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PDF ( 数据手册 , 数据表 ) S-1212B

零件编号 S-1212B
描述 LOW DROPOUT CMOS VOLTAGE REGULATOR
制造商 Seiko Instruments
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S-1212B 数据手册, 描述, 功能
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-1212B pdf, 数据表
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1212B/D Series
Rev.3.0_00
Absolute Maximum Ratings
Table 11
(Ta = +25°C unless otherwise specified)
Item
Symbol
Absolute Maximum Rating
Unit
Input voltage
VIN
VON / OFF
VSS 0.3 to VSS + 45
VSS 0.3 to VIN + 0.3 VSS + 45
V
V
Output voltage
VOUT
VSS 0.3 to VIN + 0.3 VSS + 45
V
Output current
IOUT
280 mA
Junction temperature
Tj
40 to +150
°C
Operation ambient temperature
Topr
40 to +105
°C
Storage temperature
Tstg
40 to +150
°C
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.
Thermal Resistance Value
Table 12
Item
Symbol
Condition
Board A
Board B
TO-252-5S(A) Board C
Board D
Board E
Board A
Board B
HSOP-8A
Board C
Board D
Board E
Board A
Board B
HSOP-6
Board C
Board D
Junction-to-ambient thermal resistance*1 θja
Board E
Board A
Board B
SOT-89-5
Board C
Board D
Board E
Board A
HTMSOP-8
Board B
Board C
Board D
Board E
Board A
Board B
SOT-23-5
Board C
Board D
Board E
*1. Test environment: compliance with JEDEC STANDARD JESD51-2A
Remark Refer to "Power Dissipation" and "Test Board" for details.
8
Min. Typ. Max. Unit
90 − °C/W
58 − °C/W
38 − °C/W
30 − °C/W
29 − °C/W
115 − °C/W
82 − °C/W
42 − °C/W
43 − °C/W
35 − °C/W
106 − °C/W
82 − °C/W
− − − °C/W
51 − °C/W
48 − °C/W
123 − °C/W
90 − °C/W
− − − °C/W
53 − °C/W
41 − °C/W
161 − °C/W
116 − °C/W
44 − °C/W
44 − °C/W
35 − °C/W
180 − °C/W
143 − °C/W
− − − °C/W
− − − °C/W
− − − °C/W







S-1212B equivalent, schematic
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1212B/D Series
Rev.3.0_00
5. Thermal shutdown circuit
The S-1212B/D Series has a built-in thermal shutdown circuit to limit overheating. When the junction temperature
increases to 165°C typ., the thermal shutdown circuit becomes the detection status, and the regulating is stopped.
When the junction temperature decreases to 140°C typ., the thermal shutdown circuit becomes the release status,
and the regulator is restarted.
If the thermal shutdown circuit becomes the detection status due to self-heating, the regulating is stopped and VOUT
decreases. For this reason, the self-heating is limited and the temperature of the IC decreases. The thermal
shutdown circuit becomes release status when the temperature of the IC decreases, and the regulating is restarted,
thus the self-heating is generated again. Repeating this procedure makes the waveform of VOUT into a pulse-like
form. This phenomenon continues unless decreasing either or both of the input voltage and the output current in
order to reduce the internal power consumption, or decreasing the ambient temperature. Note that the product may
suffer physical damage such as deterioration if the above phenomenon occurs continuously.
Caution 1. When the heat radiation of the application is not in a good condition, the self-heating cannot be
limited immediately, and the IC may suffer physical damage. Perform thorough evaluation
including the temperature characteristics with an actual application to confirm no problems
happen.
2. If a large load current flows during the restart process of regulating after the thermal shutdown
circuit changes to the release status from the detection status, the thermal shutdown circuit
becomes the detection status again due to self-heating, and a problem may happen in the restart
of regulating. A large load current, for example, occurs when charging to the CL whose
capacitance is large.
Perform thorough evaluation including the temperature characteristics with an actual application
to select CL.
Table 15
Thermal Shutdown Circuit
Release: 140°C typ.*1
Detection: 165°C typ.*1
VOUT Pin Voltage
Constant value*2
Pulled down to VSS*3
*1. Junction temperature
*2. The constant value is output due to the regulating based on the set output voltage value.
*3. The VOUT pin voltage is pulled down to VSS due to the feedback resistors (Rs and Rf) and a load.
16










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