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S-1212D Schematic ( PDF Datasheet ) - Seiko Instruments

Teilenummer S-1212D
Beschreibung LOW DROPOUT CMOS VOLTAGE REGULATOR
Hersteller Seiko Instruments
Logo Seiko Instruments Logo 




Gesamt 30 Seiten
S-1212D Datasheet, Funktion
S-1212B/D Series
www.sii-ic.com
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
© SII Semiconductor Corporation, 2015-2016
Rev.3.0_00
The S-1212B/D Series, developed by using high-withstand voltage CMOS process technology, is a positive voltage regulator
with a high-withstand voltage, low current consumption and high-accuracy output voltage, and has a built-in ON / OFF
circuit.
The S-1212B/D Series operates at the maximum operation voltage of 36 V and a low current consumption of 6.5 μA typ.,
and has a built-in low on-resistance output transistor which provides a very small dropout voltage and a large output current.
Also, a built-in overcurrent protection circuit to limit overcurrent of the output transistor and a built-in thermal shutdown circuit
to limit heat are included.
Features
Output voltage:
Input voltage:
Output voltage accuracy:
Current consumption:
Output current:
Input capacitor:
Output capacitor:
Built-in overcurrent protection circuit:
Built-in thermal shutdown circuit:
Built-in ON / OFF circuit:
Built-in discharge shunt circuit:
Operation temperature range:
Lead-free (Sn 100%), halogen-free
2.5 V to 16.0 V, selectable in 0.1 V step
3.0 V to 36 V
±2.0% (Ta = +25°C)
During operation: 6.5 μA typ. (Ta = +25°C)
During power-off: 0.1 μA typ. (Ta = +25°C)
Possible to output 250 mA (at VIN VOUT(S) + 2.0 V)*1
A ceramic capacitor can be used. (1.0 μF or more)
A ceramic capacitor can be used. (1.0 μF to 100 μF)
Limits overcurrent of output transistor.
Detection temperature 165°C typ.
Ensures long battery life.
Discharges the electric charge of the output capacitor during power-off.
(RLOW = 70 kΩ typ.)
Ta = 40°C to +105°C
*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.
Applications
Constant-voltage power supply for industrial equipment
Constant-voltage power supply for home electric appliance
Packages
TO-252-5S(A)
HSOP-8A
HSOP-6
SOT-89-5
HTMSOP-8
SOT-23-5
1






S-1212D Datasheet, Funktion
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1212B/D Series
Rev.3.0_00
3. HSOP-6
Top view
654
123
Figure 4
Pin No.
1
2
3
4
5
6
Table 7
Symbol
VOUT
VSS
Description
Output voltage pin
GND pin
ON / OFF
NC*1
VSS
ON / OFF pin
No connection
GND pin
VIN Input voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
4. SOT-89-5
Top view
54
123
Figure 5
Pin No.
1
2
3
4
5
Table 8
Symbol
NC*1
VSS
VIN
VOUT
ON / OFF
Description
No connection
GND pin
Input voltage pin
Output voltage pin
ON / OFF pin
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
5. HTMSOP-8
Top view
18
27
36
45
Bottom view
81
72
63
54
*1
Pin No.
1
2
3
4
5
6
7
8
Table 9
Symbol
VOUT
NC*2
NC*2
ON / OFF
VSS
NC*2
NC*2
VIN
Description
Output voltage pin
No connection
No connection
ON / OFF pin
GND pin
No connection
No connection
Input voltage pin
Figure 6
*1. Connect the heat sink of backside at shadowed area to the board, and set electric potential GND.
However, do not use it as the function of electrode.
*2. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
6

6 Page









S-1212D pdf, datenblatt
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1212B/D Series
Rev.3.0_00
Standard Circuit
Input
CIN*1
VIN VOUT
ON / OFF
VSS
Output
CL*2
Single GND
GND
*1. CIN is a capacitor for stabilizing the input.
*2. CL is a capacitor for stabilizing the output.
Figure 14
Caution The above connection diagram and constants will not guarantee successful operation. Perform
thorough evaluation using an actual application to set the constants.
Condition of Application
Input capacitor (CIN): A ceramic capacitor with capacitance of 1.0 μF or more is recommended.
Output capacitor (CL): A ceramic capacitor with capacitance of 1.0 μF to 100 μF is recommended.
Caution Generally, in a voltage regulator, an oscillation may occur depending on the selection of the external
parts. Perform thorough evaluation including the temperature characteristics with an actual
application using the above capacitors to confirm no oscillation occurs.
Selection of Input Capacitor (CIN) and Output Capacitor (CL)
The S-1212B/D Series requires CL between the VOUT pin and the VSS pin for phase compensation. The operation is
stabilized by a ceramic capacitor with capacitance of 1.0 μF to 100 μF. When using an OS capacitor, a tantalum
capacitor or an aluminum electrolytic capacitor, the capacitance also must be 1.0 μF to 100 μF. However, an oscillation
may occur depending on the equivalent series resistance (ESR).
Moreover, the S-1212B/D Series requires CIN between the VIN pin and the VSS pin for a stable operation.
Generally, an oscillaiton may occur when a voltage regulator is used under the conditon that the impedance of the power
supply is high.
Note that the output voltage transient characteristics varies depending on the capacitance of CIN and CL and the value of
ESR.
Caution Perform thorough evaluation including the temperature characteristics with an actual application to
select CIN and CL.
12

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