Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series The S-L2980 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 a large output current. A shutdown circuit ensures long battery life. Various types of output capacitors can be used in the S-L2980 series compared with the conventional CMOS voltage regulators. A small ceramic capacitor can also be used. Features • Output voltage: • High accuracy output voltage: • Low dropout voltage: • Low current consumption: • High peak current capability: • Built-in shutdown circuit: • Low ESR capacitor: • High ripple rejection: • Small package: • Lead-free products 1.5 V to 6.0 V, selectable in 0.1 V steps ±2.0 % accuracy 120 mV typ. (at 3.0 V output product, IOUT=50 mA) During operation: 90 μA typ., 140 μA max. During shutdown: 0.1 μA typ., 1.0 μA max. 150 mA output is possible. (at VIN≥VOUT(S)+1.0 V)*1 Ensure long battery life. A 1.0 μF capacitor can be used as the output capacitor. (A 2.2 μF capacitor can be used as the output capacitor for the products whose output voltage is 1.7 V or less.) 70 dB typ. (at 1.0 kHz) SOT-23-5 *1. Attention should be paid to the power dissipation of the package when the load 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 Package Package Name SOT-23-5 Package MP005-A Drawing Code Tape MP005-A Seiko Instruments Inc. Reel MP005-A 1 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 Block Diagram *1 VIN VOUT + Shutdown circuit ON/OFF − Reference voltage circuit VSS *1. Parasitic diode Figure 1 2 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Product Name Structure • The product types and output voltage for S-L2980 Series can be selected at the user’s request. Refer to the “1. Product Name” for the construction of the product name and “2. Product Name List” for the full product names. 1. Product Name S-L2980 x xx MC - TF - G IC direction in tape specifications*1 Package name (abbreviation) MC: SOT-23-5 Output voltage 15 to 60 (e.g. When the output voltage is 1.5 V, it is expressed as 15.) Product type*2 A: ON/OFF pin positive logic B: ON/OFF pin negative logic *1. Refer to the taping specifications. *2. Refer to the “3. Shutdown Pin (ON/OFF Pin)” in the “ Operation”. Seiko Instruments Inc. 3 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series 2. Product Name List Table 1 Output Voltage SOT-23-5 1.5 V ±2.0 % S-L2980A15MC-TF-G 1.6 V ±2.0 % S-L2980A16MC-TF-G 1.7 V ±2.0 % S-L2980A17MC-TF-G 1.8 V ±2.0 % S-L2980A18MC-TF-G 1.9 V ±2.0 % S-L2980A19MC-TF-G 2.0 V ±2.0 % S-L2980A20MC-TF-G 2.1 V ±2.0 % S-L2980A21MC-TF-G 2.2 V ±2.0 % S-L2980A22MC-TF-G 2.3 V ±2.0 % S-L2980A23MC-TF-G 2.4 V ±2.0 % S-L2980A24MC-TF-G 2.5 V ±2.0 % S-L2980A25MC-TF-G 2.6 V ±2.0 % S-L2980A26MC-TF-G 2.7 V ±2.0 % S-L2980A27MC-TF-G 2.8 V ±2.0 % S-L2980A28MC-TF-G 2.9 V ±2.0 % S-L2980A29MC-TF-G 3.0 V ±2.0 % S-L2980A30MC-TF-G 3.1 V ±2.0 % S-L2980A31MC-TF-G 3.2 V ±2.0 % S-L2980A32MC-TF-G 3.3 V ±2.0 % S-L2980A33MC-TF-G 3.4 V ±2.0 % S-L2980A34MC-TF-G 3.5 V ±2.0 % S-L2980A35MC-TF-G S-L2980A36MC-TF-G 3.6 V ±2.0 % S-L2980A37MC-TF-G 3.7 V ±2.0 % 3.8 V ±2.0 % S-L2980A38MC-TF-G 3.9 V ±2.0 % S-L2980A39MC-TF-G 4.0 V ±2.0 % S-L2980A40MC-TF-G 4.1 V ±2.0 % S-L2980A41MC-TF-G 4.2 V ±2.0 % S-L2980A42MC-TF-G 4.3 V ±2.0 % S-L2980A43MC-TF-G 4.4 V ±2.0 % S-L2980A44MC-TF-G 4.5 V ±2.0 % S-L2980A45MC-TF-G 4.6 V ±2.0 % S-L2980A46MC-TF-G 4.7 V ±2.0 % S-L2980A47MC-TF-G 4.8 V ±2.0 % S-L2980A48MC-TF-G 4.9 V ±2.0 % S-L2980A49MC-TF-G 5.0 V ±2.0 % S-L2980A50MC-TF-G 5.1 V ±2.0 % S-L2980A51MC-TF-G 5.2 V ±2.0 % S-L2980A52MC-TF-G 5.3 V ±2.0 % S-L2980A53MC-TF-G 5.4 V ±2.0 % S-L2980A54MC-TF-G 5.5 V ±2.0 % S-L2980A55MC-TF-G 5.6 V ±2.0 % S-L2980A56MC-TF-G 5.7 V ±2.0 % S-L2980A57MC-TF-G 5.8 V ±2.0 % S-L2980A58MC-TF-G 5.9 V ±2.0 % S-L2980A59MC-TF-G 6.0 V ±2.0 % S-L2980A60MC-TF-G Remark Please contact our sales office for type B products. 4 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 Pin Configurations Table 2 SOT-23-5 Top view 5 1 Pin No. Symbol Pin 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. 4 2 3 Figure 2 Absolute Maximum Ratings Table 3 Item Symbol VIN VON/OFF VOUT PD Input voltage Output voltage Power dissipation (Ta=25 °C unless otherwise specified) Absolute Maximum Rating Unit VSS–0.3 to VSS+12 V VSS–0.3 to VSS+12 V VSS–0.3 to VIN+0.3 V 300 (When not mounted on board) mW 600*1 mW –40 to +85 °C –40 to +125 °C 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 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. 700 600 500 400 300 200 100 0 0 100 150 50 Ambient Temperature (Ta) [°C] Figure 3 Power Dissipation of Package (When Mounted on Board) Seiko Instruments Inc. 5 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 Electrical Characteristics Table 4 Item Symbol VOUT(S) × 0.98 VOUT(S) VOUT(S) × 1.02 V 1 150*5 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ 0.17 0.16 0.15 0.13 0.12 0.11 ⎯ 0.33 0.29 0.26 0.20 0.15 0.14 mA V V V V V V 3 1 1 1 1 1 1 VOUT(S)+0.5 V ≤VIN ≤10 V, IOUT=50 mA ⎯ 0.05 0.2 %/V 1 ⎯ 12 40 1 ⎯ ±100 ⎯ mV ppm/ °C ⎯ 90 140 μA 2 ⎯ 0.1 1.0 μA 2 VIN VIN=VOUT(S)+1.0 V, 1.0 mA ≤IOUT ≤80 mA VIN=VOUT(S)+1.0 V, IOUT =50 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 ⎯ 2.0 ⎯ 10 V ⎯ 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=VOUT(S)+1.0 V, VON/OFF=7.0 V –0.1 ⎯ 0.1 μA 4 ISL VIN=VOUT(S)+1.0 V, VON/OFF=0 V –0.1 ⎯ 0.1 μA 4 RR VIN=VOUT(S)+1.0 V, f = 1.0 kHz, ΔVrip=0.5 V rms, IOUT=50 mA 1.5 V ≤VOUT(S) ≤3.3 V ⎯ 70 ⎯ dB 5 3.4 V ≤VOUT(S) ≤5.0 V ⎯ 65 ⎯ dB 5 5.1 V ≤VOUT(S) ≤6.0 V ⎯ 60 ⎯ dB 5 Output voltage*1 VOUT(E) Output current*2 Dropout voltage*3 IOUT Vdrop Line regulation Load regulation Output voltage temperature coefficient*4 Current consumption during operation Current consumption when shutdown 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” Ripple rejection Condition (Ta=25 °C unless otherwise specified) Test Min. Typ. Max. Unit circuit ΔVOUT1 ΔVIN • VOUT ΔVOUT2 ΔVOUT ΔTa • VOUT ISS1 ISS2 VIN =VOUT(S)+1.0 V, IOUT=50 mA VIN ≥VOUT(S)+1.0 V IOUT = 50 mA 1.5 V ≤VOUT(S) ≤1.7 V 1.8 V ≤VOUT(S) ≤1.9 V 2.0 V ≤VOUT(S) ≤2.4 V 2.5 V ≤VOUT(S) ≤2.9 V 3.0 V ≤VOUT(S) ≤3.2 V 3.3 V ≤VOUT(S) ≤6.0 V 1 *1. VOUT(S): Specified output voltage VOUT(E): Actual output voltage at the fixed load The output voltage when fixing IOUT(=50 mA) and inputting VOUT(S)+1.0 V *2. Output current at which output voltage becomes 95 % of VOUT after gradually increasing output current. *3. Vdrop=VIN1−(VOUT×0.98) VIN1 is the input voltage at which output voltage becomes 98 % of VOUT after gradually decreasing input voltage. *4. Temperature change ratio in the output voltage [mV/°C] is calculated by using the following equation. ΔVOUT [mV/ °C]*1 = VOUT(S) [V ]*2 × ΔVOUT [ppm/ °C]*3 ÷ 1000 ΔTa ΔTa • VOUT *1. Temperature change ratio of the output voltage *2. Specified output voltage *3. Output voltage temperature coefficient *5. The output current can be supplied at least to 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 load is large. This specification is guaranteed by design. 6 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Test Circuits 1. VIN + VOUT V ON/OFF VSS A + Set to power ON Figure 4 2. + VIN A VOUT ON/OFF VSS Set to VIN or GND Figure 5 3. VIN VOUT + A V ON/OFF VSS + Set to power ON Figure 6 4. VIN + A VOUT ON/OFF VSS V + RL Figure 7 5. VIN ON/OFF VOUT + VSS V RL Set to power ON Figure 8 Seiko Instruments Inc. 7 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 Standard Circuit INPUT CIN*1 VIN CL*2 ON/OFF VSS GND Single GND *1. *2. OUTPUT VOUT CIN is a capacitor used to stabilize input. A ceramic capacitor of 1.0 μF or more can be used for CL, provided that A ceramic capacitor of 2.2 μF or more can be used for the product whose output voltage is 1.7 V or less. Figure 9 Caution The above connection diagram and constant will not guarantees successful operation. Perform through evaluation using the actual application to set the constant. Application Conditions Input capacitor (CIN): Input series resistance (RIN): Output capacitor (CL): Equivalent Series Resistance (ESR) for output capacitor: 0.47 μF or more 10 Ω or less 1.0 μF or more*1 10 Ω or less *1. If the product whose output voltage is 1.7 V or less will be used, CL is 2.2 μF or more. 8 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Technical 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 Low ESR means the Equivalent Series Resistance of a capacitor is small. The low ESR ceramics output capacitor (CL) can be used in the S-L2980 Series. A capacitor whose ESR is 10Ω or less can be used. 3. Output Voltage (VOUT) The accuracy of the output voltage is ensured at ± 2.0 % under the specified conditions of fixed input voltage*1, fixed output current, and fixed temperature. *1. Differs depending upon 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 the “ Electrical Characteristics” and “ Typical Characteristics” for details. ⎛ ΔVOUT1 ⎞ 4. Line Regulation ⎜ ⎟ ⎝ 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. 5. Load Regulation (ΔVOUT2) 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. 6. Dropout Voltage (Vdrop) Indicates the difference between the input voltage (VIN1) and output voltage when the output voltage falls to 98 % of the output voltage (VOUT(E)) by gradually decreasing the input voltage. Vdrop=VIN1–(VOUT(E)×0.98) Seiko Instruments Inc. 9 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series ( Rev.4.1_00 ) ΔVOUT ΔTa • VOUT The shadowed area in Figure 10 is the range where VOUT varies in the operating temperature range when the temperature coefficient of the output voltage is ±100 ppm/°C. 7. Temperature Coefficient of Output Voltage Example of S-L2980A28 Typ. product VOUT [V] +0.28 mV / °C VOUT(E)*1 −0.28 mV / °C −40 *1. 25 85 Ta [°C] VOUT(E) is a mesured value of output voltage at 25 °C. Figure 10 Temperature change ratio in the output voltage [mV/°C] is calculated by using the following equation. ΔVOUT [mV/ °C]*1 = VOUT(S) [V ]*2 × ΔVOUT [ppm/ °C]*3 ÷ 1000 ΔTa ΔTa • VOUT *1. Temperature change ratio of the output voltage *2. Specified output voltage *3. Output voltage temperature coefficient 10 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Operation 1. Basic Operation Figure 11 shows the block diagram of the S-L2980 Series. The error amplifier compares the reference voltage (Vref) with the Vfb, which is the output voltage resistance-divided by the feedback resistors Rs and Rf. It supplies the output transistor with the gate voltage necessary to ensure certain output voltage free of any fluctuations of input voltage and temperature. VIN *1 Current source Error amplifier Vref – VOUT Rf + Vfb Reference voltage circuit Rs VSS *1. Parasitic diode Figure 11 2. Output Transistor The S-L2980 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 broken due to inverse current flowing from VOUT pin through a parasitic diode to VIN pin. Seiko Instruments Inc. 11 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 3. Shutdown Pin (ON/OFF Pin) This pin starts and stops the regulator. When the ON/OFF pin is turned to the shutdown level, the operation of all internal circuits stops, the built-in P-channel MOS FET output transistor between VIN pin and VOUT pin is turned off to make current consumption drastically reduced. The VOUT pin becomes the Vss level due to internally divided resistance of several hundreds kΩ between the VOUT pin and VSS pin. Furthermore, 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 state. In addition, please note that 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 VIN pin in case the logic type is “A” and to the VSS pin in case of “B”. Table 5 Logic type A A B B ON/OFF pin “H”: Power on “L”: Power off “H”: Power off “L”: Power on Internal circuit Operating Stop Stop Operating VOUT pin voltage Set value VSS level VSS level Set value Current consumption ISS1 ISS2 ISS2 ISS1 VIN ON/OFF VSS Figure 12 Selection of Output Capacitor (CL) The S-L2980 series needs an output capacitor between VOUT pin and VSS pin for phase compensation. A ceramic capacitor whose capacitance is 1.0 μF or more*1 can be used. When an OS (Organic Semiconductor) capacitor, a tantalum capacitor or an aluminum electrolyte capacitor is used, the capacitance should be 2.2 μF or more and the ESR should be 10 Ω or less. The value of the output overshoot or undershoot transient response varies depending on the value of the output capacitor. Sufficient evaluation including temperature dependency in the actual environment is needed. *1. If the product whose output voltage is 1.7 V or less will be used, the capacitance should be 2.2 μF or more. 12 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Precautions • Wiring patterns for VIN pin, VOUT pin and GND pin should be designed to hold low impedance. 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 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. Input capacitor (CIN): Output capacitor (CL): Equivalent Series Resistance (ESR): Input series resistance (RIN): 0.47 μF or more 1.0 μF or more*1 10 Ω or less 10 Ω or less *1. If the product whose output voltage will be is 1.7 V or less is used, the capacitance should be 2.2 μF or more. • A voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor is small or not connected. • The application condition for 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 output current attention should be paid to the output current value specified in the Table 4 for “ Electrical Characteristics” and the footnote *5. • SII claims no responsibility for any and all disputes arising out of or in connection with any infringement of the products including this IC upon patents owned by a third party. Seiko Instruments Inc. 13 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 Typical Characteristics 1. Output voltage versus Output current (When load current increases) S-L2980A15 (Ta=25°C) S-L2980A30 (Ta=25°C) 2.0 3.5 3.0 10 V 1.0 2.5 V VIN=1.8 V 2.0 V 0.5 VOUT [V] VOUT [V] 1.5 3.0 V 5.0 V 2.5 2.0 4.0 V VIN=3.3 V 3.5 V 1.5 1.0 10 V 0.5 0.0 0.0 0 100 200 300 IOUT [mA] 400 500 0 100 200 300 400 500 IOUT [mA] S-L2980A50 (Ta=25°C) 6.0 5.0 VIN=5.3 V VOUT [V] 4.0 7.0 V 5.5 V 3.0 10 V 2.0 Remark In determining output current, attention should be paid to the followings. 6.0 V 1) The minimum output current value and footnote *5 in the Table 4 for the “ Electrical Characteristics”. 2) The package power dissipation 1.0 0.0 0 100 200 300 IOUT [mA] 400 500 2. Maximum output current versus Input voltage S-L2980A15 (Short-circuit protection included) S-L2980A30 (Short-circuit protection included) 500 500 IOUT max. [mA] IOUT max. [mA] Ta=–40°C Ta=–40°C 400 300 200 25°C 100 85°C 0 400 300 25°C 200 85°C 100 0 0 2 4 6 VIN [V] 8 10 2 4 6 VIN [V] 8 10 S-L2980A50 (Short circuit protection included) IOUT max. [mA] 500 Ta=–40°C 400 300 25°C Remark In determining output current, attention should be paid to the followings. 85°C 200 100 0 4 6 8 10 1) The minimum output current value and footnote *5 in the Table 4 for the “ Electrical Characteristics”. 2) The package power dissipation VIN [V] 14 Seiko Instruments Inc. Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series 3. Output voltage versus Input voltage S-L2980A15 (Ta=25°C) S-L2980A30 (Ta=25°C) 1.60 3.15 3.10 IOUT=1.0 mA VOUT [V] VOUT [V] 1.55 1.50 100 mA 50 mA 30 mA 1.45 1.40 1.0 1.5 IOUT=1.0 mA 3.05 3.00 2.95 100 mA 50 mA 30 mA 2.90 2.0 2.5 VIN [V] 3.0 3.5 6.5 7.0 2.85 2.5 4.0 3.5 VIN [V] 3.0 4.5 5.0 S-L2980A50 (Ta=25°C) 5.20 VOUT [V] 5.10 IOUT=1.0 mA 5.00 100 mA 50 mA 30 mA 4.90 4.80 4.5 5.0 5.5 6.0 VIN [V] 4. Dropout voltage versus Output voltage S-L2980A15 S-L2980A30 600 85°C 25°C 400 Vdrop [mV] Vdrop [mV] 500 300 200 Ta=–40°C 100 0 0 50 100 400 350 300 250 200 150 100 50 0 150 IOUT [mA] 85°C 25°C Ta=–40°C 0 50 100 IOUT [mA] 150 S-L2980A50 Vdrop [mV] 350 85°C 300 250 25°C 200 150 100 50 Ta=–40°C 0 0 50 100 IOUT [mA] 150 Seiko Instruments Inc. 15 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 5. Output voltage versus Ambient Temperature S-L2980A30 1.53 3.06 1.52 3.04 1.51 3.02 VOUT [V] VOUT [V] S-L2980A15 1.50 1.49 1.48 3.00 2.98 2.96 1.47 2.94 –50 0 50 100 –50 0 50 100 Ta [°C] Ta [°C] S-L2980A50 5.10 VOUT [V] 5.05 5.00 4.95 4.90 –50 0 50 100 Ta [°C] 6. Line regulation versus Ambient Temperature S-L2980Axx S-L2980Axx CIN=4.7 μF, CL=10 μF 40 S-L2980A30 30 S-L2980A15 20 S-L2980A50 10 CIN=4.7 μF, CL=10 μF 40 ΔVOUT2 [mV] ΔVOUT1 [mV] 7. Load regulation versus Ambient Temperature 30 S-L2980A50 S-L2980A15 20 10 S-L2980A30 0 0 –50 0 50 100 –50 50 Ta [°C] Ta [°C] 16 0 Seiko Instruments Inc. 100 Rev.4.1_00 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series 8. Threshold voltage of ON/OFF pin versus Input voltage S-L2980A15 RL=100 Ω, CIN=4.7 μF, CL=10 μF 1.5 VSH / VSL [V] 85°C 25°C Ta=–40°C 1.0 0.5 85°C 25°C Ta=–40°C 0.0 0 2 4 6 8 10 12 VIN [V] 9. Current consumption versus Input voltage S-L2980A15 S-L2980A30 80 80 25°C 60 ISS1 [μA] 100 ISS1 [μA] 100 85°C Ta=–40°C 40 25°C 85°C 60 Ta=–40°C 40 20 20 0 0 0 2 4 6 8 0 10 2 4 VIN [V] 8 6 10 VIN [V] S-L2980A50 100 ISS1 [μA] 80 25°C 85°C 60 40 Ta=–40°C 20 0 0 2 4 6 8 VIN [V] 10 10. Ripple rejection S-L2980A30 (Ta=25°C) S-L2980A50 (Ta=25°C) Ripple Rejection [dB] 100 80 IOUT =1 mA 60 40 20 0 50 mA 10 100 1k 10 k 100 k 1M VIN=6.0 V, CL=2.2 μF 100 Ripple Rejection [dB] VIN=4.0 V, CL=2.2 μF 80 IOUT =1 mA 60 40 20 0 50 mA 10 Frequency [Hz] 100 1k 10 k 100 k 1M Frequency [Hz] Seiko Instruments Inc. 17 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 Reference Data 1. Transient Response Characteristics (S-L2980A30MC, Typical data, Ta=25°C) Input voltage or Load current Overshoot Output voltage Undershoot 1-1. Power Source Fluctuation Overshoot Undershoot VIN, VON/OFF=5.0→4.0 V, IOUT=1.0 mA VIN, VON/OFF=4.0 →5.0 V, IOUT=1.0 mA VIN 3.10 3.05 4.0 VOUT 5.0 3.05 4.0 VOUT 3.0 CL=2.2 μF CL=2.2 μF TIME (20 μs / div.) TIME (20 μs / div.) Overshoot Undershoot VIN, VON/OFF=5.0→4.0 V, IOUT=50 mA VIN, VON/OFF=4.0→5.0 V, IOUT=50 mA VIN 5.0 3.05 4.0 VOUT 3.0 VOUT[V] VIN 3.10 VIN[V] VOUT[V] 3.10 5.0 3.05 4.0 VOUT 3.0 CL=2.2 μF CL=2.2 μF TIME (20 μs / div.) TIME (20 μs / div.) Seiko Instruments Inc. VIN[V] 3.0 18 VIN[V] VIN VOUT[V] 5.0 VIN[V] VOUT[V] 3.10 HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.4.1_00 1-2. Load Fluctuation Overshoot VIN, VON/OFF=4.0 V, IOUT=50 mA→1.0 mA Undershoot VIN, VON/OFF=4.0 V, IOUT=1.0 mA→50 mA IOUT 50 IOUT 3.05 1.0 VOUT IOUT[mA] 1.0 VOUT VOUT[V] 3.05 IOUT[mA] VOUT[V] 3.10 50 3.10 3.0 3.0 CL=2.2 μF CL=2.2 μF TIME (20 μs / div.) TIME (20 μs / div.) 1-3. ON/OFF Switching (S-L2980A50MC, Typical data, Ta=25°C) Overshoot VIN=6.0 V, RL=5.0 kΩ, CL=2.2 μF 6 5 4 3 VON/OFF 2 1 0 VOUT TIME (20 μs / div.) 7 VON/OFF / VOUT [V] VON/OFF / VOUT [V] 7 Undershoot VIN=6.0 V, RL=5.0 kΩ, CL=2.2 μF 6 5 VON/OFF 4 3 2 VOUT 1 0 Seiko Instruments Inc. TIME (20 μs / div.) 19 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. 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. 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, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc. 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