S-1121B55MC-N3OTFG

S-1111/1121 Series www.sii-ic.com N HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 DE SI G © Seiko Instruments Inc., 2002-2015 The S-1111/1121 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 low dropout voltage and large output current, and a built-in overcurrent protection circuit prevents the load current from exceeding the current capacity of the output transistor. An ON/OFF circuit ensures a long battery life, and small SOT-23-5 package realize high-density mounting. The lineup includes the S-1111 and S-1121 Series, which differ in pin configuration. NE R FO • Output current: • Ripple rejection: • Built-in overcurrent protection circuit: • Built-in ON/OFF circuit: • Operation temperature range: • Lead-free, Sn 100%, halogen-free*2 1.5 V to 5.5 V, selectable in 0.1 V step ±1.0% 200 mV typ. (3.0 V output product, IOUT = 100 mA) During operation: 35 μA typ., 65 μA max. During power-off: 0.1 μA typ., 1.0 μA max. Possible to output 150 mA (VIN ≥ VOUT(S) + 1.0 V)*1 70 dB typ. (f = 1.0 kHz) Limits overcurrent of output transistor. Ensures long battery life. Ta = −40°C to +85°C D • Output voltage: • Output voltage accuracy: • Dropout voltage: • Current consumption: W  Features DE *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. MM EN  Applications  Package NO T RE • SOT-23-5 CO • Power supply for battery-powered device • Power supply for personal communication device • Power supply for home electric/electronic appliance • Power supply for cellular phone Seiko Instruments Inc. 1 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series  Block Diagram N *1 VOUT DE SI G VIN Overcurrent protection circuit + ON/OFF circuit R Reference voltage circuit W − NE ON/OFF FO VSS D *1. Parasitic diode NO T RE CO MM EN DE Figure 1 2 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series  Product Name Structure 1. DE SI G N • Users can select the product type, output voltage for the S-1111/1121 Series. Refer to “1. Product name” regarding the contents of product name, “2. Package” regarding the package drawings, “3. Product name list” regarding details of product name. Product name (1) S-1111 Series S-1111 x xx MC - xxx TF x W Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office) Product code*2 NE IC direction in tape specifications*1 FO R Package code MC: SOT-23-5 D Output voltage 15 to 55 (e.g., when the output voltage is 1.5 V, it is expressed as 15.) MM EN DE Product type*3 A: ON/OFF pin negative logic B: ON/OFF pin positive logic NO T RE CO *1. Refer to the tape drawing. *2. Refer to “3. Product name list”. *3. Refer to “3. ON/OFF pin” in “ Operation”. Seiko Instruments Inc. 3 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series (2) S-1121 Series x xx MC - xxx TF x N S-1121 DE SI G Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office) IC direction in tape specifications*1 Package code MC: SOT-23-5 W Product code*2 NE Output voltage 15 to 55 (e.g., when the output voltage is 1.5 V, it is expressed as 15.) Package Package Name Package MP005-A-P-SD Drawing Code Tape MP005-A-C-SD NO T RE CO SOT-23-5 MM EN 2. DE D *1. Refer to the tape drawing. *2. Refer to “3. Product name list”. *3. Refer to “3. ON/OFF pin” in “ Operation”. FO R Product type*3 A: ON/OFF pin negative logic B: ON/OFF pin positive logic 4 Seiko Instruments Inc. Reel MP005-A-R-SD Rev.5.1_00 Product name list (1) S-1111 Series N 3. HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series DE SI G Table 1 NO T RE CO MM EN DE D FO R NE W Output Voltage SOT-23-5 1.5V±1.0% S-1111B15MC-NYATFx 1.6V±1.0% S-1111B16MC-NYBTFx 1.7V±1.0% S-1111B17MC-NYCTFx 1.8V±1.0% S-1111B18MC-NYDTFx 1.9V±1.0% S-1111B19MC-NYETFx 2.0V±1.0% S-1111B20MC-NYFTFx 2.1V±1.0% S-1111B21MC-NYGTFx 2.2V±1.0% S-1111B22MC-NYHTFx 2.3V±1.0% S-1111B23MC-NYITFx 2.4V±1.0% S-1111B24MC-NYJTFx 2.5V±1.0% S-1111B25MC-NYKTFx 2.6V±1.0% S-1111B26MC-NYLTFx 2.7V±1.0% S-1111B27MC-NYMTFx 2.8V±1.0% S-1111B28MC-NYNTFx 2.9V±1.0% S-1111B29MC-NYOTFx 3.0V±1.0% S-1111B30MC-NYPTFx 3.1V±1.0% S-1111B31MC-NYQTFx 3.2V±1.0% S-1111B32MC-NYRTFx 3.3V±1.0% S-1111B33MC-NYSTFx 3.4V±1.0% S-1111B34MC-NYTTFx 3.5V±1.0% S-1111B35MC-NYUTFx 3.6V±1.0% S-1111B36MC-NYVTFx 3.7V±1.0% S-1111B37MC-NYWTFx 3.8V±1.0% S-1111B38MC-NYXTFx 3.9V±1.0% S-1111B39MC-NYYTFx 4.0V±1.0% S-1111B40MC-NYZTFx 4.1V±1.0% S-1111B41MC-NZATFx 4.2V±1.0% S-1111B42MC-NZBTFx 4.3V±1.0% S-1111B43MC-NZCTFx 4.4V±1.0% S-1111B44MC-NZDTFx 4.5V±1.0% S-1111B45MC-NZETFx 4.6V±1.0% S-1111B46MC-NZFTFx 4.7V±1.0% S-1111B47MC-NZGTFx － 4.75V±1.0% 4.8V±1.0% S-1111B48MC-NZHTFx 4.9V±1.0% S-1111B49MC-NZITFx 5.0V±1.0% S-1111B50MC-NZJTFx 5.1V±1.0% S-1111B51MC-NZKTFx 5.2V±1.0% S-1111B52MC-NZLTFx 5.3V±1.0% S-1111B53MC-NZMTFx 5.4V±1.0% S-1111B54MC-NZNTFx 5.5V±1.0% S-1111B55MC-NZOTFx Remark 1. Please contact our sales office for type A products. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products. Seiko Instruments Inc. 5 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series S-1121 Series Table 2 N (2) NO T RE CO MM EN DE D FO R NE W DE SI G Output Voltage SOT-23-5 1.5V±1.0% S-1121B15MC-N2ATFx 1.6V±1.0% S-1121B16MC-N2BTFx 1.7V±1.0% S-1121B17MC-N2CTFx 1.8V±1.0% S-1121B18MC-N2DTFx 1.9V±1.0% S-1121B19MC-N2ETFx 2.0V±1.0% S-1121B20MC-N2FTFx 2.1V±1.0% S-1121B21MC-N2GTFx 2.2V±1.0% S-1121B22MC-N2HTFx 2.3V±1.0% S-1121B23MC-N2ITFx 2.4V±1.0% S-1121B24MC-N2JTFx 2.5V±1.0% S-1121B25MC-N2KTFx 2.6V±1.0% S-1121B26MC-N2LTFx 2.7V±1.0% S-1121B27MC-N2MTFx 2.8V±1.0% S-1121B28MC-N2NTFx 2.9V±1.0% S-1121B29MC-N2OTFx 3.0V±1.0% S-1121B30MC-N2PTFx 3.1V±1.0% S-1121B31MC-N2QTFx 3.2V±1.0% S-1121B32MC-N2RTFx 3.3V±1.0% S-1121B33MC-N2STFx 3.4V±1.0% S-1121B34MC-N2TTFx 3.5V±1.0% S-1121B35MC-N2UTFx 3.6V±1.0% S-1121B36MC-N2VTFx 3.7V±1.0% S-1121B37MC-N2WTFx 3.8V±1.0% S-1121B38MC-N2XTFx 3.9V±1.0% S-1121B39MC-N2YTFx 4.0V±1.0% S-1121B40MC-N2ZTFx 4.1V±1.0% S-1121B41MC-N3ATFx 4.2V±1.0% S-1121B42MC-N3BTFx 4.3V±1.0% S-1121B43MC-N3CTFx 4.4V±1.0% S-1121B44MC-N3DTFx 4.5V±1.0% S-1121B45MC-N3ETFx 4.6V±1.0% S-1121B46MC-N3FTFx 4.7V±1.0% S-1121B47MC-N3GTFx 4.75V±1.0% S-1121B4HMC-N3PTFx 4.8V±1.0% S-1121B48MC-N3HTFx 4.9V±1.0% S-1121B49MC-N3ITFx 5.0V±1.0% S-1121B50MC-N3JTFx 5.1V±1.0% S-1121B51MC-N3KTFx 5.2V±1.0% S-1121B52MC-N3LTFx 5.3V±1.0% S-1121B53MC-N3MTFx 5.4V±1.0% S-1121B54MC-N3NTFx 5.5V±1.0% S-1121B55MC-N3OTFx Remark 1. Please contact our sales office for type A products. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products. 6 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series  Pin Configuration Table SOT-23-5 Top view N 4 3 W 2 Table 4 (S-1121 Series) Pin No. Symbol Description 1 VOUT Output voltage pin 2 VSS GND pin 3 VIN Input voltage pin 4 ON/OFF ON/OFF pin 5 NC*1 No connection *1. The NC pin is electrically open. The NC pin can be connected to VIN pin or VSS pin. NE 1 (S-1111 Series) Pin No. Symbol Description 1 VIN Input voltage pin 2 VSS GND pin 3 ON/OFF ON/OFF pin 4 NC*1 No connection 5 VOUT Output voltage pin *1. The NC pin is electrically open. The NC pin can be connected to VIN pin or VSS pin. DE SI G 5 3 R 2 NO T RE CO MM EN DE D FO Figure Seiko Instruments Inc. 7 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series  Absolute Maximum Ratings Table Output voltage Power dissipation PD N Symbol VIN VON/OFF VOUT (Ta = 25 °C unless otherwise specified) Absolute Maximum Rating Unit V VSS − 0.3 to VSS + 7 V VSS − 0.3 to VIN + 0.3 V VSS − 0.3 to VIN + 0.3 300 (When not mounted on board) mW 600*1 mW −40 to +85 °C −40 to +125 °C DE SI G Item Input voltage 5 NE W Operation ambient temperature Topr Storage temperature Tstg *1. When mounted on board [Mounted on board] (1) Board size : 114.3 mm × 76.2 mm × t1.6 mm (2) Board name : JEDEC STANDARD51-7 R FO 700 600 500 200 100 DE 300 D 400 MM EN Power dissipation (PD) [mW] 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. 0 100 150 50 Ambient temperature (Ta) [°C] Power Dissipation of Package (When Mounted on Board) NO T RE CO Figure 3 0 8 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series  Electrical Characteristics Table 6 Condition Min. mA V V V V V 3 1 1 1 1 1 0.05 0.2 %/V 1 ⎯ 20 40 mV 1 ⎯ ±100 ⎯ ppm / °C 1 ⎯ 35 65 μA 2 ⎯ 0.1 1.0 1 2 2.0 ⎯ 6.5 V ⎯ 1.5 ⎯ ⎯ V 4 ⎯ ⎯ 0.3 V 4 VIN = 6.5 V, VON/OFF = 6.5 V −0.1 ⎯ 0.1 μA 4 VIN = 6.5 V, VON/OFF = 0 V −0.1 ⎯ 0.1 μA 4 ⎯ 70 ⎯ dB 5 ⎯ 250 ⎯ mA 3 Line regulation ΔVOUT1 ΔVIN• VOUT Load regulation ΔVOUT2 VIN VIN ≥ VOUT(S) + 1.0 V IOUT = 100 mA 1.5 V ≤ VOUT(S) ≤ 1.9 V 2.0 V ≤ VOUT(S) ≤ 2.4 V 2.5 V ≤ VOUT(S) ≤ 2.7 V 2.8 V ≤ VOUT(S) ≤ 3.3 V 3.4 V ≤ VOUT(S) ≤ 5.5 V VOUT(S) + 0.5 V ≤ VIN ≤ 6.5 V, IOUT = 30 mA VIN = VOUT(S) + 1.0 V, 1.0 mA ≤ IOUT ≤ 80 mA VIN = VOUT(S) + 1.0 V, IOUT = 10 mA, −40°C ≤ Ta ≤ 85°C VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, no load VIN = VOUT(S) + 1.0 V, ON/OFF pin = OFF, no load ⎯ VSH VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ VSL VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ ISH Short-circuit current Ishort R FO D DE MM EN RR Ripple rejection NE IOUT Vdrop ISL ⎯ ⎯ 0.60 0.35 0.24 0.20 0.17 Output current*2 Dropout voltage*3 ISS2 VOUT(S) Test Circuit 1 VIN = VOUT(S) + 1.0 V, IOUT = 30 mA ISS1 VOUT(S) × 0.99 150*5 ⎯ ⎯ ⎯ ⎯ ⎯ Unit V VOUT(E) ΔVOUT ΔTa • VOUT Max. VOUT(S) × 1.01 ⎯ 1.40 0.70 0.35 0.30 0.26 Output voltage*1 Output voltage *4 temperature coefficient Current consumption during operation Current consumption during power-off Input voltage ON/OFF pin input voltage “H” ON/OFF pin input voltage “L” ON/OFF pin input current “H” ON/OFF pin input current “L” Typ. DE SI G Symbol W Item N (Ta = 25 °C unless otherwise specified) VIN = VOUT(S) + 1.0 V, f = 1.0 kHz, ΔVrip = 0.5 Vrms, IOUT = 30 mA VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V NO T RE CO *1. VOUT(S): Set output voltage VOUT(E): Actual output voltage Output voltage when fixing IOUT(= 30 mA) and inputting VOUT(S) + 1.0 V *2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current. *3. Vdrop = VIN1 − (VOUT3 × 0.98) VOUT3 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. ΔV ΔVOUT [mV/°C]*1 = VOUT(S) [V]*2 × ΔTa •OUT [ppm/°C]*3 ÷ 1000 ΔTa VOUT *1. Change in temperature of 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 value may not be satisfied. Attention should be paid to the power dissipation of the package when the output current is large. This specification is guaranteed by design. Seiko Instruments Inc. 9 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series  Test Circuits 1. + V VSS + DE SI G ON/OFF A N VOUT VIN Set to ON + A VOUT VIN ON/OFF W 2. 4 VSS NE Figure Set to VIN or GND VIN ON/OFF R + VOUT A V VSS + D 3. 5 FO Figure DE Set to ON 4. VIN RE NO T 10 A ON/OFF CO + 5. 6 MM EN Figure VOUT VSS Figure VIN + V RL 7 VOUT + ON/OFF VSS V RL Set to ON Figure 8 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series  Standard Circuit Output Input N *1 CIN VOUT *2 CL ON/OFF VSS GND Single GND DE SI G VIN 9 NE Figure W *1. CIN is a capacitor for stabilizing the input. *2. A tantalum capacitor (2.2 μF or more) can be used. R Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. 1.0 μF or more 2.2 μF or more (tantalum capacitor) D Input capacitor (CIN): Output capacitor (CL): FO  Condition of Application NO T RE CO MM EN DE Caution Generally a series regulator may cause oscillation, depending on the selection of external parts. Check that no oscillation occurs with the application using the above capacitor. Seiko Instruments Inc. 11 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series  Explanation of Terms 1. Low dropout voltage regulator N This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor. DE SI G 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. 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. W *1. ΔVOUT1  ΔVIN • VOUT  NE 3. Line regulation  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. R 4. Load regulation (ΔVOUT2) D 5. Dropout voltage (Vdrop) FO Indicates the dependency of the output voltage on the output 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. NO T RE CO MM EN Vdrop = VIN1 − (VOUT3 × 0.98) DE Indicates the difference between input voltage (VIN1) 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. 12 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series ΔVOUT  ΔTa • VOUT  6. Output voltage temperature coefficient  DE SI G N The shaded area in Figure 10 is the range where VOUT varies in the operation temperature range when the output voltage temperature coefficient is ±100 ppm/°C. Example of S-1111/1121B28 typ. product VOUT [V] +0.28 mV/°C W VOUT(E)*1 +25 +85 Ta [°C] R −40 NE −0.28 mV/°C FO *1. VOUT(E) is the value of the output voltage measured at Ta = +25°C. Figure 10 NO T RE CO MM EN DE D A change in the temperature of the output voltage [mV/°C] is calculated using the following equation. ΔV ΔVOUT [mV/°C]*1 = VOUT(S) [V]*2 × ΔTa •OUT [ppm/°C]*3 ÷ 1000 ΔTa VOUT *1. Change in temperature of output voltage *2. Set output voltage *3. Output voltage temperature coefficient Seiko Instruments Inc. 13 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series  Operation 1. Basic operation N Figure 11 shows the block diagram of the S-1111/1121 Series. DE SI G The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to maintain the constant output voltage which is not influenced by the input voltage and temperature change, to the output transistor. VIN *1 W Current supply NE Error amplifier − Vref Rf FO R + Reference voltage circuit D Rs Parasitic diode MM EN 2. Output transistor Vfb DE VSS *1. VOUT Figure 11 NO T RE CO In the S-1111/1121 Series, a low on-resistance P-channel MOS FET is used as the output transistor. Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due to reverse current flowing from the VOUT pin through a parasitic diode to the VIN pin, when the potential of VOUT became higher than VIN. 14 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series 3. ON/OFF pin This pin starts and stops the regulator. Internal Circuit Operate Stop Stop Operate VOUT Pin Voltage Set value VSS level VSS level Set value Current Consumption ISS1 ISS2 ISS2 ISS1 W ON/OFF Pin “L”: ON “H”: OFF “L”: OFF “H”: ON R Product Type A A B B 7 NE Table DE SI G N 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 12. Since the ON/OFF pin is neither pulled down nor pulled up internally, do not use it in the floating status. In addition, note that the current consumption increases if a voltage of 0.3 V to VIN – 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. ON/OFF Figure MM EN VSS DE D FO VIN 12  Selection of Output Capacitor (CL) NO T RE CO The S-1111/1121 Series performs phase compensation using the 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. Therefore, always place a capacitor (CL) of 2.2 μF or more between the VOUT pin and the VSS pin. For stable operation of the S-1111/1121 Series, it is essential 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 may increase the ESR at a low temperature, causing oscillation. When using this kind of capacitor, perform thorough evaluation, including evaluation of temperature characteristics. Seiko Instruments Inc. 15 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series  Precautions NO T RE CO MM EN DE D FO R NE W DE SI G N • Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is low. When mounting an output capacitor between the VOUT pin and the VSS pin (CL) and a capacitor for stabilizing the input between the VIN pin and the VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible. • Note that generally the output voltage may increase when a series regulator is used at low load current (1.0 mA or less). • The S-1111/1121 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 recommended. Moreover, to secure stable operation of the S-1111/1121 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, resulting in oscillation. Perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics. • The voltage regulator may oscillate when the impedance 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 evaluate 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 arising out of or in connection with any infringement by products including this IC of patents owned by a third party. 16 Seiko Instruments Inc. Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series  Characteristics (Typical Data) N Remark The following, which describes the S-1111 Series as the typical product, shows typical data common to the S-1121 Series. 2 4 3.5 3 2.5 2 1.5 1 0.5 0 2.0 V 1 VOUT [V] VOUT [V] 1.5 VIN = 1.8 V 0.5 6.5 V 2.5 V 0 100 200 300 400 500 600 0 IOUT [mA] 200 300 400 500 600 R 6 6.5 V 6.0 V 3 2 1 0 100 200 300 400 500 IOUT [mA] 1.6 600 MM EN (2) Output voltage vs. Input voltage S-1111B15 (Ta = 25 °C) DE VIN = 5.3 V 0 50 mA S-1111B30 (Ta = 25 °C) 3.05 IOUT = 1 mA 1.55 30 mA 1.5 1.45 1.4 2 2.5 50 mA IOUT = 1 mA 3 2.95 30 mA 80 mA 2.9 2.85 2.8 3 3.5 2.5 RE 1.5 CO 80 mA 1 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 D 5.5 V VOUT [V] 4 FO 5 VOUT [V] 100 3.5 V VIN = 3.3 V IOUT [mA] S-1111B50 (Ta = 25 °C) VOUT [V] 6.5 V NE 0 4.0 V W 2.5 DE SI G (1) Output Voltage vs. Output current (when load current increases) S-1111B15 (Ta = 25 °C) S-1111B30 (Ta = 25 °C) VIN [V] 3 3.5 4 4.5 5 VIN [V] 5.1 5.08 5.06 5.04 5.02 5 30 mA 4.98 4.96 4.94 4.92 4.9 4.5 5 NO T VOUT [V] S-1111B50 (Ta = 25 °C) IOUT = 1 mA 50 mA 80 mA 5.5 6 6.5 7 VIN [V] Seiko Instruments Inc. 17 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series N 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 S-1111B30 0.3 25°C 85°C 85°C 0.2 -40°C 0.15 0 50 100 150 200 0 NE 0.25 25°C R 0.1 −40°C FO Vdrop [V] 85°C 0.15 0.05 100 150 200 DE IOUT [mA] D 0 50 MM EN 150 mA 100 mA 50 mA 30 mA 10 mA 0 1 CO Vdrop [V] (4) Dropout voltage vs. Set output voltage 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 2 3 100 IOUT [mA] S-1111B50 0 50 W IOUT [mA] 0.2 25°C -40°C 0.1 0.05 0 4 5 6 7 NO T RE VOUT(S) [V] 18 DE SI G 0.25 Vdrop [V] Vdrop [V] (3) Dropout voltage vs. Output current S-1111B15 Seiko Instruments Inc. 150 200 3.1 1.55 3.05 1.5 1.45 N S-1111B30 1.6 VOUT [V] VOUT [V] (5) Output voltage vs. Ambient temperature S-1111B15 3 2.95 1.4 -40 -20 0 20 40 60 80 2.9 -40 100 60 80 100 NE R 20 40 60 80 100 DE (6) Current consumption vs. Input voltage S-1111B15 MM EN S-1111B30 25°C 85°C 0 S-1111B50 2 CO −40°C 4 VIN [V] 6 8 45 40 35 30 25 20 15 10 5 0 25°C 85°C −40°C 0 2 4 VIN [V] 6 8 RE ISS1 [μA] 40 FO 0 Ta [°C] 85°C NO T ISS1 [μA] 20 D -40 -20 ISS1 [μA] VOUT [V] 5.1 5.08 5.06 5.04 5.02 5 4.98 4.96 4.94 4.92 4.9 45 40 35 30 25 20 15 10 5 0 0 Ta [°C] S-1111B50 45 40 35 30 25 20 15 10 5 0 -20 W Ta [°C] DE SI G Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series 0 2 −40°C 4 VIN [V] 25°C 6 8 Seiko Instruments Inc. 19 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1111/1121 Series (7) Ripple rejection S-1111B15 (Ta = 25 °C) S-1111B30 (Ta = 25 °C) VIN = 4.0 V, COUT = 2.2 μF Ripple Rejection [dB] 60 40 30 mA 20 0 50 mA 10 100 1k 10 k Frequency [Hz] 100 k 80 60 40 30 mA 20 0 1M S-1111B50 (Ta = 25 °C) VIN = 6.0 V, COUT = 2.2 μF IOUT = 1 mA 40 50 mA 1k 10 k 1M NO T RE CO MM EN Frequency [Hz] 100 k D 30 mA 20 100 20 10 FO 60 10 50 mA R 80 DE Ripple Rejection [dB] 100 0 IOUT = 1 mA 100 1k 10 k Frequency [Hz] W IOUT = 1 mA NE Ripple Rejection [dB] 80 DE SI G 100 100 N VIN = 2.5 V, COUT = 2.2 μF Seiko Instruments Inc. 100 k 1M Rev.5.1_00 HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR S-1111/1121 Series  Reference Data (1) Input transient response characteristics 5 3.02 4 3.015 V IN 3.01 3 V OUT 3.005 2 3 1 3 2.995 0 2.995 20 40 60 80 100 120 140 160 180 -20 0 t [μs] 0 -50 3 2.95 4 6 8 10 VOUT -100 14 -150 18 12 16 t [μs] R VOUT [V] IOUT 100 3.1 50 FO 50 D 3.1 IOUT [mA] 100 150 3.15 IOUT 3.05 0 3 -50 2.95 -100 VOUT 2.9 -2 DE VOUT [V] 3.15 2 0 100 120 140 160 180 3.2 150 0 80 VIN = 4.0 V, COUT = 4.7 μF, CIN = 1.0 μF, IOUT = 50 mA ↔100 mA 3.2 -2 60 1 NE VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF, IOUT = 50 mA ↔100 mA 2.9 40 2 t [μs] (2) Load transient response characteristics 3.05 20 3 VOUT 0 2 4 6 8 10 12 14 16 IOUT [mA] 0 3.005 4 W -20 VIN 3.01 5 VIN [V] 3.02 3.015 6 DE SI G 3.025 VOUT [V] 6 N IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 4.7 μF, CIN = 0 μF 3.025 VIN [V] VOUT [V] IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 2.2 μF, CIN = 0 μF -150 18 t [μs] S-1111B30 (Ta = 25 °C) VIN = 2.5 V, COUT = 2.2 μF, CIN = 1.0 μF VON/OFF 1.5 0 -10 0 10 20 4 1 3 0 -1 30 40 50 60 70 80 90 6 4 VON/OFF 2 2 0 VOUT 1 -2 -2 0 -4 -3 -1 -10 RE -0.5 2 VOUT 1 0.5 5 CO VOUT [V] 2 3 VON/OFF [V] 2.5 VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF VOUT [V] S-1111B15 (Ta = 25 °C) t [μs] 0 10 20 30 40 50 60 70 80 90 VON/OFF [V] MM EN (3) ON/OFF pin transient response characteristics -6 t [μs] S-1111B50 (Ta = 25 °C) NO T VIN = 6.0 V, COUT = 2.2 μF, CIN = 1.0 μF 7 8 VON/OFF 6 VOUT [V] 5 4 4 2 VOUT 3 0 2 -2 1 -4 0 -1 -10 VON/OFF [V] 6 -6 0 10 20 30 40 50 60 70 80 90 -8 t [μs] Seiko Instruments Inc. 21 N DE SI G 2.9±0.2 1.9±0.2 4 2 3 +0.1 0.16 -0.06 DE 0.95±0.1 D FO R 1 NE W 5 No. MP005-A-P-SD-1.2 NO T RE CO MM EN 0.4±0.1 TITLE No. SOT235-A-PKG Dimensions MP005-A-P-SD-1.2 SCALE UNIT mm Seiko Instruments Inc. 4.0±0.1(10 pitches:40.0±0.2) +0.1 2.0±0.05 0.25±0.1 +0.2 W DE SI G N ø1.5 -0 4.0±0.1 NE ø1.0 -0 5 Feed direction No. MP005-A-C-SD-2.1 NO T RE CO 4 MM EN 3 2 1 DE D FO R 3.2±0.2 1.4±0.2 TITLE SOT235-A-Carrier Tape No. MP005-A-C-SD-2.1 SCALE UNIT mm Seiko Instruments Inc. D FO R NE W DE SI G N 12.5max. 9.0±0.3 DE MM EN Enlarged drawing in the central part (60°) CO (60°) ø13±0.2 NO T RE No. MP005-A-R-SD-1.1 SOT235-A-Reel TITLE No. MP005-A-R-SD-1.1 SCALE QTY. UNIT mm Seiko Instruments Inc. 3,000 N DE SI G W NE R FO D DE MM EN www.sii-ic.com The information described herein is subject to change without notice. • When the products described herein are regulated products subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. • Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. • The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, vehicle equipment, in-vehicle equipment, aviation equipment, aerospace equipment, and nuclear-related equipment, without prior written permission of Seiko Instruments Inc. • • The products described herein are not designed to be radiation-proof. CO • • NO T RE 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. Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the 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.