on might occur.
Figure 13 Voltage Adjustment Circuit
Notice
• Wiring patterns for VIN, VOUT and GND pins should be designed to hold low impedance.
When mounting an output capacitor, 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 1 µA).
• At low load current less than 100µA output voltage may increase when the regulating operation is halted by
the ON/OFF pin.
• To prevent oscillation, it is recommended to use the external components under the following conditions:
Equivalent Series Resistance (ESR): 10 Ω or less when an output capacitor is used.
Input series resistance (RIN): 10 Ω or less
• 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 and load current should not exceed the package power
dissipation.
• SII claims no responsibility for any and all disputes arising out of or in connection with any infringement of
the products including this IC upon patents owned by a third party.
10
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Typical Characteristics
(1) Output Voltage vs Output Current (When load current increases)
S-812C20B (Ta=25°C) Short- circuit protection
2.5
S-812C30B (Ta=25°C) Short-circuit protection
3.5
V =2.5V
IN
3.0
2.0
8V
5V
7V
2.5
1.5
2.0
6V
V =3.5V
1.5
1.0
0.5
0.0
IN
1.0
5V
4V
3V
0.5
0.0
4V
0
50
IOUT (mA)
100
150
0
50
100
IOUT (mA)
150
200
S-812C50B (Ta=25°C) Short-circuit protection
6.0
10V
5.0
Notice
The condition for input voltage and load current
should not exceed the package power dissipation.
4.0
8V
V =5.5V
IN
3.0
7V
2.0
1.0
0.0
6V
0
100
200
300
IOUT (mA)
S-812C20A (Ta=25ºC)
S-812C30A (Ta=25ºC)
No short-circuit protection
No short-circuit protection
3.5
2.5
VIN=3.3V
VIN=2.3V
2.0
3.0
2.5
1.5
2.0
7V
8V
2.5V
1.0
1.5
3.5V
6V
5V
4V
5V
1.0
0.5
0.0
4V
3V
0.5
0.0
0
100
200
300
0
100
200
IOUT (mA)
300
400
IOUT (mA)
S-812C50A (Ta=25ºC)
6.0
No short-circuit protection
Notice
The condition for input voltage and load current
should not exceed the package power dissipation.
5.0
4.0
3.0
10V
8V
2.0
VIN=5.3V
7V
6V
1.0
5.5V
100
0.0
0
200
IOUT (mA)
300
400
Seiko Instruments Inc.
11
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
(2) Maximum Output Current vs Input Voltage
S-812C20B
140
Short-circuit protection
S-812C30B
200
Short-circuit protection
120
100
80
Ta=-40°C
150
100
50
60
25°C
85°C
25°C
85°C
40
Ta=-40°C
20
0
0
0
4
8
12
16
0
4
8
12
16
VIN (V)
VIN (V)
S-812C50B
300
Short-circuit protection
Notice
Ta=-40°C
250
200
150
100
50
The condition for input voltage and load current
should not exceed the package power dissipation.
25°C
85°C
12
0
0
4
8
16
VIN (V)
S-812C20A
140
No short-circuit protection
S-812C30A
200
No short-circuit protection
120
Ta=−40ºC
º
Ta=-40 C
150
100
50
100
80
60
40
20
0
º
25 C
25ºC
85ºC
º
85 C
0
0
4
8
12
16
0
4
8
12
16
VIN (V)
VIN (V)
No short-circuit protection
S-812C50A
300
Notice
The condition for input voltage and load current
should not exceed the package power dissipation.
250
200
150
100
50
º
Ta=-40 C
º
25 C
85ºC
0
0
4
8
12
16
VIN(V)
12
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
(3) Output Voltage vs Input Voltage
S-812C20B
2.10
S-812C30B
3.15
-20mA
-20m A
IOUT =-1 A
µ
3.10
3.05
3.00
2.95
2.90
2.85
IOUT =-1 A
µ
2.05
2.00
1.95
1.90
-50mA
-10m A
-50m A
-10mA
m
-1
A
m
-1
A
1.5
2
2.5
3
3.5
4
2.5
3
3.5
VIN (V)
4
4.5
5
VIN (V)
S-812C50B
5.25
IOUT =-1 A
µ
-20m A
5.15
5.05
-10m A
-1m A
4.95
4.85
4.75
-50m A
4.5
5
5.5
6
6.5
7
VIN (V)
(4) Dropout Voltage vs Output Current
S-812C20B
2000
S-812C30B
1600
85°C
85°C
1400
1200
1000
800
600
400
200
0
25°C
1500
25°C
1000
500
0
Ta=-40°C
40
Ta=-40°C
0
10
20
30
50
0
10
20
30
40
50
IOUT (mA)
IOUT (mA)
S-812C50B
1000
900
800
700
600
500
400
300
200
100
0
85°C
25°C
Ta=-40°C
40
0
10
20
30
50
IOUT (mA)
Seiko Instruments Inc.
13
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
(5) Output Voltage vs Ambient Temperature
S-812C20B
2.04
S-812C30B
3.06
3.03
3.00
2.97
2.02
2.00
1.98
2.94
-50
1.96
-50
0
50
100
0
50
100
Ta (°C)
Ta (°C)
S-812C50B
5.10
5.05
5.00
4.95
4.90
-50
0
50
100
Ta (°C)
(6) Line Regulation 1 vs Ambient Temperature
20
(7) Line Regulation 2 vs Ambient Temperature
20
15
15
10
10
S-812C20B
S-812C20B
S-812C30B
S-812C50B
S-812C30B
S-812C50B
5
0
5
0
-50
0
50
100
-50
0
50
100
Ta (°C)
Ta (°C)
(8) Load Regulation vs Ambient Temperature
80
60
S-812C20B
40
20
0
S-812C30B
S-812C50B
-50
0
50
100
Ta (°C)
14
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
(9) Current Consumption vs Input Voltage
S-812C20B
2.5
S-812C30B
2.5
2.0
2.0
1.5
1.0
0.5
85°C
25°C
85°C
25°C
1.5
1.0
0.5
Ta=-40°C
Ta=-40°C
0.0
0
0.0
4
8
12
16
0
4
8
12
16
VIN (V)
VIN (V)
S-812C50B
2.5
2.0
1.5
1.0
0.5
85°C
25°C
Ta=-40°C
0.0
0
4
8
12
16
VIN (V)
(10)Power-off Pin Input Threshold vs Input Voltage
S-812C20B
2.5
Ta=-40°C
25°C
85°C
2.0
1.5
Ta=-40°C
1.0
0.5
25°C
12
85°C
0.0
0
4
8
16
VIN (V)
Seiko Instruments Inc.
15
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
REFERENCE DATA
Transient Response Characteristics (Typical data: Ta=25°C)
INPUT VOLTAGE
or
LOAD CURRENT
Overshoot
OUTPUT VOLTAGE
Undershoot
(1) Power-on : S-812C30B (CL=10µF; ceramic capacitor)
ON/OFF=0→5V, IOUT=10mA, C =10µF
L
IN
5V
0V
3V
0V
µ
TIME (100 s/div)
Load dependence of overshoot at power-on
CL dependence of overshoot at power-on
VIN, ON/OFF=0
V
(S)+2V, C =10 F
VIN,ON/OFF=0
VOUT(S)+2V, IOUT=10mA
→
→
µ
OUT
L
0.030
0.025
0.020
0.015
0.010
0.005
0.000
0.8
0.6
0.4
0.2
0.0
S-812C30B
S-812C50B
S-812C30B
S-812C50B
0
0.02
0.04 0.06
0.08
0.1
0
10
20
30
40
50
IOUT (A)
CL (µF)
VDD dependence of overshoot at power-on
Temperature dependence of overshoot at power-on
VIN ,ON/OFF=0
VDD, IOUT=10mA, C =10 F
→ µ
L
VIN, ON/OFF=0
0.06
V
OUT(S)+2V, IOUT=10mA, C =10 F
→
µ
L
0.035
0.030
0.025
0.020
0.015
0.010
0.005
0.000
S-812C30B
S-812C50B
0.05
0.04
S-812C50B
S-812C30B
0.03
0.02
0.01
0.00
0
5
10
VDD (V)
15
20
-50
0
50
100
Ta (°C)
16
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
(2) Power-on by ON/OFF pin : S-812C30A (CL=10µF; ceramic capacitor)
VIN=5V, ON/OFF=0 → 5V, IOUT=10mA, CL=10µF
5V
0V
3V
0V
TIME (200 µs/div)
Load dependence of overshoot at power-on
CL dependence of overshoot at power-on
VIN=VOUT(S)+2V, ON/OFF=0
V
(S)+2V, C =10 F
VIN=VOUT(S)+2V,ON/OFF=0
0.8
VOUT(S)+2V, IOUT=10mA
→
→
µ
OUT
L
0.8
0.6
0.4
0.2
0.0
0.6
0.4
0.2
0.0
S-812C50B
S-812C50B
S-812C30B
30
S-812C30B
0
10
20
40
50
0.001
0.01
0.1
1
10
100
µ
CL ( F)
IOUT (A)
VDD dependence of overshoot at power-on
Temperature dependence of overshoot at power-on
VIN=VOUT(S)+2V,ON/OFF=0
VOUT(S)+2V,IOUT=10mA,
→
VIN=VDD, ON/OFF=0
V
DD, IOUT=10mA,C =10 F
→
µ
L
C =10 F
µ
L
0.7
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.6
0.5
0.4
0.3
0.2
0.1
0.0
S-812C50B
S-812C50B
S-812C30B
S-812C30B
0
0.1
0.0
0
5
10
VDD (V)
15
20
-50
50
100
Ta (°C)
Seiko Instruments Inc.
17
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
(3) Line Transient Response : S-812C30B (CL=10µF; ceramic capacitor)
V ,ON/OFF=4→8V, IOUT=10mA
IN
10V
5V
0V
3V
2.9V
TIME (100 µs/div)
Load dependence of overshoot at line transient
CL dependence of overshoot at line transient
VIN, ON/OFF=VOUT(S)+1V
VOUT(S)+5V,
→
VIN, ON/OFF=VOUT(S)+1V
0.25
VOUT(S)+5V,IOUT=10mA
→
C =10 F
µ
L
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
S-812C30B
0.20
0.15
0.10
0.05
0.00
S-812C50B
S-812C50B
S-812C30B
0
10
20
30
40
50
0
10
20
30
40
50
µ
IOUT (A)
CL ( F)
VDD dependence of overshoot at line transient
Temperature dependence of overshoot at line transient
VIN, ON/OFF=VOUT(S)+1V
VOUT(S)+5V,
→
VIN, ON/OFF=VOUT(S)+1V
0.16
V
IOUT=10mA C =10 F
→
µ
DD
L
IOUT=10mA C =10 F
µ
L
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0.14
0.12
0.10
0.08
0.06
0.04
S-812C50B
S-812C50B
S-812C30B
0.02
0.00
S-812C30B
50
0
5
10
15
20
-50
0
100
VDD (V)
Ta (°C)
18
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
V ,ON/OFF=8→4V, IOUT=10mA
IN
10V
5V
0V
3V
2.9V
2.8V
TIME (500 µs/div)
Load dependence of undershoot at line transient
CL dependence of undershoot at line transient
VIN, ON/OFF=VOUT(S)+5V
VOUT(S)+1V,IOUT=10mA
→
VIN, ON/OFF=VOUT(S)+5V
V
(S)+1V, C =10 F
µ
OUT L
→
0.35
0.8
0.30
0.25
0.20
0.15
0.10
0.05
0.00
S-812C50B
0.6
0.4
0.2
0.0
S-812C50B
S-812C30B
S-812C30B
20
0
10
30
40
50
0
10
20
30
IOUT (A)
40
50
µ
CL ( F)
VDD dependence of undershoot at line transient
Temperature dependence of undershoot at line transient
VIN,ON/OFF=VOUT(S)+5V
VOUT(S)+1V,
→
VIN, ON/OFF=VDD
VOUT(S)+1V IOUT=10mA C =10 F
→ µ
L
I
OUT=10mA C =10 F
µ
L
0.25
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.20
0.15
0.10
0.05
S-812C50B
S-812C50B
S-812C30B
15
S-812C30B
0.00
0
5
10
20
-50
0
50
100
VDD (V)
Ta (°C)
Seiko Instruments Inc.
19
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
Rev.1.0
(4) Load Transient Response : S-812C30B (CL=10µF; ceramic capacitor)
V =5V, IOUT=10mA→1µA,CL=10µF
IN
10mA
0mA
3.1V
3V
2.9V
µ
TIME (200 s/div)
Load dependence of overshoot at load transient
CL dependence of overshoot at load transient
VIN, ON/OFF=VOUT(S)+2V,IOUT=10mA 1 A
→
µ
VIN, ON/OFF=VOUT(S)+2V, IOUT=I
1.2
1 A,C =10 F
OUT→ µ
µ
L
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
S-812C50B
S-812C50B
1.0
0.8
0.6
0.4
0.2
0.0
S-812C30B
S-812C30B
0
10
20
30
40
50
0
20
40
60
80
100
µ
IOUT (A)
CL ( F)
VDD dependence of overshoot at load transient
Temperature dependence of overshoot at load transient
IOUT=10mA 1 A, C =10 F
→ µ
µ
L
VIN, ON/OFF=VOUT(S)+2V, IOUT=10mA 1 A, C =10 F
→ µ
µ
L
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
S-812C50B
S-812C50B
S-812C30B
S-812C30B
0
5
10
VDD (V)
15
20
-50
0
50
100
Ta (°C)
20
Seiko Instruments Inc.
Rev.1.0
HIGH OPERATING VOLTAGE CMOS VOLTAGE REGULATOR
S-812C Series
V =5V, IOUT=1µA→ 10mA, C =10µF
IN
L
10mA
0mA
3V
2.9V
TIME (500 µs/div)
Load dependence of undershoot at load transient
CL dependence of undershoot at load transient
VIN, ON/OFF=VOUT(S)+2V, IOUT=1 A
1.2
I
,C =10 F
µ
→
µ
OUT
L
VIN, ON/OFF=VOUT (S)+2V,IOUT =1 A 10mA
µ →
0.25
1.0
0.8
0.6
0.4
0.2
0.0
S-812C50B
0.20
0.15
0.10
0.05
0.00
S-812C50B
S-812C30B
60
S-812C30B
10 20
0
20
40
80
100
0
30
40
50
µ
CL ( F)
IOUT (A)
VDD dependence of undershoot at load transient
Temperature dependence of undershoot at load transient
IOUT=1 A 10mA, C =10 F
µ
→
µ
VIN, ON/OFF=VOUT(S)+2V,IOUT=1 A 10mA, C =10 F
L
µ
→
µ
L
0.20
0.15
0.10
0.05
0.00
0.25
0.20
0.15
0.10
0.05
0.00
S-812C50B
S-812C30B
S-812C50B
S-812C30B
0
5
10
15
20
-50
0
50
100
VDD (V)
Ta (°C)
Seiko Instruments Inc.
21
MP005-A
010801
n SOT-23-5
Unit : mm
l Dimensions
2.9±0.2
1.9±0.2
0.45
4
5
2.8 +0.2
1.6
-0.3
+0.1
-0.06
1
2
3
0.16
1.1±0.1
1.3max.
0~0.15
0.95±0.1
No. MP005-A-P-SD-1.1
0.4±0.1
l Tape Specifications
l Reel Specifications
4.0±0.1(10-pitch total: 40.0±0.2)
3000 pcs./reel
+0.1
-0
2.0±0.05
0.27±0.05
ø1.5
12.5max.
4.0±0.1
+0.1
-0
ø1.0
1.4±0.2
+0
-3
3°max.
ø180
+1
-0
ø60
3.25±0.15
T1
5
4
9.0±0.3
ø13±0.2
1 2 3
Winding core
2±0.2
Feed direction
(60°)
(60°)
No. MP005-A-R-SD-1 0
UP005-A 000601
n SOT-89-5
Unit:mm
lDimensions
4.5±0.1
1.6±0.2
1.5±0.1
0.65min.
4
5
2.5±0.1
4.5+0.2
-0.3
1
2
3
1.5±0.1
1.5±0.1
0.4±0.05
0.65min.
0.1
3.1
0.3
0.35
45°
0.4±0.1
0.45±0.1
0.4±0.1
0.2
No. UP005-A-P-SD-1.1
lTaping Specifications
+0.1
lReel Specifications
ø1.5
-0
4.0±0.1(10 pitches:40±0.2)
1 reel holds 1000 ICs.
16.5max.
1.5±0.1
2.0±0.05
5.65±0.05
12.0±0.2
4.35±0.1
3°max.
+1
ø60
-0
+0.1
-0
0.3±0.05
2.0±0.1
8.0±0.1
ø1.5
5°max.
+0
-3
ø180
4.75±0.1
T2
13.0±0.3
Winding core
ø13±0.2
ø21±0.5
2±0.2
Feed direction
(60°)
(60°)
No. UP005-A-R-SD-1.0
No. UP005-A-C-SD-1.0
UP003-A 010515
n SOT-89-3
Unit:mm
lDimensions
4.5±0.1
1.6±0.2
1.5±0.1
4.0+0.25
2.5±0.1
0.8min.
-0.35
2
1
3
1.5±0.1
1.5±0.1
0.4±0.05
0.4
2.5
45°
0.4±0.1
0.4±0.1
0.4
0.45±0.1
No. UP003-A-P-SD-1.0
lTaping Specifications
lReel Specifications
1 reel holds 1000 ICs.
+0.1
-0
ø1.5
1.5±0.1
4.0±0.1(10 pitches:40.0±0.2)
2.0±0.05
16.5max.
5.65±0.05
4.35±0.1
12.0±0.2
+0.1
-0
ø1.5
8.0±0.1
0.3±0.05
2.0±0.1
5° max.
+1
-0
ø60
+0
-3
ø180
4.75±0.1
T2
13.0±0.3
Winding core
Feed direction
(60°)
(60°)
No. UP003-A-R-SD-1.0
No. UP003-A-C-SD-1.0
YF003-A 010515
Unit:mm
(2) Leadforming for tape (reel/zigzag)
n TO-92
lDimensions
(1) Bulk
5.2max.
4.2max.
4.2max.
5.2max.
Marked side
Marked side
5.0±0.2
5.0±0.2
0.6max.
0.6max.
0.8max.
2.3max.
0.8max.
2.3max.
10.0min.
12.7min.
0.45±0.1
0.45±0.1
0.45±0.1
0.45±0.1
+0.4
-0.1
2.5
1.27
No. YS003-A-P-SD-1.0
No. YF003-A-P-SD-1.0
1.27
lTape
lZigzag
12.7±1.0
1.0max.
1.0max.
Marked side
[Type Z]
Side spacer
24.7max.
165
16.0±0.5
19.0±0.5
#
0.5max.
1 pin
1.45max.
0.7±0.2
2.5min.
6.0±0.5
9.0±0.5
320
Spacer
+1.0
-0.5
18.0
ø4.0±0.2
6.35±0.4
60
12.7±0.3 (20-pitch total:254.0±1.0)
320
40
Feed direction
[Type F]
[Type T]
Marked side
Feed direction
Feed direction
Side Spacer placed in front side
Space more than 4 strokes
No. YF003-A-C-SD-1.0
lReel
1 reel holds 2000 ICs.
262
45±0.5
330
ø30±0.5
ø79±1
47
2±0.5
1 box holds 2500 ICs.
5±0.5
43±0.5
Feed direction
ø358±2
53±0.5
No. YF003-A-Z-SD-1.0
No. YF003-A-R-SD-1.0
·
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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.
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When the products described herein are regulated products subject to the Wassenaar Arrangement or other
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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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