SL2980

SL2980 SII | Alldatasheet

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www.sii-ic.com HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR © Seiko Instruments Inc., 2001-2012 Rev.5.1_00 Seiko Instruments Inc. 1 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 ON/OFF circuit ensures long battery life. Various types of output capacitors can be used in th e S-L2980 Series compared with the conventional CMOS voltage regulators. A small ceramic capacitor can also be used. „ Features

• Output voltage: 1.5 V to 6.0 V, selectable in 0.1 V steps
• Output voltage accuracy: ±2.0 %
• Dropout voltage: 120 mV typ. (3.0 V output product, IOUT=50 mA)
• Current consumption: During operation: 90 μA typ., 140 μA max. During power-off: 0.1 μA typ., 1.0 μA max.
• Output current: Possible to output 150 mA (VIN≥VOUT(S)+1.0 V)*1
• Output capacitor: A ceramic capacitor of 1.0 μF or more can be used. (A ceramic capacitor of 2.2 μF or more can be used for the products whose output voltage is 1.7 V or less.)
• Ripple rejection: 70 dB typ. (f=1.0 kHz)
• 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 load is large. *2. Refer to “„ Product Name Structure” for details. „ Applications
• Power supply for battery-powered device
• Power supply for personal communication device
• Power supply for home electric/electronic appliance
• Power supply for cellular phone „ Package
• SOT-23-5

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 2 „ Block Diagram VIN VSS VOUT ON/OFF *1. Parasitic diode − ON/OFF circuit Reference voltage circuit Figure 1

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 3 „ 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 meanings of the characters in the product name, “2. Package” regarding the package drawings and “3. Product Name List” for the full product names. 1. Product Name S - L 2 9 8 0 x x x M C - T F - x Output voltage 15 to 60 (e.g. when the output voltage is 1.5 V, it is ex pressed as 15.) IC direction in tape specifications*1 Package name (abbreviation) MC: SOT-23-5 Product type*2 A: ON/OFF pin positive logic B: ON/OFF pin negative logic Environmental code U: Lead-free (Sn 100%), halogen-free G: Lead-free (for details, please contact our sales office) *1. Refer to the tape drawing. *2. Refer to the “3. ON/OFF Pin” in the “„ Operation”. 2. Package Drawing Code Package Name Package Tape Reel SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 4 3. Product Name List Table 1 Output Voltage SOT-23-5 1.5 V ±2.0 % S-L2980A15MC-TF-x 1.6 V ±2.0 % S-L2980A16MC-TF-x 1.7 V ±2.0 % S-L2980A17MC-TF-x 1.8 V ±2.0 % S-L2980A18MC-TF-x 1.9 V ±2.0 % S-L2980A19MC-TF-x 2.0 V ±2.0 % S-L2980A20MC-TF-x 2.1 V ±2.0 % S-L2980A21MC-TF-x 2.2 V ±2.0 % S-L2980A22MC-TF-x 2.3 V ±2.0 % S-L2980A23MC-TF-x 2.4 V ±2.0 % S-L2980A24MC-TF-x 2.5 V ±2.0 % S-L2980A25MC-TF-x 2.6 V ±2.0 % S-L2980A26MC-TF-x 2.7 V ±2.0 % S-L2980A27MC-TF-x 2.8 V ±2.0 % S-L2980A28MC-TF-x 2.9 V ±2.0 % S-L2980A29MC-TF-x 3.0 V ±2.0 % S-L2980A30MC-TF-x 3.1 V ±2.0 % S-L2980A31MC-TF-x 3.2 V ±2.0 % S-L2980A32MC-TF-x 3.3 V ±2.0 % S-L2980A33MC-TF-x 3.4 V ±2.0 % S-L2980A34MC-TF-x 3.5 V ±2.0 % S-L2980A35MC-TF-x 3.6 V ±2.0 % S-L2980A36MC-TF-x 3.7 V ±2.0 % S-L2980A37MC-TF-x 3.8 V ±2.0 % S-L2980A38MC-TF-x 3.9 V ±2.0 % S-L2980A39MC-TF-x 4.0 V ±2.0 % S-L2980A40MC-TF-x 4.1 V ±2.0 % S-L2980A41MC-TF-x 4.2 V ±2.0 % S-L2980A42MC-TF-x 4.3 V ±2.0 % S-L2980A43MC-TF-x 4.4 V ±2.0 % S-L2980A44MC-TF-x 4.5 V ±2.0 % S-L2980A45MC-TF-x 4.6 V ±2.0 % S-L2980A46MC-TF-x 4.7 V ±2.0 % S-L2980A47MC-TF-x 4.8 V ±2.0 % S-L2980A48MC-TF-x 4.9 V ±2.0 % S-L2980A49MC-TF-x 5.0 V ±2.0 % S-L2980A50MC-TF-x 5.1 V ±2.0 % S-L2980A51MC-TF-x 5.2 V ±2.0 % S-L2980A52MC-TF-x 5.3 V ±2.0 % S-L2980A53MC-TF-x 5.4 V ±2.0 % S-L2980A54MC-TF-x 5.5 V ±2.0 % S-L2980A55MC-TF-x 5.6 V ±2.0 % S-L2980A56MC-TF-x 5.7 V ±2.0 % S-L2980A57MC-TF-x 5.8 V ±2.0 % S-L2980A58MC-TF-x 5.9 V ±2.0 % S-L2980A59MC-TF-x 6.0 V ±2.0 % S-L2980A60MC-TF-x Remark 1. Please contact our sales office for type B products. 2. x: G or U 3. Please select products of environmental code = U for Sn 100%, halogen-free products.

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 5 „ Pin Configuration Table 2 Pin No. Symbol Pin 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 or VSS. Figure 2 „ Absolute Maximum Ratings Table 3 (Ta=25 °C unless otherwise specified) Item Symbol Absolute Maximum Rating Unit Input voltage VIN V SS–0.3 to VSS+12 V V ON/OFF V SS–0.3 to VSS+12 V Output voltage VOUT V SS–0.3 to VIN+0.3 V 300 (When not mounted on board) mW Power dissipation PD 600*1 mW Operation ambient temperature T opr –40 to +85 °C Storage temperature Tstg –40 to +125 °C *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 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 50 100 150 600 400 Power Dissipation (PD) [mW] Ambient Temperature (Ta) [°C] 200 100 300 500 700 Figure 3 Power Dissipation of Package (When Mounted on Board)

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 6 „ Electrical Characteristics Table 4 (Ta=25 °C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test circuit Output voltage*1 V OUT(E) V IN =VOUT(S)+1.0 V, IOUT=50 mA VOUT(S) × 0.98 VOUT(S) VOUT(S) × 1.02 V 1 Output current*2 I OUT V IN ≥VOUT(S)+1.0 V 150*5 ⎯ ⎯ mA 3 Dropout voltage*3 V drop I OUT = 50 mA 1.5 V ≤VOUT(S) ≤1.7 V ⎯ 0.17 0.33 V 1 1.8 V ≤VOUT(S) ≤1.9 V ⎯ 0.16 0.29 V 1 2.0 V ≤VOUT(S) ≤2.4 V ⎯ 0.15 0.26 V 1 2.5 V ≤VOUT(S) ≤2.9 V ⎯ 0.13 0.20 V 1 3.0 V ≤VOUT(S) ≤3.2 V ⎯ 0.12 0.15 V 1 3.3 V ≤VOUT(S) ≤6.0 V ⎯ 0.11 0.14 V 1 Line regulation OUT IN

1 OUT

V VΔ VΔ

• VOUT(S)+0.5 V ≤VIN ≤10 V, IOUT=50 mA ⎯ 0.05 0.2 %/V 1 Load regulation ΔVOUT2 V IN=VOUT(S)+1.0 V, 1.0 mA ≤IOUT ≤80 mA ⎯ 12 40 mV 1 Output voltage temperature coefficient*4 OUT OUT V TaΔ VΔ
• VIN=VOUT(S)+1.0 V, IOUT =50 mA, °C 1 Current consumption during operation I SS1 VIN=VOUT(S)+1.0 V, ON/OFF pin=ON, No load ⎯ 90 140 μA 2 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 Input voltage VIN ⎯ 2.0 ⎯ 10 V ⎯ ON/OFF pin input voltage “H” V SH V IN=VOUT(S)+1.0 V, RL=1.0 kΩ 1.5 ⎯ ⎯ V 4 ON/OFF pin input voltage “L” V SL V IN=VOUT(S)+1.0 V, RL=1.0 kΩ ⎯ ⎯ 0.3 V 4 ON/OFF pin input current “H” I SH V IN=VOUT(S)+1.0 V, VON/OFF=7.0 V –0.1 ⎯ 0.1 μA 4 ON/OFF pin input current “L” I SL V IN=VOUT(S)+1.0 V, VON/OFF=0 V –0.1 ⎯ 0.1 μA 4 Ripple rejection RR 1.5 V ≤VOUT(S) ≤3.3 V ⎯ 70 ⎯ dB 5 3.4 V ≤VOUT(S) ≤5.0 V ⎯ 65 ⎯ dB 5 VIN=VOUT(S)+1.0 V, f = 1.0 kHz, ΔVrip=0.5 V rms, IOUT=50 mA 5.1 V ≤VOUT(S) ≤6.0 V ⎯ 60 ⎯ dB 5 *1. VOUT(S): Set output voltage VOUT(E): Actual output voltage at the fixed load The output voltage when fixing I OUT(=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 ΔTa []mV/°C *1 = VOUT(S) []V *2 × ΔVOUT ΔTa•VOUT []ppm/°C *3 ÷ 1000 *1. Temperature change ratio of the output voltage *2. Set 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.

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 8 „ Standard Circuit VSS VOUT ON/OFF VIN CIN CL INPUT OUTPUT GND Single GND *1. C IN is a capacitor used to stabilize input. *2. A ceramic capacitor of 1.0 μF or more can be used for C L, provided that a ceramic capacitor of 2.2 μF or more can be used for the product wh ose 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): 0.47 μF or more Input series resistance (RIN): 10 Ω or less Output capacitor (CL): 1.0 μF or more*1 Equivalent Series Resistance (ESR) for output capacitor: 10 Ω or less *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. Caution Generally a series regulator may cause oscillation, depending on the selection of external parts. Confirm that no oscillation occurs in the application for which the above capacitors are used.

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 9 „ 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. 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.

• OUTIN OUT1 V ΔV ΔV Regulation Line 4. 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 (ΔV OUT2) 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 (V drop) 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)

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 10 7. Output Voltage Temperature Coefficient ⎝ ΔVOUT ΔTa•VOUT The shaded area in Figure 10 is the range where VOUT varies in operation temperature range when the output voltage temperature coefficient is ±100 ppm/°C. VOUT(E) −40 +25 +0.28 mV/°C VOUT [V] +85 Ta [°C] −0.28 mV/°C Example of S-L2980A28 typ. product *1. V OUT(E) is the value of the output voltage measured at Ta= +25°C. Figure 10 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 AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 12 3. ON/OFF Pin This pin starts and stops the regulator. When the ON/OFF pin is set to OFF 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 V SS 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 product type is “A” and to the VSS pin in case of “B”. Table 5 Product Type ON/OFF Pin Internal Circuit VOUT Pin Voltage Current Consumption A “H”: ON Operate Set value ISS1 A “L”: OFF Stop V SS level ISS2 B “H”: OFF Stop V SS level ISS2 B “L”: ON Operate Set value ISS1 VSS ON/OFF VIN 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 Semi- conductor) 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.

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 13 „ 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): 0.47 μF or more Output capacitor (CL): 1.0 μF or more*1 Equivalent Series Resistance (ESR): 10 Ω or less Input series resistance (RIN): 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.
• 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 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.

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 14 „ Typical Characteristics 1. Output Voltage versus Output Current (When Load Current Increases) S-L2980A15 (Ta=25°C) S-L2980A30 (Ta=25°C) 0.0 0.5 1.0 1.5 2.0 0 100 200 300 400 500 IOUT [mA] VOUT [V] VIN=1.8 V 2.0 V 10 V 3.0 V 2.5 V 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 100 200 300 400 500 IOUT [mA] VOUT [V] VIN=3.3 V 3.5 V 4.0 V 10 V 5.0 V S-L2980A50 (Ta=25°C) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 0 100 200 300 400 500 IOUT [mA] VOUT [V] VIN=5.3 V 5.5 V 7.0 V 6.0 V 10 V Remark In determining output current, attention should be paid to the followings. 1) The minimum output current value and footnote *5 in the Table 4 for the “„ Electrical Characteristics”. 2) The package power dissipation 2. Maximum Output Current versus Input Voltage S-L2980A15 (Short-circuit protection included) S-L2980A30 (Short-circuit protection included) 100 200 300 400 500 0 2 4 6 8 10 VIN [V] IOUT max. [mA] Ta=–40°C 25°C 85°C 100 200 300 400 500 2 4 6 8 10 VIN [V] IOUT max. [mA] Ta=–40°C 25°C 85°C S-L2980A50 (Short circuit protection included) 100 200 300 400 500 4 6 8 10 VIN [V] IOUT max. [mA] Ta=–40°C 25°C 85°C Remark In determining output current, attention should be paid to the followings. 1) The minimum output current value and footnote *5 in the Table 4 for the “„ Electrical Characteristics”. 2) The package power dissipation

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 15 3. Output Voltage versus Input Voltage S-L2980A15 (Ta=25°C) S-L2980A30 (Ta=25°C) 1.40 1.45 1.50 1.55 1.60 VIN [V] VOUT [V] IOUT=1.0 mA 30 mA 50 mA 100 mA 2.95 3.00 3.05 3.10 3.15 VIN [V] VOUT [V] 2.85 2.90 IOUT=1.0 mA 30 mA 50 mA 100 mA S-L2980A50 (Ta=25°C) 4.80 4.90 5.00 5.10 5.20 VIN [V] VOUT [V] IOUT=1.0 mA 30 mA 50 mA 100 mA 4. Dropout Voltage versus Output Voltage S-L2980A15 S-L2980A30 100 200 300 400 500 600 0 50 100 150 IOUT [mA] Vdrop [mV] Ta=–40°C 25°C 85°C 100 150 200 250 300 350 400 0 50 100 150 IOUT [mA] Vdrop [mV] Ta=–40°C 25°C 85°C S-L2980A50 100 150 200 250 300 350 0 50 100 150 IOUT [mA] Vdrop [mV] Ta=–40°C 25°C 85°C

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 16 5. Output Voltage versus Ambient Temperature S-L2980A15 S-L2980A30 1.47 1.48 1.49 1.50 1.51 1.52 1.53 –50 0 50 100 Ta [°C] VOUT [V] 2.94 2.96 2.98 3.00 3.02 3.04 3.06 –50 0 50 100 Ta [°C] VOUT [V] S-L2980A50 4.90 4.95 5.00 5.05 5.10 –50 0 50 100 Ta [°C] VOUT [V] 6. Line Regulation versus Ambient Temperature 7. Load Regulation versus Ambient Temperature S-L2980Axx S-L2980Axx –50 0 50 100 Ta [°C] ΔVOUT1 [mV] S-L2980A15 CIN=4.7 μF, CL=10 μF S-L2980A30 S-L2980A50 –50 0 50 100 Ta [°C] ΔVOUT2 [mV] S-L2980A15 CIN=4.7 μF, CL=10 μF S-L2980A30 S-L2980A50

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 17 8. Threshold Voltage of ON/OFF Pin versus Input Voltage S-L2980A15 RL=100 Ω, CIN=4.7 μF, CL=10 μF VSH / VSL [V] VIN [V] 0.0 1.5 1.0 0.5 8642 Ta = −40°C85°C 25°C Ta = −40°C25°C85°C 9. Current Consumption versus Input Voltage S-L2980A15 S-L2980A30 100 0 2 4 6 8 10 VIN [V] ISS1 [μA] 25°C 85°C Ta=–40°C 100 0 2 4 6 8 10 VIN [V] ISS1 [μA] 25°C 85°C Ta=–40°C S-L2980A50 100 0 2 4 6 8 10 VIN [V] ISS1 [μA] 25°C 85°C Ta=–40°C 10. Ripple Rejection S-L2980A30 (Ta=25°C) S-L2980A50 (Ta=25°C) 100 Frequency [Hz] Ripple Rejection [dB] VIN=4.0 V, C L=2.2 μF 10 100 1 k 10 k 100 k 1 M 50 mA IOUT=1 mA 100 Frequency [Hz] Ripple Rejection [dB] VIN=6.0 V, C L=2.2 μF 10 100 1 k 10 k 100 k 1 M 50 mA IOUT=1 mA

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR S-L2980 Series Rev.5.1_00 Seiko Instruments Inc. 18 „ Reference Data 1. Transient Response Characteristics (S-L2980A30MC, Typical data, Ta=25°C) Overshoot Input voltage or Load current Output voltage Undershoot 1-1. Power Source Fluctuation Overshoot Undershoot TIME (20 μs / div.) VOUT[V] VIN CL=2.2 μF VIN, VON/OFF=4.0 →5.0 V, IOUT=1.0 mA 5.0 4.0 3.10 3.05 3.0 VIN VOUT VIN[V] TIME (20 μs / div.) VOUT[V] VIN CL=2.2 μF 5.0 4.0 3.10 3.05 3.0 VIN, VON/OFF=5.0→4.0 V, IOUT=1.0 mA VOUT VIN[V] Overshoot Undershoot TIME (20 μs / div.) VOUT[V] VIN CL=2.2 μF 5.0 4.0 3.10 3.05 3.0 VIN, VON/OFF=4.0→5.0 V, IOUT=50 mA VIN[V] VOUT TIME (20 μs / div.) VOUT[V] VIN CL=2.2 μF VIN, VON/OFF=5.0→4.0 V, IOUT=50 mA 5.0 4.0 3.10 3.05 3.0 VOUT VIN[V]

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR Rev.5.1_00 S-L2980 Series Seiko Instruments Inc. 19 1-2. Load Fluctuation Overshoot Undershoot TIME (20 μs / div.) VOUT[V] IOUT CL=2.2 μF VIN, VON/OFF=4.0 V, IOUT=50 mA→1.0 mA 1.0 3.10 3.05 3.0 IOUT[mA] VOUT TIME (20 μs / div.) 3.10 3.05 3.0 VOUT[V] IOUT CL=2.2 μF VIN, VON/OFF=4.0 V, IOUT=1.0 mA→50 mA 1.0 VOUT IOUT[mA] 1-3. ON/OFF Switching (S-L2980A50MC, Typical data, Ta=25°C) Overshoot Undershoot TIME (20 μs / div.) VON/OFF / VOUT [V] VON/OFF VIN=6.0 V, RL=5.0 kΩ, CL=2.2 μF VOUT TIME (20 μs / div.) VON/OFF / VOUT [V] VON/OFF VIN=6.0 V, RL=5.0 kΩ, CL=2.2 μF VOUT

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