S1131

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www.sii-ic.com HIGH RIPPLE-REJECTION AND LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR © Seiko Instruments Inc., 2002-2014 Rev.4.1_00 Seiko Instruments Inc. 1 The S-1131 Series is a positive voltage regulator with a low dropout voltage, high-accuracy output voltage, and low current consumption developed based on CMOS technology. A built-in low on-resistance transistor provides a lo w dropout voltage and large output current, and a built-in overcurrent protection circuit prevents the load current from exceeding t he current capacitance of the output transistor. An ON/OFF circuit ensures a long battery life, and small SOT-89-3, SOT-89-5 and 6-Pin HSON(A) packages realize high-density mounting. „ Features

• Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V step
• Output voltage accuracy: ±1.0%
• Dropout voltage: 250 mV typ. (3.0 V output product, IOUT = 100 mA)
• Current consumption: During operation: 35 μA typ., 65 μA max. During power-off: 0.1 μA typ., 1.0 μA max.
• Output current: Possible to output 300 mA (VIN ≥ VOUT(S) + 1.0 V)*1
• Ripple rejection: 70 dB typ. (f = 1.0 kHz)
• Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
• Built-in ON/OFF circuit: Ensures long battery life.
• Operation temperature range: Ta = −40°C to +85°C
• Lead-free, Sn 100%, halogen-free*2 *1. Attention should be paid to the power dissipation of the package when the output current is large. *2. Refer to “„ Product Name Structure” for details. „ Applications
• Constant-voltage power supply for DVD and CD-ROM drive
• Constant-voltage power supply for battery-powered device
• Constant-voltage power supply for personal communication device
• Constant-voltage power supply for note book PC „ Packages
• SOT-89-3
• SOT-89-5
• 6-Pin HSON(A)

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 3 „ Product Name Structure

• Users can select the product type, output voltage, and package type for the S-1131 Series. Refer to “1. Product name ” regarding the contents of product name, “ 2. Packages ” regarding the package drawings, “3. Product name list” regarding details of the product name. 1. Product name (1) SOT-89-3, SOT-89-5 S-1131 x xx xx - xxx TF x Output voltage 15 to 55 (e.g., when the output voltage is 1.5 V, it is expressed as 15. Package name (abbreviation) UA: SOT-89-3 UC: SOT-89-5 Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office) Product type A: ON/OFF pin negative logic B: ON/OFF pin positive logic IC direction in tape specifications Product name (abbreviation) *1. Refer to the tape drawing. *2. Refer to the product name list. *3. Refer to “3. ON/OFF pin” in “„ Operation” (Expect SOT-89-3).

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 4 (2) 6-Pin HSON(A) S-1131 x xx PD - xxx TF x Output voltage 15 to 55 (e.g., when the output voltage is 1.5 V, it is expressed as 15. Package name (abbreviation) PD: 6-Pin HSON(A) Environmental code S: Lead-free, halogen-free G: Lead-free (for details, please contact our sales office) Product type A: ON/OFF pin negative logic B: ON/OFF pin positive logic IC direction in tape specifications Product name (abbreviation) *1. Refer to the tape drawing. *2. Refer to the product name list. *3. Refer to “3. ON/OFF pin” in “„ Operation” 2. Packages Drawing Code Package Name Package Tape Reel SOT-89-3 UP003-A-P-SD UP 003-A-C-SD UP003-A-R-SD SOT-89-5 UP005-A-P-SD UP 005-A-C-SD UP005-A-R-SD 6-Pin HSON(A) PD006-A-P-SD PD006-A-C-SD PD006-A-R-SD

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 5 3. Product name list Table 1 Output voltage SOT-89-3 SOT-89-5 6-Pin HSON(A) 1.5V±1.0% S-1131B15UA-N4ATFx S-1131B 15UC-N4ATFx S-1131B15PD-N4ATFz 1.6V±1.0% S-1131B16UA-N4BTFx S-1131B 16UC-N4BTFx S-1131B16PD-N4BTFz 1.7V±1.0% S-1131B17UA-N4CTFx S-1131B 17UC-N4CTFx S-1131B17PD-N4CTFz 1.8V±1.0% S-1131B18UA-N4DTFx S-1131B 18UC-N4DTFx S-1131B18PD-N4DTFz 1.9V±1.0% S-1131B19UA-N4ETFx S-1131B 19UC-N4ETFx S-1131B19PD-N4ETFz 2.0V±1.0% S-1131B20UA-N4FTFx S- 1131B20UC-N4FTFx S-1131B20PD-N4FTFz 2.1V±1.0% S-1131B21UA-N4GTFx S-1131B 21UC-N4GTFx S-1131B21PD-N4GTFz 2.2V±1.0% S-1131B22UA-N4HTFx S-1131B 22UC-N4HTFx S-1131B22PD-N4HTFz 2.3V±1.0% S-1131B23UA-N4ITFx S-1131B 23UC-N4ITFx S-1131B23PD-N4ITFz 2.4V±1.0% S-1131B24UA-N4JTFx S-1131B 24UC-N4JTFx S-1131B24PD-N4JTFz 2.5V±1.0% S-1131B25UA-N4KTFx S-1131B 25UC-N4KTFx S-1131B25PD-N4KTFz 2.6V±1.0% S-1131B26UA-N4LTFx S-1131B 26UC-N4LTFx S-1131B26PD-N4LTFz 2.7V±1.0% S-1131B27UA-N4MTFx S-1131B 27UC-N4MTFx S-1131B27PD-N4MTFz 2.8V±1.0% S-1131B28UA-N4NTFx S-1131B 28UC-N4NTFx S-1131B28PD-N4NTFz 2.9V±1.0% S-1131B29UA-N4OTFx S-1131B 29UC-N4OTFx S-1131B29PD-N4OTFz 3.0V±1.0% S-1131B30UA-N4PTFx S-1131B 30UC-N4PTFx S-1131B30PD-N4PTFz 3.1V±1.0% S-1131B31UA-N4QTFx S-1131B 31UC-N4QTFx S-1131B31PD-N4QTFz 3.2V±1.0% S-1131B32UA-N4RTFx S-1131B 32UC-N4RTFx S-1131B32PD-N4RTFz 3.3V±1.0% S-1131B33UA-N4STFx S-1131B 33UC-N4STFx S-1131B33PD-N4STFz 3.4V±1.0% S-1131B34UA-N4TTFx S- 1131B34UC-N4TTFx S-1131B34PD-N4TTFz 3.5V±1.0% S-1131B35UA-N4UTFx S-1131B 35UC-N4UTFx S-1131B35PD-N4UTFz 3.6V±1.0% S-1131B36UA-N4VTFx S-1131B 36UC-N4VTFx S-1131B36PD-N4VTFz 3.7V±1.0% S-1131B37UA-N4WTFx S-1131B37UC-N4WTFx S-1131B37PD-N4WTFz 3.8V±1.0% S-1131B38UA-N4XTFx S-1131B 38UC-N4XTFx S-1131B38PD-N4XTFz 3.9V±1.0% S-1131B39UA-N4YTFx S-1131B 39UC-N4YTFx S-1131B39PD-N4YTFz 4.0V±1.0% S-1131B40UA-N4ZTFx S- 1131B40UC-N4ZTFx S-1131B40PD-N4ZTFz 4.1V±1.0% S-1131B41UA-N5ATFx S-1131B 41UC-N5ATFx S-1131B41PD-N5ATFz 4.2V±1.0% S-1131B42UA-N5BTFx S-1131B 42UC-N5BTFx S-1131B42PD-N5BTFz 4.3V±1.0% S-1131B43UA-N5CTFx S-1131B 43UC-N5CTFx S-1131B43PD-N5CTFz 4.4V±1.0% S-1131B44UA-N5DTFx S-1131B 44UC-N5DTFx S-1131B44PD-N5DTFz 4.5V±1.0% S-1131B45UA-N5ETFx S-1131B 45UC-N5ETFx S-1131B45PD-N5ETFz 4.6V±1.0% S-1131B46UA-N5FTFx S- 1131B46UC-N5FTFx S-1131B46PD-N5FTFz 4.7V±1.0% S-1131B47UA-N5GTFx S-1131B 47UC-N5GTFx S-1131B47PD-N5GTFz 4.8V±1.0% S-1131B48UA-N5HTFx S-1131B 48UC-N5HTFx S-1131B48PD-N5HTFz 4.9V±1.0% S-1131B49UA-N5ITFx S-1131B 49UC-N5ITFx S-1131B49PD-N5ITFz 5.0V±1.0% S-1131B50UA-N5JTFx S-1131B 50UC-N5JTFx S-1131B50PD-N5JTFz 5.1V±1.0% S-1131B51UA-N5KTFx S-1131B 51UC-N5KTFx S-1131B51PD-N5KTFz 5.2V±1.0% S-1131B52UA-N5LTFx S-1131B 52UC-N5LTFx S-1131B52PD-N5LTFz 5.3V±1.0% S-1131B53UA-N5MTFx S-1131B 53UC-N5MTFx S-1131B53PD-N5MTFz 5.4V±1.0% S-1131B54UA-N5NTFx S-1131B 54UC-N5NTFx S-1131B54PD-N5NTFz 5.5V±1.0% S-1131B55UA-N5OTFx S-1131B 55UC-N5OTFx S-1131B55PD-N5OTFz Remark 1. Please contact our sales office for type A products. 2. x: G or U z: G or S 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 6 „ Pin Configurations Table 2 Pin No. Symbol Description

1 VOUT Output voltage pin

2 VSS GND pin

3 VIN Input voltage pin

Pin No. Symbol Description

3 NC *1 No connection

4 ON/OFF ON/OFF pin

5 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. 5 4 1 3 2 SOT-89-5 Top view Figure 4

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 7 Table 4 Pin No. Symbol Description

4 NC *1 No connection

5 ON/OFF ON/OFF pin

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. *1. Connect the exposed thermal die pad at shadowed area to the board, and set electric potential open or VSS. However, do not use it as the function of electrode. *2. Be careful of the contact with other wires because the pinch lead has the same electric potential as VSS. 6-Pin HSON(A) Top view 6 5 4 1 2 3 Bottom view 1 2 3 6 5 4 Figure 5 „ Absolute Maximum Ratings Table 5 (Ta = 25°C unless otherwise specified) Item Symbol Absolute Maximum Rating Unit VIN VSS − 0.3 to VSS + 7 V Input voltage VON/OFF VSS − 0.3 to VIN + 0.3 V Output voltage VOUT VSS − 0.3 to VIN + 0.3 V SOT-89-3 500 mW SOT-89-5 500 mW Power dissipation 6-Pin HSON(A) P D 500 mW Operation ambient temperature Topr −40 to +85 °C Storage temperature Tstg −40 to +125 °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.

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 8 „ Electrical Characteristics Table 6 (Ta = 25°C unless otherwise specified) Item Symbol Conditions Min. Typ. Max. Unit Test Circuit VOUT(E)1 VIN = VOUT(S) + 1.0 V, IOUT = 30 mA VOUT(S) × 0.99 VOUT(S) VOUT(S) × 1.01 V 1 Output voltage*1 VOUT(E)2 VIN = VOUT(S) + 1.0 V, IOUT = 80 mA VOUT(S) × 0.98 VOUT(S) VOUT(S) × 1.02 V 1 Output current*2 IOUT VIN ≥ VOUT(S) + 1.0 V 300*5 ⎯ ⎯ mA 3 VOUT(S) = 1.5 V ⎯ 1.00 1.05 V 1 VOUT(S) = 1.6 V ⎯ 0.90 0.95 V 1 VOUT(S) = 1.7 V ⎯ 0.80 0.85 V 1 VOUT(S) = 1.8 V ⎯ 0.70 0.75 V 1 VOUT(S) = 1.9 V ⎯ 0.60 0.65 V 1 VOUT(S) = 2.0 V ⎯ 0.50 0.60 V 1 VOUT(S) = 2.1 V ⎯ 0.40 0.55 V 1 2.2 V ≤ VOUT(S) ≤ 2.5 V ⎯ 0.30 0.49 V 1 2.6 V ≤ VOUT(S) ≤ 3.3 V ⎯ 0.25 0.34 V 1 Dropout voltage*3 Vdrop I OUT = 100 mA 3.4 V ≤ VOUT(S) ≤ 5.5 V ⎯ 0.20 0.28 V 1 Line regulation OUTIN OUT1 V V V

• Δ Δ VOUT(S) + 0.5 V ≤ VIN ≤ 6.5 V, IOUT = 80 mA ⎯ 0.05 0.2 %/V 1 Load regulation ΔVOUT2 VIN = VOUT(S) + 1.0 V, 1.0 mA ≤ IOUT ≤ 80 mA ⎯ 20 40 mV 1 Output voltage temperature coefficient*4 OUT OUT V Ta V
• Δ Δ VIN = VOUT(S) + 1.0 V, IOUT = 10 mA, /°C 1 Current consumption during operation ISS1 VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, no load ⎯ 35 65 μA 2 Input voltage VIN ⎯ 2.0 ⎯ 6.5 V ⎯ Ripple rejection RR VIN = VOUT(S) + 1.0 V, f = 1.0 kHz, ΔVrip = 0.5 Vrms, IOUT = 80 mA ⎯ 70 ⎯ dB 5 Short-circuit current I short VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V ⎯ 450 ⎯ mA 3 Current consumption during power-off I SS2 VIN = VOUT(S) + 1.0 V, ON/OFF pin = OFF, no load ⎯ 0.1 1.0 μA 2 ON/OFF pin input voltage “H” V SH VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ 1.5 ⎯ ⎯ V 4 ON/OFF pin input voltage “L” V SL VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ ⎯ ⎯ 0.3 V 4 ON/OFF pin input current “H” I SH V IN = 6.5 V, VON/OFF = 6.5 V −0.1 ⎯ 0.1 μA 4 ON/OFF pin input current “L” I SL V IN = 6.5 V, VON/OFF = 0 V −0.1 ⎯ 0.1 μA 4 *1. VOUT(S): Set output voltage VOUT(E)1: Actual output voltage Output voltage when fixing I OUT(= 30 mA) and inputting VOUT(S) + 1.0 V V OUT(E)2: Actual output voltage Output voltage when fixing I OUT(= 80 mA) and inputting VOUT(S) + 1.0 V *2. The output current at which the output voltage becomes 95% of VOUT(E)1 after gradually increasing the output current. *3. Vdrop = VIN1 − (VOUT3 × 0.98) V OUT3 is the output voltage when VIN = VOUT(S) + 1.0 V and IOUT = 100 mA. VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage. *4. A change in the temperature of the output voltage [mV/°C] is calculated using the following equation. ΔVOUT ΔTa []mV/°C *1 = VOUT(S) []V *2 × ΔVOUT ΔTa • VOUT []ppm/°C *3 ÷ 1000 *1. Change in temperature of the output voltage *2. Set 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 val ue may not be satisfied. Attent ion should be paid to the power dissipation of the package when the output current is large. This specification is guaranteed by design.

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 10 „ Standard Circuit ON/OFF*2 VSS VOUTVIN CIN *1 CL Input Output GNDSingle GND *1. CIN is a capacitor for stabilizing the input. *2. In case of product with ON/OFF circuit. *3. A tantalum capacitor (2.2 μF or more) can be used. Figure 11 Caution The above connection diagram and cons tant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. „ Condition of Application Input capacitor (CIN): 1.0 μF or more Output capacitor (CL): 2.2 μF or more (tantalum capacitor) Caution Generally a series regulator may cause o scillation, depending on the selection of external parts. Check that no oscillation occurs with the application using the above capacitor.

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 11 „ Explanation of Terms 1. Low dropout voltage regulator This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor. 2. 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 the product. Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range of the output voltage. Refer to " „ Electrical Characteristics" and " „ Characteristics (Typical Data)" for details. 3. Line regulation ⎝ ΔVOUT1 ΔVIN • VOUT Indicates the dependency of the output voltage on the input voltage. That is, the value shows how much the output voltage changes due to a change in the input voltage with the output current remaining unchanged. 4. Load regulation (ΔVOUT2) Indicates the dependency of the output voltage on the out put current. That is, the value shows how much the output voltage changes due to a change in the output current with the input voltage remaining unchanged. 5. Dropout voltage (Vdrop) Indicates the difference between input voltage (V IN1) and the output voltage when; decreasing input voltage (VIN) gradually until the output voltage has dropped out to the value of 98% of output voltage (VOUT3), which is at VIN = VOUT(S) + 1.0 V. Vdrop = VIN1 − (VOUT3 × 0.98)

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 12 6. Output voltage temperature coefficient ⎝ ΔVOUT ΔTa • VOUT The shaded area in Figure 12 is the range where V OUT varies in the operation temperature range when the output voltage temperature coefficient is ±100 ppm/°C. VOUT(E)1 Example of S-1131B28 typ. product −40 +25 +0.28 mV/°C VOUT [V] *1. V OUT(E)1 is the value of the output voltage measured at Ta = +25°C. +85 Ta [°C] −0.28 mV/°C Figure 12 A change in the temperature of the output voltage [mV/°C] is calculated using the following equation. ΔVOUT ΔTa []mV/°C *1 = VOUT(S) []V *2 × ΔVOUT ΔTa • VOUT []ppm/°C *3 ÷ 1000 *1. Change in temperature of output voltage *2. Set output voltage *3. Output voltage temperature coefficient

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 14 3. ON/OFF pin In case of product with ON/OFF circuit, this pin starts and stops the regulator. When the ON/OFF pin is set to OFF level, the entire internal circuit stops operating, and the built-in P-channel MOS FET output transistor between the VIN pin and the VOUT pin is turned off, reducing current consumption significantly. The VOUT pin becomes the Vss level due to the internally divided resistance of several hundreds kΩ between the VOUT pin and the VSS pin. The structure of the ON/OFF pin is as shown in Figure 14. Since the ON/OFF pin is neither pulled down nor pulled up internally, do not use it in the floating st ates. In addition, note that the current consumption increases if a voltage of 0.3 V to V IN – 0.3 V is applied to the ON/OFF pin. When not using the ON/OFF pin, connect it to the VSS pin in the product A type, and connect it to the VIN pin in B type. Table 7 Product Type ON/OFF Pin Internal Circuit VOUT Pin Voltage Current Consumption A “L”: ON Operate Set value ISS1 A “H”: OFF Stop V SS level ISS2 B “L”: OFF Stop V SS level ISS2 B “H”: ON Operate Set value ISS1 VSS ON/OFF VIN Figure 14 „ Selection of Output Capacitor (CL) The S-1131 Series performs phase compensation using t he internal phase compensator in the IC and the ESR (Equivalent Series Resistance) of the output capacitor to enable stable operation independent of changes in the output load. Theref ore, always place a capacitor (C L) of 2.2 μF or more between the VOUT pin and the VSS pin. For stable operation of the S-1131 Series, it is essent ial to employ a capacitor whose ESR is within an optimum range. Using a capacitor whose ESR is outside the optimum range (approximately 0.5 Ω to 5 Ω), whether larger or smaller, may cause an unstable output, resulting in oscillation. For this reason, a tantalum electrolytic capacitor is recommended. When a ceramic capacitor or an OS capacitor with a low ESR is used, it is necessary to connect an additional resistor that serves as the ESR in series with the output capacitor. The required resistance value is approximately 0.5 Ω to 5 Ω, which varies depending on the usage conditions, so perform sufficient evaluation for selection. Ordinarily, around 1.0 Ω is recommended. Note that an aluminum electrolytic capacitor ma y increase the ESR at a low temperature, causing oscillation. When using this kind of capacitor, per form thorough evaluation, including evaluation of temperature characteristics.

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 15 „ Precautions

• Wiring patterns for the VIN pin, the VOUT pi n and GND should be designed so that the impedance is low. When mounting an output capacitor between the VOUT pin and the VSS pin (C L) and a capacitor for stabilizing the input between the VIN pin and the VSS pin (C IN), the distance from the capacitors to these pins should be as short as possible.
• Note that generally the output voltage may increase w hen a series regulator is used at low load current (1.0 mA or less).
• The S-1131 Series performs phase compensation by using an internal phase compensator and the ESR of an output capacitor. Therefore, always place a capacitor of 2.2 μF or more between the VOUT pin and the VSS pin. A tantalum type capacitor is reco mmended. Moreover, to secure stable operation of the S-1131 Series, it is necessary to employ a capacitor with an ESR within an optimum range (0.5 Ω to 5 Ω). Using a capacitor whose ESR is outside the optimum range (approximately 0.5 Ω to 5 Ω), whether larger or smaller, may cause an unstable output, resu lting in oscillation. Perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics.
• The voltage regulator may oscillate when the im pedance of the power supply is high and the input capacitance is small or an input capacitor is not connected.
• Overshoot may occur in the output voltage momentarily if the voltage is rapidly raised at power-on or when the power supply fluctuates. Sufficiently evaluat e the output voltage at power-on with the actual device.
• The application conditions for the input voltage, the output voltage, and the 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 6 in “„ Electrical Characteristics” and footnote *5 of the table.
• SII claims no responsibility for any disputes arisi ng out of or in connection with any infringement by products including this IC of patents owned by a third party.

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 16 „ Characteristics (Typical Data) (1) Output voltage vs. Output current (when load current increases) S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C) VOUT [V] 0.5 1.5 2.5 0 200 400 600 800 VIN = 1.8 V 2.0 V 2.5 V 6.5 V VOUT [V] 0.5 1.5 2.5 3.5 0 200 400 600 800 VIN = 3.3 V 3.5 V 4.0 V 6.5 V IOUT [mA] IOUT [mA] S-1131B50 (Ta = 25°C) VOUT [V] 0 200 400 600 800 VIN = 5.3 V 5.5 V 6.5 V 6.0 V IOUT [mA] Remark In determining the output current, attention should be paid to the following. 1) The minimum output current value and footnote *5 of Table 6 in the “„ Electrical Characteristics” 2) The package power dissipation (2) Output voltage vs. Input voltage S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C) VOUT [V] VOUT [V] VIN [V] VIN [V] S-1131B50 (Ta = 25°C) VOUT [V] VIN [V] 30 mA 50 mA 80 mA 1 1.5 2 2.5 3 3.5 1.6 1.55 1.5 1.45 1.4 I OUT = 1 mA 2.5 3 3.5 4 4.5 5 3.05 2.95 2.9 2.85 2.8 30 mA 50 mA 80 mA I OUT = 1 mA 4.5 5 5.5 6 6.5 7 5.1 5.08 5.06 5.04 5.02 4.98 4.96 4.94 4.92 4.9 30 mA 80 mA I OUT = 1 mA 50 mA

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 17 (3) Dropout voltage vs. Output current S-1131B15 S-1131B30 Vdrop [V] 25°C85°C –40°C 1.0 0.8 0.6 0.4 0.2 50 100 150 200 250 300 3500 Vdrop [V] 25°C 85°C 1.0 0.8 0.6 0.4 0.2 50 100 150 200 250 300 3500 –40°C IOUT [mA] IOUT [mA] S-1131B50 Vdrop [V] 25°C 85°C –40°C 1.0 0.8 0.6 0.4 0.2 50 100 150 200 250 300 3500 IOUT [mA] (4) Dropout voltage vs. Set output voltage Vdrop [V] 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 01234567 150 mA 100 mA 50 mA 30 mA 10 mA VOUT(S) [V]

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 18 (5) Output voltage vs. Ambient temperature S-1131B15 S-1131B30 VOUT [V] VOUT [V] Ta [°C] Ta [°C] S-1131B50 VOUT [V] Ta [°C] (6) Current consumption vs. Input voltage S-1131B15 S-1131B30 ISS1 [μA] ISS1 [μA] VIN [V] VIN [V] S-1131B50 ISS1 [μA] VIN [V] 0 20 40 60 100 1.55 1.5 1.45 1.4 1.6 80 −20 −40 3.05 2.95 3.1 2.9 −40 −20 02 0 40 60 80 100 5.08 5.06 5.04 5.02 4.98 4.96 4.94 4.92 4.9 −40 −20 0 20 40 60 80 100 5.1 −40°C 85°C 0 2 4 6 8 25°C 0 2 4 6 8 85°C −40°C 25°C 25°C −40°C 85°C 0 2 4 6 8

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.4.1_00 S-1131 Series Seiko Instruments Inc. 19 (7) Ripple rejection S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C) VIN = 2.5 V, COUT = 2.2 μF VIN = 4.0 V, COUT = 2.2 μF Ripple Rejection [dB] Ripple Rejection [dB] Frequency [Hz] Frequency [Hz] S-1131B50 (Ta = 25°C) VIN = 6.0 V, COUT = 2.2 μF Ripple Rejection [dB] Frequency [Hz] 100 10 100 1 k 10 k 100 k 1 M IOUT = 1 mA 30 mA 80 mA 100 10 100 1 k 10 k 100 k 1 M IOUT = 1 mA 30 mA 80 mA 10 100 1 k 10 k 100 k 1 M IOUT = 1 mA 30 mA 80 mA 100

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR S-1131 Series Rev.4.1_00 Seiko Instruments Inc. 20 „ Reference Data (1) Input transient response characteristics IOUT = 80 mA, tr = tf = 5.0 μs, COUT = 2.2 μF, CIN = 0 μF I OUT = 80 mA, tr = tf = 5.0 μs, COUT = 4.7 μF, CIN = 0 μF VOUT [V] -20 0 20 40 60 80 100 120 140 160 180 VIN VOUT VIN [V] VOUT [V] -20 0 20 40 60 80 100 120 140 160 180 VIN VOUT VIN [V] t [μs] t [μs] (2) Load transient response characteristics VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF, IOUT = 50 mA↔100 mA VIN = 4.0 V, COUT = 4.7 μF, CIN = 1.0 μF, IOUT = 50 mA↔100 mA VOUT [V] - 2 02468 1 0 1 2 1 4 1 6 1 8 VOUT IOUT IOUT [mA] VOUT [V] - 2 02468 1 0 1 2 1 4 1 6 1 8 VOUT IOUT IOUT [mA] t [μs] t [μs] (3) ON/OFF pin transient response characteristics S-1131B15 (Ta = 25°C) S-1131B30 (Ta = 25°C) VOUT [V] -10 0 10 20 30 40 50 60 70 80 90 VOUT VON/OFF VON/OFF [V] VOUT [V] -10 0 10 20 30 40 50 60 70 80 90 VOUT VON/OFF VON/OFF [V] t [μs] t [μs] S-1131B50 (Ta = 25°C) VIN = 6.0 V, COUT = 2.2 μF, CIN = 1.0 μF VOUT [V] -10 0 10 20 30 40 50 60 70 80 90 VOUT VON/OFF VON/OFF [V] t [μs] 3.02 3.015 3.01 3.005 2.995 2.99 3.02 3.015 3.01 3.005 2.995 2.99 3.2 3.15 3.1 3.05 2.95 2.9 150 100 -50 -100 -150 3.2 3.15 3.1 3.05 2.95 2.9 150 100 -50 -100 -150 2.5 1.5 0.5 -0.5

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