S1212

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www.sii-ic.com HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR © Seiko Instruments Inc., 2015 Rev.1.1_00 Seiko Instruments Inc. 1 The S-1212 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-1212 Series operates at the ma ximum operation voltage of 36 V and a low current consumption of 6.5 μA typ., and has a built-in low on-resistance transistor which provides a very small dropout voltage and a large output current. Also, a built-in overcurrent protection circuit to limit overcu rrent of the output transistor and a built-in thermal shutdown circuit to limit heat are included.  Features

• Output voltage: 2.5 V to 16.0 V, selectable in 0.1 V step
• Input voltage: 3.0 V to 36 V
• Output voltage accuracy: ±2.0% (Ta = +25°C)
• Current consumption: During operation: 6.5 μA typ. (Ta = +25°C) During power-off: 0.1 μA typ. (Ta = +25°C)
• Output current: Possible to output 250 mA (at V IN ≥ VOUT(S) + 2.0 V)*1
• Input capacitor: A ceramic capacitor can be used. (1.0 μF or more)
• Output capacitor: A ceramic capacitor can be used. (1.0 μF to 100 μF)
• Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
• Built-in thermal shutdown circuit: Detection temperature 165 °C typ.
• Built-in ON / OFF circuit: Ensures long battery life.
• Built-in discharge shunt circ uit: Discharges the electric charge of the output capacitor during power-off. (R LOW = 70 kΩ typ.)
• Operation temperature range: Ta = −40°C to +105°C
• Lead-free (Sn 100%), halogen-free *1. Please make sure that the loss of the IC will not exceed the power dissipation when t he output current is large.  Applications
• Constant-voltage power supply for industrial equipment
• Constant-voltage power supply for home electric appliance  Packages
• HSOP-8A
• HSOP-6
• SOT-89-5
• SOT-23-5

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 2  Block Diagram Reference voltage circuit ON / OFF ON / OFF circuit VIN VSS VOUT Overcurrent protection circuit Thermal shutdown circuit *1. Parasitic diode *2. The ON / OFF circuit controls the in ternal circuit and the output transistor. Figure 1

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 3  Product Name Structure Users can select the output vo ltage and package type for the S-1212 Series. Refer to " 1. Product name " regarding the contents of product name, " 2. Packages " regarding the package drawings and " 3. Product name list " for details of product names. 1. Product name S-1212 B xx - xxxx U Package abbreviation and IC packing specifications*1 E8T1: HSOP-8A, Tape E6T1: HSOP-6, Tape U5T1: SOT-89-5, Tape M5T1: SOT-23-5, Ta pe Set output voltage 25 to G0 (e.g., when the set output voltage is 2.5 V, it is expressed as 25. when the set output voltage is 10. 0 V, it is expressed as A0. when the set output voltage is 11. 0 V, it is expressed as B0. when the set output voltage is 16. 0 V, it is expressed as G0.) Product type B: ON / OFF pin positive logic Environmental code U: Lead-free (Sn 100%), halogen-free *1. Refer to the tape drawing. *2. Refer to " 3. ON / OFF pin " in " Operation". 2. Packages Table 1 Package Drawing Codes Package Name Dimension Tape Reel Land HSOP-8A FH008-A-P-SD FH008-A-C-SD FH008-A-R-SD FH008-A-L-SD HSOP-6 FH006-A-P-SD FH006-A-C-SD FH006-A-R-S1 − SOT-89-5 UP005-A-P-SD UP00 5-A-C-SD UP005-A-R-SD − SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD −

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 4 3. Product name list Table 2 Output Voltage HSOP-8A HSOP-6 SOT-89-5 SOT-23-5 3.3 V ± 2.0% S-1212B33-E8T1U S-1212B33-E6 T1U S-1212B33-U5T1U S-1212B33-M5T1U 5.0 V ± 2.0% S-1212B50-E8T1U S-1212B50-E6 T1U S-1212B50-U5T1U S-1212B50-M5T1U 8.0 V ± 2.0% S-1212B80-E8T1U S-1212B80-E6 T1U S-1212B80-U5T1U S-1212B80-M5T1U 12.0 V ± 2.0% S-1212BC0-E8T1U S-1212BC0-E6T1U S-1212BC0-U5T1U S-1212BC0-M5T1U Remark Please contact our sales office for products with specifications other than the above output voltage.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 5  Pin Configurations 1. HSOP-8A Bottom view Top view *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. Table 3 Pin No. Symbol Description

1 VOUT Output voltage pin

2 NC*1 No connection

3 NC*1 No connection

4 ON / OFF ON / OFF pin

5 VSS GND pin

6 NC*1 No connection

7 NC*1 No connection

8 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. Figure 2 2. HSOP-6 13 2 465 Top view Figure 3 Table 4 Pin No. Symbol Description

2 VSS GND pin

3 ON / OFF ON / OFF pin

4 NC*1 No connection

6 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.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 6 3. SOT-89-5 13 2 Top view Figure 4 Table 5 Pin No. Symbol Description

1 NC*1 No connection

3 VIN Input voltage pin

4 VOUT Output voltage pin

5 ON / OFF ON / OFF pin

*1. The NC pin is electrically open. The NC pin can be connected to the VIN pin or the VSS pin. 4. SOT-23-5 13 2 Top view Figure 5 Table 6 Pin No. Symbol Description

1 VIN Input voltage pin

5 VOUT

*1. The NC pin is electrically open. The NC pin can be connected to the VIN pin or the VSS pin.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 7  Absolute Maximum Ratings Table 7 (Ta = +25°C unless otherwise specified) Item Symbol Abso lute Maximum Rating Unit Input voltage VIN V SS − 0.3 to VSS + 45 V VON / OFF V SS − 0.3 to VIN + 0.3 ≤ VSS + 45 V Output voltage V OUT V SS − 0.3 to VIN + 0.3 ≤ VSS + 45 V Output current I OUT 280 mA Junction temperature T j −40 to +150 °C Operation ambient temperature T opr −40 to +105 °C Storage temperature T stg −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 8 Item Symbol Condition Min. Typ. Max. Unit Junction-to-ambient thermal resistance *1 θja HSOP-8A Board 1 − 115 − ° C/W Board 2 − 82 − ° C/W Board 3 − 42 − ° C/W Board 4 − 43 − ° C/W Board 5 − 35 − ° C/W HSOP-6 Board 1 − 106 − ° C/W Board 2 − 82 − ° C/W Board 3 − 51 − ° C/W Board 4 − 48 − ° C/W SOT-89-5 Board 1 − 123 − ° C/W Board 2 − 90 − ° C/W Board 3 − 53 − ° C/W Board 4 − 41 − ° C/W SOT-23-5 Board 1 − 180 − ° C/W Board 2 − 143 − ° C/W *1. Test environment: compliance with JEDEC STANDARD JESD51-2A Remark Refer to " Thermal Characteristics" for details of power dissipation and test board.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 8  Electrical Characteristics Table 9 (Ta = +25°C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Output voltage*1 VOUT(E) VIN = VOUT(S) + 2.0 V, IOUT = 10 mA VOUT(S) × 0.980 VOUT(S) VOUT(S) × 1.020 V 1 Output current*2 IOUT VIN ≥ VOUT(S) + 2.0 V 250*4 − − mA 3 Dropout voltage*3 Vdrop IOUT = 125 mA − 0.35 − V 1 IOUT = 250 mA − 0.80 − V 1 Line regulation OUTIN 1OUT VV V Δ VOUT(S) + 0.5 V ≤ VIN ≤ 36 V, IOUT = 10 mA, Load regulation ΔVOUT2 VIN = VOUT(S) + 2.0 V, 2.5 V ≤ VOUT(S) < 5.1 V, 0.1 mA ≤ IOUT ≤ 40 mA, Tj = +25°C − 16 30 mV 1 VIN = VOUT(S) + 2.0 V, 5.1 V ≤ VOUT(S) < 12.1 V, 0.1 mA ≤ IOUT ≤ 40 mA, Tj = +25°C − 16 35 mV 1 VIN = VOUT(S) + 2.0 V, 12.1 V ≤ VOUT(S) ≤ 16.0 V, 0.1 mA ≤ IOUT ≤ 40 mA, Tj = +25°C − 16 40 mV 1 Current consumption during operation ISS1 VIN = 18.0 V, VON / OFF = VIN, IOUT = 0.01 mA − 6.5 8.5 μA2 Current consumption during power-off ISS2 VIN = 18.0 V, VON / OFF = 0 V, no load − 0.1 3.5 μA2 Input voltage V IN − 3.0 − 36 V − ON / OFF pin input voltage "H" VSH VIN = 18.0 V, RL = 1.0 kΩ, determined by VOUT output level 1.5 − − V 4 ON / OFF pin input voltage "L" VSL VIN = 18.0 V, RL = 1.0 kΩ, determined by VOUT output level − − 0.25 V 4 ON / OFF pin input current "H" ISH VIN = 18.0 V, VON / OFF = VIN −0.1 − 0.1 μA4 ON / OFF pin input current "L" ISL VIN = 18.0 V, VON / OFF = 0 V −0.1 − 0.1 μA4 Ripple rejection |RR| VIN = VOUT(S) + 2.0 V, f = 100 Hz, ΔVrip = 0.5 Vrms, IOUT = 10 mA 2.5 V ≤ VOUT(S) < 3.6 V − 45 − dB 5 3.6 V ≤ VOUT(S) < 6.1 V − 40 − dB 5 6.1 V ≤ VOUT(S) < 10.1 V − 35 − dB 5 10.1 V ≤ VOUT(S) ≤ 16.0 V − 30 − dB 5 Short-circuit current I short VIN = VOUT(S) + 2.0 V, VON / OFF = VIN, VOUT = 0 V − 120 − mA 3 Thermal shutdown detection temperature TSD Junction temperature − 165 − °C − Thermal shutdown release temperature TSR Junction temperature − 140 − °C − Discharge shunt resistance during power-off RLOW VIN = 18.0 V, VON / OFF = 0 V, VOUT = 2.0 V − 70 − kΩ 6 *1. V OUT(S): Set output voltage VOUT(E): Actual output voltage The output voltage when V IN = VOUT(S) + 2.0 V, IOUT = 10 mA *2. The output current at which the output voltage becomes 95% of V OUT(E) after gradually increa sing the output current. *3. V drop = VIN1 − (VOUT3 × 0.98) VIN1 is the input voltage at which th e output voltage becomes 98% of V OUT3 after gradually decreasing the input voltage. VOUT3 is the output voltage when V IN = VOUT(S) + 2.0 V, and IOUT = 125 mA or 250 mA. *4. Due to limitation of the power dissipation, this value may not be satisfied. Attention should be paid to the power dissipation when the output current is large. This specification is guaranteed by design.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 10 Set to GND VOUTVIN VSS VON / OFF A Figure 11 Test Circuit 6

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 11  Standard Circuit CIN *1 CL Input Output GNDSingle GND VOUTVIN VSS ON / OFF *1. CIN is a capacitor for stabilizing the input. *2. CL is a capacitor for stabilizing the output. Figure 12 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 wi th capacitance of 1.0 μF or more is recommended. Output capacitor (CL): A ceramic capacitor wi th capacitance of 1.0 μF to 100 μF is recommended. Caution Generally, in a voltage regu lator, an oscillation may occur depe nding on the selection of the external parts. Perform thorough evaluation including the temperature characteristics with an actual application using the above capacitor s to confirm no oscillation occurs.  Selection of Input Capacitor (CIN) and Output Capacitor (CL) The S-1212 Series requires C L between the VOUT pin and the VSS pin for phase compensation. The operation is stabilized by a ceramic capa citor with capacitance of 1.0 μF to 100 μF. When using an OS capacitor, a tantalum capacitor or an aluminum electrolytic ca pacitor, 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-1212 Series requires C IN between the VIN pin and the VS S pin for a stable operation. Generally, an oscillaiton may occur when a voltage regulato r is used under the conditon that the impedance of the power supply is high. Note that the output voltage tr ansient characteristics varies depending on the capacitance of C IN and CL and the value of ESR. Caution Perform thorough evaluation including the temperature characteristics with an actual application to select C IN and CL.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 12  Explanation of Terms 1. Low dropout voltage regulator This is a voltage regulator which made dropout voltage small by its built-in low on-resistance output transistor. 2. Output voltage (V OUT) This voltage is output at an accuracy of ±2.0% when the input voltage, the ou tput current and the temperature are in a certain condition *1. *1. Differs depending on the product. Caution If the certain condition is not satisfied, the output voltage may exceed the accuracy range of ±2.0%. Refer to " Electrical Characteristics" and "  Characteristics (Typical Data)" for details. 3. Line regulation  ΔVOUT1 ΔVIN • VOUT Indicates the dependency of the output voltage against the input voltage. That is, the value shows how much the output voltage changes due to a change in the inpu t voltage after fixing ou tput current constant. 4. Load regulation ( ΔVOUT2) Indicates the dependency of the output voltage against the output current. That is, the value shows how much the output voltage changes due to a change in the ou tput current after fixing input voltage constant. 5. Dropout voltage (V drop) Indicates the difference between input voltage (V IN1) and the output voltage when th e output voltage becomes 98% of the output voltage value (V OUT3) at VIN = VOUT(S) + 2.0 V after the input voltage (V IN) is decreased gradually. Vdrop = VIN1 − (VOUT3 × 0.98)

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 14 3. ON / OFF pin The ON / OFF pin controls the internal circuit and the output transistor in order to start and stop the regulator. When the ON / OFF pin is set to OFF, the internal circuit st ops operating and the output tr ansistor between the VIN pin and the VOUT pin is turned off, reducing current consumption significantly. The internal equivalent circuit related to the ON / OFF pin is configured as shown in Figure 14. Since the ON / OFF pin is neither pulled down nor pulled up, do not use it in the floating status. When not using the ON / OFF pin, connect it to the VIN pin. Note that the current consumption increases when a voltage of 0.25 V to V IN − 0.3 V is applied to the ON / OFF pin. Table 10 Product Type ON / OFF Pin Internal Circuit VOUT Pin Voltage Current Consumption B "H": ON Operate Constant value*1 ISS1 B "L": OFF Stop Pulled down to VSS *2 ISS2 *1. The constant value is output due to the r egulating based on the set output voltage value. *2. The VOUT pin voltage is pulled down to V SS due to the discharge shunt circuit (R LOW = 70 k Ω typ.), the feedback resistors (R s and Rf) and a load. VSS ON / OFF VIN Figure 14 4. Overcurrent protection circuit The S-1212 Series has a built-in overcurrent protection circuit to limit the over current of the output transistor. When the VOUT pin is shorted with the VSS pin, that is, at the ti me of the output short-circuit, the output current is limited to 120 mA typ. due to the overcurrent protection circuit op eration. The S-1212 Series restarts regulating when the output transistor is released fr om the overcurrent status. Caution 1. This overcurrent protection circuit does not work as for thermal protection. For example, when the output transistor keeps the overcurrent status long at the time of output short-circuit or due to other reasons, pay attention to the conditions of the input voltage and the load current so as not to exceed the power dissipation. 2. Note that any interference may be caused in the output voltage start-up when a load heavier than V OUT(S) 100 mA is connected.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 15 5. Thermal shutdown circuit The S-1212 Series has a built-in thermal shutdown circui t 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-heati ng, the regulating is stopped and V OUT 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 temperatur e of the IC decreases, and t he regulating is restarted, thus the self-heating is gener ated again. Repeating this procedure makes the waveform of V OUT 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 C L whose capacitance is large. Perform thorough evaluation including the temperature characteristics with an actual application to select C L. Table 11 Thermal Shutdown Circuit VOUT Pin Voltage Release: 140°C typ.*1 Constant value *2 Detection: 165°C typ.*1 Pulled down to V SS *1. Junction temperature *2. The constant value is output due to the r egulating based on the set output voltage value. *3. The VOUT pin voltage is pulled down to V SS due to the feedback resistors (R s and Rf) and a load.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 16  Precautions

• Generally, when a voltage regulator is used under the condit ion that the load current value is small (0.1 mA or less), the output voltage may increase due to the leakage current of an output transistor.
• Generally, when a voltage regulator is used under the condit ion that the temperature is high, the output voltage may increase due to the leakage curre nt of an output transistor.
• Generally, when the ON / OFF pin is used under the condit ion of OFF, the output volt age may increase due to the leakage current of an output transistor.
• Generally, when a voltage regulator is used under the condi tion that the impedance of the power supply is high, an oscillation may occur. Perform thorough evaluation in cluding the temperature characteristics with an actual application to select C IN.
• Generally, in a voltage regulator, an oscillation may oc cur depending on the selection of the external parts. The following use conditions are recommended in the S-1212 Se ries, however, perform thorough evaluation including the temperature characteristics with an actual application to select C IN and CL. Input capacitor (C IN): A ceramic capacitor wi th capacitance of 1.0 μF or more is recommended. Output capacitor (CL): A ceramic capacitor wi th capacitance of 1.0 μF to 100 μF is recommended.
• Generally, in a voltage regulator, the values of an overshoot and an undershoot in the output voltage vary depending on the variation factors of input voltage start-up, in put voltage fluctuation and load fluctuation etc., or the capacitance of C IN or CL and the value of the equivalent series resi stance (ESR), which may cause a problem to the stable operation. Perform thorough evaluat ion including the temperature characteristics with an actual application to select CIN and CL.
• Generally, in a voltage regulator, an overshoot may occur in the output voltage moment arily if the input voltage steeply changes when the input voltage is started up or the input voltage fluc tuates etc. Perform thorough evaluation including the temperature characteristics with an ac tual application to confirm no problems happen.
• Generally, in a voltage regulator, if the VOUT pin is steeply shorted with GND, a negative voltage exceeding the absolute maximum ratings may occur in the VOUT pin due to resonance phenomenon of the inductance and the capacitance including C L on the application. The resonance phenomenon is expected to be weakened by inserting a series resistor into the resonance path, and the negativ e voltage is expected to be limit ed by inserting a protection diode between the VOUT pin and the VSS pin.
• If the input voltage is started up steeply under the condition that the capacitance of C L is large, the thermal shutdown circuit may be in the detection status by self-heating due to the charge current to C L.
• Make sure of the conditions for the input voltage, output voltage and the load current so that the internal loss does not exceed the power dissipation.
• Do not apply an electrostatic discharge to this IC that ex ceeds the performance ratings of the built-in electrostatic protection circuit.
• When considering the output current va lue that the IC is able to output, ma ke sure of the output current value specified in Table 9 in " Electrical Characteristics " and footnote *4 of the table.
• Wiring patterns on the application related to the VIN pin, the VOUT pin and the VSS pin should be designed so that the impedance is low. When mounting C IN between the VIN pin and the VSS pin and C L between the VOUT pin and the VSS pin, connect the capacitors as close as possi ble to the respective destination pins of the IC.
• In the package equipped with heat sink of backside, mount the heat sink firmly. Since the heat radiation differs according to the condition of the application, perform thor ough evaluation with an actual application to confirm no problems happen.
• 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.

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 17  Characteristics (Typical Data) 1. Output voltage vs. Output current (When load current increases) (Ta = +25°C) 1. 1 V OUT = 2.5 V 1. 2 V OUT = 5.0 V 100 200 300 400 500 600 700 8000 3.0 1.5 1.0 0.5 2.0 2.5 0.0 VOUT [V] IOUT [mA] VIN = 3.0 V VIN = 4.5 V VIN = 3.5 V VIN = 9.0 V 100 200 300 400 500 600 700 8000 6.0 3.0 2.0 1.0 4.0 5.0 0.0 VOUT [V] IOUT [mA] VIN = 5.5 V VIN = 7.0 V VIN = 6.0 V VIN = 9.0 V Remark In determining the output cu rrent, attention should be paid to the following. 1. The minimum output current value and footnote *4 of Table 9 in " Electrical Characteristics " 2. Power dissipation 2. Output voltage vs. Input voltage (Ta = +25°C) 2. 1 V OUT = 2.5 V 2. 2 V OUT = 5.0 V 6 1 21 82 43 03 60 2.9 1.7 VOUT [V] VIN [V] 2.3 1.9 2.5 2.1 2.7 IOUT = 0.1 mA IOUT = 10 mA IOUT = 40 mA 6 1 21 82 43 03 60 5.4 4.2 VOUT [V] VIN [V] 4.8 4.4 5.0 4.6 5.2 IOUT = 0.1 mA IOUT = 10 mA IOUT = 40 mA 2. 3 V OUT = 16.0 V 6 1 21 82 43 03 60 16.4 15.2 VOUT [V] VIN [V] 15.8 15.4 16.0 15.6 16.2 IOUT = 0.1 mA IOUT = 10 mA IOUT = 40 mA

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 18 3. Dropout voltage vs. Output current 3. 1 V OUT = 2.5 V 3. 2 V OUT = 5.0 V 50 100 150 200 2500 Vdrop [V] IOUT [mA] 1.2 0.0 0.6 0.2 0.8 0.4

1.0 Tj = +150C

Tj = +25C Tj = 40C 50 100 150 200 2500 Vdrop [V] IOUT [mA] 1.2 0.0 0.6 0.2 0.8 0.4 Tj = +25C Tj = 40C 3. 3 V OUT = 16.0 V 50 100 150 200 2500 Vdrop [V] IOUT [mA] 1.2 0.0 0.6 0.2 0.8 0.4 Tj = +25C Tj = 40C 4. Dropout voltage vs. Junction temperature 4. 1 V OUT = 2.5 V 4. 2 V OUT = 5.0 V −25 0 150 125100755025−40 0.0 0.6 Vdrop [V] 0.5 0.4 0.3 0.2 0.1 T j [C] IOUT = 10 mA IOUT = 125 mA −25 0 150 125100755025−40 0.0 0.6 Vdrop [V] 0.5 0.4 0.3 0.2 0.1 T j [C] IOUT = 10 mA IOUT = 125 mA 4. 3 V OUT = 16.0 V −25 0 150 125100755025−40 0.0 0.6 Vdrop [V] 0.5 0.4 0.3 0.2 0.1 T j [C] IOUT = 10 mA IOUT = 125 mA

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 19 5. Dropout voltage vs. Set output voltage (Ta = +25°C) 1.0 0.0 VOUT(S) [V] 0.8 0.6 0.4 0.2 Vdrop [V] IOUT = 0.1 mA IOUT = 10 mA IOUT = 40 mA IOUT = 125 mA IOUT = 250 mA 6. Output voltage vs. Junction temperature 6. 1 V OUT = 2.5 V VIN = 4.5 V 6. 2 V OUT = 5.0 V VIN = 7.0 V −25 0 150 125100755025−40 2.45 2.55 Tj [C] 2.53 2.51 2.49 2.47 VOUT [V] −25 0 150 125100755025−40 4.90 5.10 Tj [C] 5.06 5.02 4.98 4.94 VOUT [V] 6. 3 V OUT = 16.0 V VIN = 18.0 V −25 0 150 125100755025−40 4.90 5.10 Tj [C] 5.06 5.02 4.98 4.94 VOUT [V]

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 20 7. Current consumption during operation vs. Input voltage (When ON / OFF pin is ON, no load) 7. 1 V OUT = 2.5 V 7. 2 V OUT = 5.0 V 6 1 21 82 43 03 60 50.0 0.0 ISS1 [A] VIN [V] 40.0 30.0 20.0 10.0 Tj = 150C Tj = 25C Tj = 40C 6 1 21 82 43 03 60 50.0 0.0 ISS1 [A] VIN [V] 40.0 30.0 20.0 10.0 Tj = 150C Tj = 25C Tj = 40C 7. 3 V OUT = 16.0 V 6 1 21 82 43 03 60 50.0 0.0 ISS1 [A] VIN [V] 40.0 30.0 20.0 10.0 Tj = 150C Tj = 25C Tj = 40C 8. Current consumption during operation vs. Junction temperature 8. 1 V OUT = 2.5 V VIN = 18.0 V 8. 2 V OUT = 5.0 V VIN = 18.0 V 25 50 75 100 125 1500 10.0 0.0 Tj [C] 8.0 6.0 4.0 2.0 ISS1 [A] 25 50 75 100 125 1500 10.0 0.0 Tj [C] 8.0 6.0 4.0 2.0 ISS1 [A] 8. 3 V OUT = 16.0 V VIN = 18.0 V 25 50 75 100 125 1500 10.0 0.0 Tj [C] 8.0 6.0 4.0 2.0 ISS1 [A]

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 21 9. Current consumption during operation vs. Output current (Ta = +25°C) 9. 1 V OUT = 2.5 V 9. 2 V OUT = 5.0 V 50 100 150 200 2500 50.0 0.0 40.0 30.0 20.0 10.0 ISS1 [A] IOUT [mA] VIN = 13.5 V VIN = 3.5 V 50 100 150 200 2500 50.0 0.0 40.0 30.0 20.0 10.0 ISS1 [A] IOUT [mA] VIN = 13.5 V VIN = 6.0 V 9. 3 V OUT = 16.0 V 50 100 150 200 2500 50.0 0.0 40.0 30.0 20.0 10.0 ISS1 [A] IOUT [mA] VIN = 20.0 V VIN = 17.0 V 10. Ripple rejection (Ta = +25°C) 10. 1 V OUT = 2.5 V VIN = 4.5 V, CL = 1.0 μF 10. 2 V OUT = 5.0 V VIN = 7.0 V, CL = 1.0 μF Ripple Rejection [dB] Frequency [Hz] 10 100k 120 10k1k100 100 IOUT = 10 mA IOUT = 250 mA IOUT = 0.01 mA Ripple Rejection [dB] Frequency [Hz] 10 100k 120 10k1k100 100 IOUT = 10 mA IOUT = 250 mA IOUT = 0.01 mA 10. 3 V OUT = 16.0 V VIN = 18.0 V, CL = 1.0 μF Ripple Rejection [dB] Frequency [Hz] 10 100k 120 10k1k100 100 IOUT = 10 mA IOUT = 250 mA IOUT = 0.01 mA

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 22  Reference Data 1. Characteristics of input transient response (Ta = +25°C) 1. 1 V OUT = 2.5 V IOUT = 40 mA, CIN = 1.0 μF, VIN = 11.5 V ↔ 13.5 V, tr = tf = 5.0 μs 1. 2 V OUT = 5.0 V IOUT = 40 mA, CIN = 1.0 μF, VIN = 11.5 V ↔ 13.5 V, tr = tf = 5.0 μs VOUT [V] t [ms] VIN [V] 3.3 2.3 3.1 2.9 2.7 2.5 CL = 10.0 FVIN VOUT CL = 22.0 F VOUT [V] t [ms] VIN [V] 5.8 4.8 5.6 5.4 5.2 5.0 CL = 10.0 FVIN VOUT CL = 22.0 F 1. 3 V OUT = 16.0 V IOUT = 40 mA, CIN = 1.0 μF, VIN = 18.0 V ↔ 19.5 V, tr = tf = 5.0 μs VOUT [V] t [ms] VIN [V] 16.8 15.8 16.6 16.4 16.2 16.0 CL = 10.0 F VIN VOUT CL = 22.0 F 2. Characteristics of load transient response (Ta = +25°C) 2. 1 V OUT = 2.5 V VIN = 13.5 V, CIN = 1.0 μF, IOUT = 50 mA ↔ 100 mA 2. 2 V OUT = 5.0 V VIN = 13.5 V, CIN = 1.0 μF, IOUT = 50 mA ↔ 100 mA VOUT [V] t [ms] 2.9 2.3 150 150 2.6 2.4 2.7 2.5 2.8 100 50 100 IOUT [mA] CL = 10.0 F IOUT VOUT CL = 22.0 F VOUT [V] t [ms] 5.4 4.8 150 150 5.1 4.9 5.2 5.0 5.3 100 50 100 IOUT [mA] CL = 10.0 F IOUT VOUT CL = 22.0 F 2. 3 V OUT = 16.0 V VIN = 18.0 V, CIN = 1.0 μF, IOUT = 50 mA ↔ 100 mA VOUT [V] t [ms] 16.4 15.8 150 150 16.1 15.9 16.2 16.0 16.3 100 50 100 IOUT [mA] CL = 10.0 F IOUT VOUT CL = 22.0 F

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.1.1_00 S-1212 Series Seiko Instruments Inc. 23 3. Transient response characteristics of ON / OFF pin (Ta = +25°C) 3. 1 V OUT = 2.5 V VIN = 13.5 V, CL = 10.0 μF, CIN = 1.0 μF, IOUT = 125 mA, VON / OFF = 0 V → 13.5 V 3. 2 V OUT = 5.0 V VIN = 13.5 V, CL = 10.0 μF, CIN = 1.0 μF, IOUT = 125 mA, VON / OFF = 0 V → 13.5 V VON / OFF [V] t [ms] 6.0 0.0 9.0 3.0 12.0 15.0 3.0 12 18 VOUT [V] VOUT VON / OFF VON / OFF [V] t [ms] 6.0 0.0 9.0 3.0 12.0 15.0 3.0 12 18 VOUT [V] VOUT VON / OFF 4. Load transient response characteristics dependent on capacitance (Ta = +25°C) 4. 1 V OUT = 5.0 V VIN = 13.5 V, CIN = 1.0 μF, IOUT = 50 mA → 100 mA VIN = 13.5 V, CIN = 1.0 μF, IOUT = 100 mA → 50 mA 20 40 60 80 1000 0.20 Undershoot [V] CL [F] 0.15 0.10 0.05 0.00 20 40 60 80 1000 0.20 Overshoot [V] CL [F] 0.15 0.10 0.05 0.00 5. Input transient response characteristics dependent on capacitance (Ta = +25°C) 5. 1 V OUT = 5.0 V VIN = 7.0 V → 12.0 V, tr = 5.0 μs, CIN = 1.0 μF, IOUT = 40 mA VIN = 12.0 V → 7.0 V, tr = 5.0 μs, CIN = 1.0 μF, IOUT = 40 mA 20 40 60 80 1000 2.0 Overshoot [V] CL [μF] 1.5 1.0 0.5 0.0 20 40 60 80 1000 2.0 Undershoot [V] CL [μF] 1.5 1.0 0.5 0.0

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 24 6. Example of equivalent series resistan ce vs. Output current characteristics (Ta = +25°C) 100 0.1 250 IOUT [mA] RESR [Ω] CIN = CL = 1.0 μF Stable CIN VIN VSS CL RESR S-1212 Series VOUT ON / OFF *1. CL: TDK Corporation CGA5L3X8R1H105M (1.0 μF) Figure 15 Figure 16

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 26 1. 3 Board 3 76.2 mm 114.3 mm Figure 20 Table 14 Item Specification Thermal resistance value (θja) 42°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 1 Land pattern and wiring for testing: t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via Number: 4 Diameter: 0.3 mm 1. 4 Board 4 76.2 mm 45 mm 114.3 mm 50 mm Pattern for heat radiation Figure 21 Table 15 Item Specification Thermal resistance value (θja) 43°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer

1 Pattern for heat radiation:

45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via − 1. 5 Board 5 76.2 mm 45 mm 114.3 mm 50 mm Figure 22 Table 16 Item Specification Thermal resistance value (θja) 35°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via Number: 4 Diameter: 0.3 mm

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 28 2. 3 Board 3 76.2 mm 45 mm 114.3 mm 50 mm Figure 26 Table 19 Item Specification Thermal resistance value (θja) 51°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via − 2. 4 Board 4 76.2 mm 45 mm 114.3 mm 50 mm Figure 27 Table 20 Item Specification Thermal resistance value (θja) 48°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via Number: 4 Diameter: 0.3 mm

HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1212 Series Rev.1.1_00 Seiko Instruments Inc. 30 3. 3 Board 3 76.2 mm 45 mm 114.3 mm 50 mm Figure 31 Table 23 Item Specification Thermal resistance value (θja) 53°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via − 3. 4 Board 4 76.2 mm 45 mm 114.3 mm 50 mm Figure 32 Table 24 Item Specification Thermal resistance value (θja) 41°C/W Size 114.3 mm × 76.2 mm × t1.6 mm Material FR-4 Number of copper foil layer 4 Copper foil layer 45 mm × 50 mm × t0.070 mm 2 74.2 mm × 74.2 mm × t0.035 mm 3 74.2 mm × 74.2 mm × t0.035 mm 4 74.2 mm × 74.2 mm × t0.070 mm Thermal via Number: 4 Diameter: 0.3 mm

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