Rev.5.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-1112/1122 Series The S-1112/1122 Series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, 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 builtin overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor. An ON/OFF circuit ensures a long battery life. Compared with the voltage regulators using the conventional CMOS process, a larger variety of capacitors are available, including small ceramic capacitors. Small SNT-6A(H) (S-1112 Series only) and SOT-23-5 packages realize high-density mounting. In SOT-23-5, the lineup includes the S1112 and S-1122 Series, which differ in pin configuration. Features • Output voltage: • High-accuracy output voltage: • Low dropout voltage: • Low current consumption: 1.5 V to 5.5 V, selectable in 0.1 V steps. ±1.0% 190 mV typ. (3.0 V output product, IOUT = 100 mA) During operation: 50 µA typ., 90 µA max. During shutdown: 0.1 µA typ., 1.0 µA max. • High peak current capability: 150 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1 Ensures long battery life. • Built-in ON/OFF circuit: • Low ESR capacitor can be used: A ceramic capacitor of 0.47 µF or more can be used for the output capacitor. 80 dB typ. (at 1.0 kHz) • High ripple rejection: Overcurrent of output transistor can be restricted. • Built-in overcurrent protector: SNT-6A(H)(S-1112 series only), SOT-23-5 • Small package: • Lead-free products *1. Attention should be paid to the power dissipation of the package when the output current is large. Applications • Power supply for battery-powered devices • Power supply for personal communication devices • Power supply for home electric/electronic appliances • Power supply for cellular phones Packages Package name SNT-6A(H) SOT-23-5 Package PI006-A MP005-A Drawing code Tape Reel PI006-A PI006-A MP005-A MP005-A Seiko Instruments Inc. Land PI006-A 1 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Block Diagram *1 VOUT VIN Overcurrent protector + ON/OFF circuit ON/OFF − Reference voltage circuit VSS *1. Parasitic diode Figure 1 2 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Product Name Structure • The product types and output voltage for the S-1112/1122 Series can be selected at the user’s request. Refer to the “Product name” for the meanings of the characters in the product name and “Product name list” for the full product names. 1. Product name (S-1112 Series) S-1112 x xx xx - xxx TF G IC direction in tape specifications *1 Product name (abbreviation)*2 Package name (abbreviation) PI : SNT-6A(H) MC : SOT-23-5 Output voltage 15 ~ 55 (E.g., when the output voltage is 1.5 V, it is expressed as 15.) Product type*3 A : ON/OFF pin negative logic B : ON/OFF pin positive logic *1. Refer to the taping specifications at the end of this book. *2. Refer to the product name list. *3. Refer to 3. Shutdown (ON/OFF pin) in the “ Operation”. Seiko Instruments Inc. 3 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series 2. Product name list (S-1112 Series) Table 1 Output Voltage SNT-6A(H) SOT-23-5 S-1112B15PI-L6ATFG S-1112B15MC-L6ATFG 1.5 V ±1.0% S-1112B16PI-L6BTFG S-1112B16MC-L6BTFG 1.6 V ±1.0% S-1112B17PI-L6CTFG S-1112B17MC-L6CTFG 1.7 V ±1.0% S-1112B18PI-L6DTFG S-1112B18MC-L6DTFG 1.8 V ±1.0% S-1112B19PI-L6ETFG S-1112B19MC-L6ETFG 1.9 V ±1.0% S-1112B20PI-L6FTFG S-1112B20MC-L6FTFG 2.0 V ±1.0% S-1112B21PI-L6GTFG S-1112B21MC-L6GTFG 2.1 V ±1.0% S-1112B22PI-L6HTFG S-1112B22MC-L6HTFG 2.2 V ±1.0% S-1112B23PI-L6ITFG S-1112B23MC-L6ITFG 2.3 V ±1.0% S-1112B24PI-L6JTFG S-1112B24MC-L6JTFG 2.4 V ±1.0% S-1112B25PI-L6KTFG S-1112B25MC-L6KTFG 2.5 V ±1.0% S-1112B26PI-L6LTFG S-1112B26MC-L6LTFG 2.6 V ±1.0% S-1112B27PI-L6MTFG S-1112B27MC-L6MTFG 2.7 V ±1.0% S-1112B28PI-L6NTFG S-1112B28MC-L6NTFG 2.8 V ±1.0% S-1112B2JPI-L7PTFG S-1112B2JMC-L7PTFG 2.85 V ±1.0% S-1112B29PI-L6OTFG S-1112B29MC-L6OTFG 2.9 V ±1.0% S-1112B30PI-L6PTFG S-1112B30MC-L6PTFG 3.0 V ±1.0% S-1112B31PI-L6QTFG S-1112B31MC-L6QTFG 3.1 V ±1.0% S-1112B32PI-L6RTFG S-1112B32MC-L6RTFG 3.2 V ±1.0% S-1112B33PI-L6STFG S-1112B33MC-L6STFG 3.3 V ±1.0% 3.4 V ±1.0% S-1112B34PI-L6TTFG S-1112B34MC-L6TTFG 3.5 V ±1.0% S-1112B35PI-L6UTFG S-1112B35MC-L6UTFG 3.6 V ±1.0% S-1112B36PI-L6VTFG S-1112B36MC-L6VTFG S-1112B37MC-L6WTFG 3.7 V ±1.0% S-1112B37PI-L6WTFG 3.8 V ±1.0% S-1112B38PI-L6XTFG S-1112B38MC-L6XTFG 3.9 V ±1.0% S-1112B39PI-L6YTFG S-1112B39MC-L6YTFG 4.0 V ±1.0% S-1112B40PI-L6ZTFG S-1112B40MC-L6ZTFG S-1112B41PI-L7ATFG S-1112B41MC-L7ATFG 4.1 V ±1.0% S-1112B42PI-L7BTFG S-1112B42MC-L7BTFG 4.2 V ±1.0% 4.3 V ±1.0% S-1112B43PI-L7CTFG S-1112B43MC-L7CTFG 4.4 V ±1.0% S-1112B44PI-L7DTFG S-1112B44MC-L7DTFG 4.5 V ±1.0% S-1112B45PI-L7ETFG S-1112B45MC-L7ETFG 4.6 V ±1.0% S-1112B46PI-L7FTFG S-1112B46MC-L7FTFG 4.7 V ±1.0% S-1112B47PI-L7GTFG S-1112B47MC-L7GTFG 4.8 V ±1.0% S-1112B48PI-L7HTFG S-1112B48MC-L7HTFG 4.9 V ±1.0% S-1112B49PI-L7ITFG S-1112B49MC-L7ITFG S-1112B50PI-L7JTFG S-1112B50MC-L7JTFG 5.0 V ±1.0% 5.1 V ±1.0% S-1112B51PI-L7KTFG S-1112B51MC-L7KTFG 5.2 V ±1.0% S-1112B52PI-L7LTFG S-1112B52MC-L7LTFG 5.3 V ±1.0% S-1112B53PI-L7MTFG S-1112B53MC-L7MTFG 5.4 V ±1.0% S-1112B54PI-L7NTFG S-1112B54MC-L7NTFG 5.5 V ±1.0% S-1112B55PI-L7OTFG S-1112B55MC-L7OTFG Remark Please contact our sales office for type A products. 4 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series 3. Product name (S-1122 Series) S-1122 x xx MC - xxx TF G IC direction in tape specifications*1 Product name (abbreviation)*2 Package name (abbreviation) MC: SOT-23-5 Output voltage 15 to 55 (E.g., when the output voltage is 1.5 V, it is expressed as 15.) Product type*3 A: ON/OFF pin negative logic B: ON/OFF pin positive logic *1. Refer to the taping specifications at the end of this book. *2. Refer to the product name list. *3. Refer to 3. Shutdown pin (ON/OFF pin) in the “ Operation”. Seiko Instruments Inc. 5 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series 4. Product name list (S-1122 Series) Table 2 Output Voltage SOT-23-5 S-1122B15MC-L8ATFG 1.5 V ±1.0% S-1122B16MC-L8BTFG 1.6 V ±1.0% S-1122B17MC-L8CTFG 1.7 V ±1.0% S-1122B18MC-L8DTFG 1.8 V ±1.0% S-1122B19MC-L8ETFG 1.9 V ±1.0% S-1122B20MC-L8FTFG 2.0 V ±1.0% S-1122B21MC-L8GTFG 2.1 V ±1.0% S-1122B22MC-L8HTFG 2.2 V ±1.0% S-1122B23MC-L8ITFG 2.3 V ±1.0% S-1122B24MC-L8JTFG 2.4 V ±1.0% S-1122B25MC-L8KTFG 2.5 V ±1.0% S-1122B26MC-L8LTFG 2.6 V ±1.0% S-1122B27MC-L8MTFG 2.7 V ±1.0% S-1122B28MC-L8NTFG 2.8 V ±1.0% S-1122B29MC-L8OTFG 2.9 V ±1.0% S-1122B30MC-L8PTFG 3.0 V ±1.0% S-1122B31MC-L8QTFG 3.1 V ±1.0% S-1122B32MC-L8RTFG 3.2 V ±1.0% S-1122B33MC-L8STFG 3.3 V ±1.0% 3.4 V ±1.0% S-1122B34MC-L8TTFG 3.5 V ±1.0% S-1122B35MC-L8UTFG 3.6 V ±1.0% S-1122B36MC-L8VTFG 3.7 V ±1.0% S-1122B37MC-L8WTFG 3.8 V ±1.0% S-1122B38MC-L8XTFG 3.9 V ±1.0% S-1122B39MC-L8YTFG 4.0 V ±1.0% S-1122B40MC-L8ZTFG S-1122B41MC-L9ATFG 4.1 V ±1.0% S-1122B42MC-L9BTFG 4.2 V ±1.0% 4.3 V ±1.0% S-1122B43MC-L9CTFG 4.4 V ±1.0% S-1122B44MC-L9DTFG 4.5 V ±1.0% S-1122B45MC-L9ETFG 4.6 V ±1.0% S-1122B46MC-L9FTFG 4.7 V ±1.0% S-1122B47MC-L9GTFG 4.8 V ±1.0% S-1122B48MC-L9HTFG 4.9 V ±1.0% S-1122B49MC-L9ITFG S-1122B50MC-L9JTFG 5.0 V ±1.0% 5.1 V ±1.0% S-1122B51MC-L9KTFG 5.2 V ±1.0% S-1122B52MC-L9LTFG 5.3 V ±1.0% S-1122B53MC-L9MTFG 5.4 V ±1.0% S-1122B54MC-L9NTFG 5.5 V ±1.0% S-1122B55MC-L9OTFG Remark Please contact our sales office for type A products. 6 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Pin Configuration Table 3 SNT-6A(H) Top view 1 6 2 5 3 4 Figure 2 Table 4 SOT-23-5 Top view 5 1 4 2 (S-1112 Series) Pin No. Symbol Description 1 NC *1 No connection 2 VSS GND pin 3 ON/OFF Shutdown pin 4 VIN Input voltage pin 5 VSS GND pin 6 VOUT Output voltage pin *1. The NC pin is electrically open. The NC pin can be connected to VIN or VSS. (S-1112 Series) Pin No. Symbol Description 1 VIN Input voltage pin 2 VSS GND pin 3 ON/OFF Shutdown 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 or VSS. 3 Figure 3 Table 5 (S-1122 Series) Pin No. Symbol Description 1 VOUT Output voltage pin 2 VSS GND pin 3 VIN Input voltage pin 4 ON/OFF Shutdown pin 5 NC*1 No connection *1. The NC pin is electrically open. The NC pin can be connected to VIN or VSS. Seiko Instruments Inc. 7 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Absolute Maximum Ratings Table 6 Item Symbol VIN VON/OFF VOUT Input voltage Output voltage SNT-6A(H) Power dissipation PD SOT-23-5 Operating ambient temperature Topr Storage temperature Tstg *1. When mounted on board [Mounted board] (1) Board size : 114.3 mm × 76.2 mm × t1.6 mm (2) Board name : JEDEC STANDARD51-7 (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 + 0.3 500*1 mW 300 (When not mounted on board) mW mW 600*1 °C −40 to +85 °C −40 to +125 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. 700 600 SOT-23-5 500 400 300 200 SNT-6A(H) 100 0 0 150 100 50 Ambient temperature (Ta) [°C] Figure 4 Power Dissipation of The Package (When Mounted on Board) 8 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Electrical Characteristics Table 7 (Ta = 25°C unless otherwise specified) Item Output voltage*1 *2 Symbol VOUT(E) Conditions VIN = VOUT(S) + 1.0 V, IOUT = 30 mA Unit Test Circuit V 1 mA V V V V V 3 1 1 1 1 1 0.2 %/V 1 12 40 mV 1 ±100 ppm/ °C 1 50 90 µA 2 0.1 1.0 µA 2 2.0 6.5 V Min. Typ. Max. VOUT(S) × 0.99 150*5 VOUT(S) 0.32 0.28 0.25 0.20 0.19 VOUT(S) × 1.01 0.55 0.47 0.35 0.29 0.26 0.05 VIN VIN ≥ VOUT(S) + 1.0 V IOUT = 100 mA 1.5 V ≤ VOUT(S) ≤ 1.6 V 1.7 V ≤ VOUT(S) ≤ 1.8 V 1.9 V ≤ VOUT(S) ≤ 2.3 V 2.4 V ≤ VOUT(S) ≤ 2.7 V 2.8 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 1.5 V 4 VSL VIN = VOUT(S) + 1.0 V, RL = 1.0 kΩ 0.3 V 4 ISH VIN = 6.5 V, VON/OFF = 6.5 V −0.1 0.1 µA 4 ISL VIN = 6.5 V, VON/OFF = 0 V −0.1 0.1 µA 4 Ripple rejection RR 80 dB 5 Short-circuit current Ishort VIN = VOUT(S) + 1.0 V, f = 1.0 kHz, ∆Vrip = 0.5 Vrms, IOUT = 30 mA VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V 200 mA 3 Output current Dropout voltage*3 IOUT Vdrop Line regulation ∆VOUT1 ∆VIN• VOUT Load regulation ∆VOUT2 Output voltage temperature coefficient*4 Current consumption during operation Current consumption during shutdown Input voltage Shutdown pin input voltage “H” Shutdown pin input voltage “L” Shutdown pin input current “H” Shutdown pin input current “L” ∆VOUT ∆Ta • VOUT ISS1 ISS2 *1. VOUT(S): Specified output voltage VOUT(E): Actual output voltage at the fixed load The 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. The change in temperature [mV/°C] is calculated using the following equation. ∆VOUT [mV / °C]*1 = VOUT(S)[ V ]*2 × ∆VOUT [ppm / °C]*3 ÷ 1000 ∆Ta ∆Ta • VOUT *1. The change in temperature of the output voltage *2. Specified 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 AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Test Circuits 1. + VOUT VIN ON/OFF V VSS A + Set to power ON Figure 5 2. + A VIN ON/OFF VOUT VSS Set to VIN or GND Figure 6 3. VIN VOUT ON/OFF + A V VSS + Set to power ON Figure 7 4. VIN + A VOUT + ON/OFF VSS V RL Figure 8 5. VIN ON/OFF VOUT VSS V + RL Set to Power ON Figure 9 10 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Standard Circuit Output Input VIN *1 CIN VOUT ON/OFF VSS Single GND *2 CL GND *1. CIN is a capacitor for stabilizing the input. *2. A ceramic capacitor of 0.47 µF or more can be used for CL. Figure 10 Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. Application Conditions Input capacitor (CIN): Output capacitor (CL): ESR of output capacitor: 1.0 µF or more 0.47 µF or more 10 Ω or less Caution A general series regulator may oscillate, depending on the external components selected. Check that no oscillation occurs with the application using the above capacitor. Seiko Instruments Inc. 11 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Explanation of Terms 1. Low dropout voltage regulator The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in low on-resistance transistor. 2. Low ESR A capacitor whose ESR (Equivalent Series Resistance) is low. The S-1112/1122 Series enables use of a low ESR capacitor, such as a ceramic capacitor, for the output-side capacitor CL. A capacitor whose ESR is 10 Ω or less can be used. 3. 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. Please see the electrical characteristics and attached characteristics data for details. ∆VOUT1 ∆V IN • VOUT 4. Line regulation Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output voltage changes due to a change in the input voltage with the output current remaining unchanged. 5. Load regulation (∆VOUT2) Indicates the dependency of the output voltage on the output current. That is, the values show how much the output voltage changes due to a change in the output current with the input voltage remaining unchanged. 6. Dropout voltage (Vdrop) Indicates the difference between the input voltage VIN1, which is the input voltage (VIN) at the point where the output voltage has fallen to 98% of the output voltage value VOUT3 after VIN was gradually decreased from VIN = VOUT(S) + 1.0 V, and the output voltage at that point (VOUT3 × 0.98). Vdrop = VIN1 − (VOUT3 × 0.98) 12 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series ∆VOUT 7. Temperatur e coefficient of output voltage ∆Ta • VOUT The shadowed area in Figure 11 is the range where VOUT varies in the operating temperature range when the temperature coefficient of the output voltage is ±100 ppm/°C. Ex. S-1112/1122B28 Typ. VOUT [V] +0.28 mV / °C VOUT(E)*1 −0.28 mV / °C −40 *1. 25 85 Ta [°C] VOUT(E) is the value of the output voltage measured at 25°C. Figure 11 A change in the temperature of the output voltage [mV/°C] is calculated using the following equation. ∆VOUT [mV / °C]*1 = VOUT(S)[ V ]*2 × ∆VOUT [ppm / °C]*3 ÷ 1000 ∆Ta • VOUT ∆Ta *1. Change in temperature of output voltage *2. Specified output voltage *3. Output voltage temperature coefficient Seiko Instruments Inc. 13 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Operation 1. Basic operation Figure 12 shows the block diagram of the S-1112/1122 Series. The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistancedivided by feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage necessary to ensure a certain output voltage free of any fluctuations of input voltage and temperature. VIN *1 Current supply Error amplifier VOUT Vref − Rf + Vfb Reference voltage circuit Rs VSS *1. Parasitic diode Figure 12 2. Output transistor The S-1112/1122 Series uses a low on-resistance P-channel MOS FET 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 inverse current flowing from VOUT pin through a parasitic diode to VIN pin. 14 Seiko Instruments Inc. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series 3. Shutdown pin (ON/OFF pin) This pin starts and stops the regulator. When the ON/OFF pin is set to the shutdown level, the operation of all internal circuits stops, and the builtin P-channel MOS FET output transistor between the VIN pin and VOUT pin is turned off to substantially reduce the current consumption. The VOUT pin becomes the VSS level due to the internally divided resistance of several MΩ between the VOUT pin and VSS pin. The structure of the ON/OFF pin is as shown in Figure 13. Since the ON/OFF pin is neither pulled down nor pulled up internally, do not use it in the floating state. 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 the ON/OFF pin is not used, connect it to the VSS pin if the logic type is “A” and to the VIN pin if it is “B”. Table 8 Logic Type ON/OFF Pin Internal Circuits VOUT Pin Voltage Current Consumption A “L”: Power on Operating Set value ISS1 A “H”: Power off Stopped VSS level ISS2 B “L”: Power off Stopped VSS level ISS2 B “H”: Power on Operating Set value ISS1 VIN ON/OFF VSS Figure 13 Selection of Output Capacitor (CL) The S-1112/1122 Series requires an output capacitor between the VOUT and VSS pins for phase compensation. A ceramic capacitor with a capacitance of 0.47 µF or more can be used. Even if using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, a capacitance of 0.47 µF or more and an ESR of 10 Ω or less are required. The value of the output overshoot or undershoot transient response varies depending on the value of the output capacitor. When selecting the output capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual device. Seiko Instruments Inc. 15 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Precautions • Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low. When mounting an output capacitor between the VOUT and VSS pins (CL) and a capacitor for stabilizing the input between VIN and VSS pins (CIN), the distance from the capacitors to these pins should be as short as possible. • Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or less). • Generally a series regulator may cause oscillation, depending on the selection of external parts. The following conditions are recommended for this IC. However, be sure to perform sufficient evaluation under the actual usage conditions for selection, including evaluation of temperature characteristics. 1.0 µF or more Input capacitor (CIN): 0.47 µF or more Output capacitor (CL): Equivalent series resistance (ESR): 10 Ω or less • The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor is small or an input capacitor is not connected. • The application conditions for the input voltage, output voltage, and 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 7 in the “ 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. HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Characteristics (Typical Data) Remark The following, which describes the S-1112 Series as the typical product, shows typical data common to the S-1122 Series. (1) Output Voltage vs. Output current (when load current increases) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 S-1112B30 (Ta = 25°C) 3.5 3.0 2.5 6.5 V VIN = 1.8 V VOUT [V] VOUT [V] S-1112B15 (Ta = 25°C) 2.5 V 100 200 300 400 500 6.5 V 1.5 1.0 4.0 V 0.5 0 0 VIN = 3.3 V 2.0 600 0 100 IOUT [mA] 200 400 300 500 600 IOUT [mA] S-1112B50 (Ta = 25°C) 6 5 VOUT [V] 4 VIN = 5.3 V 3 6.0 V 2 6.5 V 1 0 0 100 200 300 400 500 600 Remark In determining the output current, attention should be paid to the following. 1) The minimum output current value and footnote *5 in the “ Electrical Characteristics” 2) The package power dissipation IOUT [mA] (2) Output voltage vs. Input voltage S-1112B30 (Ta = 25°C) 1.6 3.1 1.5 3.0 1.4 2.9 IOUT = 1 mA 30 mA 50 mA 1.3 1.2 1.1 1.0 1.0 VOUT [V] VOUT [V] S-1112B15 (Ta = 25°C) 1.5 2.0 IOUT = 1 mA 30 mA 50 mA 2.8 2.7 2.6 2.5 3.0 3.5 2.5 2.5 VIN [V] 3.0 3.5 4.0 4.5 5.0 VIN [V] S-1112B50 (Ta = 25°C) 5.5 VOUT [V] 5.0 4.5 4.0 IOUT = 1 mA 50 mA 3.5 30 mA 3.0 2.5 2.0 3.0 4.0 5.0 6.0 7.0 VIN [V] Seiko Instruments Inc. 17 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series (3) Dropout voltage vs. Output current 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 S-1112B30 85°C 25°C Vdrop [V] Vdrop [V] S-1112B15 –40°C 0 50 100 200 150 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 IOUT [mA] Vdrop [V] 85°C 25°C –40°C 0 50 100 200 150 IOUT [mA] Vdrop [V] (4) Dropout voltage vs. Set output voltage 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 150 mA 100 mA 50 mA 30 mA 10 mA 0 1 2 3 4 5 6 7 VOTA [V] 18 Seiko Instruments Inc. 25°C –40°C 0 50 100 IOUT [mA] S-1112B50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 85°C 150 200 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series (5) Output voltage vs. Ambient temperature S-1112B15 S-1112B30 1.60 VOUT [V] VOUT [V] 1.55 1.50 1.45 1.40 –50 0 –25 25 50 75 100 3.20 3.15 3.10 3.05 3.00 2.95 2.90 2.85 2.80 –50 –25 0 Ta [°C] 25 50 75 100 Ta [°C] S-1112B50 5.3 5.2 VOUT [V] 5.1 5.0 4.9 4.8 4.7 –50 25 0 –25 50 75 100 Ta [°C] (6) Current consumption vs. Input voltage S-1112B30 120 120 100 100 80 80 ISS1 [µA] ISS1 [µA] S-1112B15 25°C 60 85°C 40 –40°C 20 0 25°C 85°C –40°C 60 40 20 0 2 0 4 6 8 0 VIN [V] 2 4 6 8 VIN [V] S-1112B50 120 ISS1 [µA] 100 25°C 80 –40°C 60 40 85°C 20 0 0 2 4 6 8 VIN [V] Seiko Instruments Inc. 19 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series (7) Ripple rejection S-1112B15 (Ta = 25°C) S-1112B30 (Ta = 25°C) VIN = 2.5 V, COUT = 0.47 µF VIN = 4.0 V, COUT = 0.47 µF 100 50 mA 80 60 Ripple Rejection [dB] Ripple Rejection [dB] 100 IOUT = 1 mA 30 mA 40 20 0 10 100 1k 10k 100k 1M 20 0 10 Ripple Rejection [dB] 100 80 IOUT = 1 mA 30 mA 20 0 10 100 1k 10k 100k 1M Frequency [Hz] 20 100 1k 10k Frequency [Hz] VIN = 6.0 V, COUT = 0.47 µF 40 30 mA 40 S-1112B50 (Ta = 25°C) 50 mA IOUT = 1 mA 60 Frequency [Hz] 60 50 mA 80 Seiko Instruments Inc. 100k 1M HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series Reference Data (1) Input transient response characteristics S-1112B15 (Ta = 25°C) S-1112B30 (Ta = 25°C) -40 -20 0 20 40 60 6 3.08 3.06 3.04 3.02 3.00 5 VIN 4 3 VOUT 2 1 2.98 2.96 -40 80 100 120 140 160 VIN [V] 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 VOUT [V] 1.62 1.60 1.58 VIN 1.56 1.54 1.52 VOUT 1.50 1.48 1.46 IOUT = 30 mA, tr = tf = 5.0 µs, COUT = 0.47 µF, CIN = 0 µF VIN [V] VOUT [V] IOUT = 30 mA, tr = tf = 5.0 µs, COUT = 0.47 µF, CIN = 0 µF -20 0 20 40 t [µs] 60 0 80 100 120 140 160 t [µs] S-1112B50 (Ta = 25°C) 5.12 5.10 VIN 5.08 5.06 5.04 5.02 VOUT 5.00 4.98 4.96 -40 -20 0 20 40 60 8 7 6 5 4 3 2 1 0 VIN [V] VOUT [V] IOUT = 30 mA, tr = tf = 5.0 µs, COUT = 0.47 µF, CIN = 0 µF 80 100 120 140 160 t [µs] (2) Load transient response characteristics S-1112B15 (Ta = 25°C) S-1112B30 (Ta = 25°C) VIN = 2.5 V, COUT = 0.47 µF, CIN = 1.0 µF, IOUT = 50↔100 mA VIN = 4.0 V, COUT = 0.47 µF, CIN = 1.0 µF, IOUT = 50↔100 mA 1.55 1.50 3.10 0 20 40 60 100 IOUT 50 3.05 VOUT 0 3.00 –50 –100 2.95 –100 –150 2.90 –50 1.45 -40 -20 3.15 50 0 VOUT 1.40 100 150 -40 -20 80 100 120 140 160 t [µs] IOUT [mA] 1.60 IOUT 3.20 VOUT [V] VOUT [V] 1.65 150 IOUT [mA] 1.70 –150 0 20 40 60 80 100 120 140 160 t [µs] S-1112B50 (Ta = 25°C) VIN = 6.0 V, COUT = 0.47 µF, CIN = 1.0 µF, IOUT = 50↔100 mA 5.20 150 5.10 5.05 5.00 100 IOUT 50 0 VOUT –50 –100 4.95 4.90 -40 -20 IOUT [mA] VOUT [V] 5.15 –150 0 20 40 60 80 100 120 140 160 t [µs] Seiko Instruments Inc. 21 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-1112/1122 Series (3) Shutdown pin transient response characteristics S-1112B15 (Ta = 25°C) S-1112B30 (Ta = 25°C) VIN = 2.5 V, COUT = 0.47 µF, CIN = 1.0 µF, IOUT = 100 mA VIN = 4.0 V, COUT = 0.47 µF, CIN = 1.0 µF, IOUT = 100 mA VOUT [V] 0 –1 8 1 2 1 2 0 –1 VOUT -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 4 VON/OFF 6 2 4 2 –2 0 –3 –2 t [ms] 22 6 0 –2 VOUT -0.4 -0.2 –4 0 0.2 0.4 0.6 0.8 t [ms] Seiko Instruments Inc. 1.0 1.2 1.4 1.6 –6 VON/OFF [V] VON/OFF 3 10 VOUT [V] 4 3 VON/OFF [V] 5 1.57±0.03 6 5 1 2 4 +0.05 0.08 -0.02 3 0.5 0.48±0.02 0.2±0.05 No. PI006-A-P-SD-2.0 TITLE SNT-6A(H)-A-PKG Dimensions PI006-A-P-SD-2.0 No. SCALE UNIT mm Seiko Instruments Inc. +0.1 ø1.5 -0 4.0±0.1 2.0±0.05 0.25±0.05 +0.1 1.85±0.05 5° ø0.5 -0 4.0±0.1 0.65±0.05 3 2 1 4 5 6 Feed direction No. PI006-A-C-SD-1.0 TITLE SNT-6A(H)-A-Carrier Tape PI006-A-C-SD-1.0 No. SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.0±0.3 Enlarged drawing in the central part ø13±0.2 (60°) (60°) No. PI006-A-R-SD-1.0 TITLE SNT-6A(H)-A-Reel No. PI006-A-R-SD-1.0 SCALE UNIT QTY. mm Seiko Instruments Inc. 5,000 0.52 1.36 0.52 0.3 Caution 0.2 0.3 0.2 0.3 Making the wire pattern under the package is possible. However, note that the package may be upraised due to the thickness made by the silk screen printing and of a solder resist on the pattern because this package does not have the standoff. No. PI006-A-L-SD-3.0 TITLE SNT-6A(H)-A-Land Recommendation PI006-A-L-SD-3.0 No. SCALE UNIT mm Seiko Instruments Inc. 2.9±0.2 1.9±0.2 4 5 1 2 +0.1 0.16 -0.06 3 0.95±0.1 0.4±0.1 No. MP005-A-P-SD-1.2 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 ø1.5 -0 2.0±0.05 +0.2 ø1.0 -0 0.25±0.1 4.0±0.1 1.4±0.2 3.2±0.2 3 2 1 4 5 Feed direction No. MP005-A-C-SD-2.1 TITLE SOT235-A-Carrier Tape No. MP005-A-C-SD-2.1 SCALE UNIT mm Seiko Instruments Inc. 12.5max. 9.0±0.3 Enlarged drawing in the central part ø13±0.2 (60°) (60°) 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 • • • • • • The information described herein is subject to change without notice. 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