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Rev.2.3_00
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series
The S-1131 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 built-in overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor. An ON/OFF circuit ensures a long battery life, and small SOT-89-3, SOT-89-5 and 6-Pin HSON(A) packages realize high-density mounting.
Features
* Output voltage: * High-accuracy output voltage: * Low dropout voltage: * Low current consumption: * High peak current capability: * Built-in ON/OFF circuit: * High ripple rejection: * Built-in overcurrent protector: * Small package: 1.5 V to 5.5 V, selectable in 0.1 V steps. 1.0% 250 mV typ. (3.0 V output product, IOUT = 100 mA) During operation: 35 A typ., 65 A max. During shutdown: 0.1 A typ., 1.0 A max. *1 300 mA output is possible (@ VIN VOUT(S) + 1.0 V) Ensures long battery life. 70 dB typ. (@ 1.0 kHz) Overcurrent of output transistor can be restricted. SOT-89-3, SOT-89-5, 6-Pin HSON(A)
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
* Power supply for DVD and CD-ROM drives * Power supply for battery-powered devices * Power supply for personal communication devices * Power supply for note PCs
Packages
* SOT-89-3 * SOT-89-5 * 6-Pin HSON(A) (Package drawing code: UP003-A) (Package drawing code: UP005-A) (Package drawing code: PD006-A)
Seiko Instruments Inc.
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Block Diagram
(1) Without shutdown function (Package : SOT-89-3)
*1
VIN Overcurrent protector
VOUT
+ - Reference voltage circuit
VSS
*1. Parasitic diode
Figure 1 (2) With shutdown function (Package : SOT-89-5, 6-Pin HSON(A))
*1
VIN Overcurrent protector
VOUT
ON/OFF
ON/OFF circuit
+ -
Reference voltage circuit
VSS
*1. Parasitic diode
Figure 2
2
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Product Code Structure
* The product types and output voltage for the S-1131 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-1131 x xx xx - xxx - TF IC direction in tape specifications Product name (abbreviation)
*2 *1
Package name (abbreviation) UA: SOT-89-3 UC: SOT-89-5 PD: 6-Pin HSON(A) Output voltage 15 to 55 (E.g., when the output voltage is 1.5 V, it is expressed as 15.) Product type 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) under the Operation (Expect SOT-89-3). 2. Product name list Table 1 SOT-89-5 6-Pin HSON(A) Output Voltage 1.5 V 1.0% S-1131B15UC-N4A-TF S-1131B15PD-N4A-TF 1.8 V 1.0% S-1131B18UC-N4D-TF S-1131B18PD-N4D-TF 2.5 V 1.0% S-1131B25UA-N4K-TF S-1131B25UC-N4K-TF S-1131B25PD-N4K-TF 2.7 V 1.0% S-1131B27UC-N4M-TF S-1131B27PD-N4M-TF 3.0 V 1.0% S-1131B30UA-N4P-TF S-1131B30UC-N4P-TF S-1131B30PD-N4P-TF 3.3 V 1.0% S-1131B33UA-N4S-TF S-1131B33UC-N4S-TF S-1131B33PD-N4S-TF 5.0 V 1.0% S-1131B50UA-N5J-TF S-1131B50UC-N5J-TF S-1131B50PD-N5J-TF Remark Please contact the SII marketing department for products with an output voltage other than those specified above or type A products. SOT-89-3 S-1131B15UA-N4A-TF
*3
Seiko Instruments Inc.
3
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Pin Configuration
SOT-89-3 Top view
Table 2 Pin No. 1 2 3 Symbol VOUT VSS VIN Description Output voltage pin GND pin Input voltage pin
1
2
Figure 3
3
SOT-89-5 Top view 5 4
Table 3 Pin No. 1 2 3 4 5 Symbol VOUT VSS *1 NC ON/OFF VIN Description Output voltage pin GND pin No connection Shutdown pin Input voltage pin
*1. The NC pin is electrically open. The NC pin can be connected to VIN or VSS. 1 2 Figure 4 3
6-Pin HSON(A) Top view 6 5 4
Table 4 Pin No. 1 2 3 4 5 6 Symbol VOUT VSS *1 NC *1 NC ON/OFF VIN Description Output voltage pin GND pin No connection No connection Shutdown pin Input voltage pin
1
2
3
*1. The NC pin is electrically open. The NC pin can be connected to VIN or VSS.
Figure 5
4
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Absolute Maximum Ratings
Table 5 Item Input voltage Output voltage Power dissipation Symbol VIN VON/OFF VOUT PD (Ta = 25C unless otherwise specified) Absolute Maximum Rating Unit V VSS - 0.3 to VSS + 7 VSS - 0.3 to VIN + 0.3 VSS - 0.3 to VIN + 0.3 SOT-89-3 500 mW SOT-89-5 500 6-Pin HSON(A) 500 -40 to +85 C -40 to +125
Operating ambient temperature Storage ambient temperature
Topr Tstg
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.
Seiko Instruments Inc.
5
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Electrical Characteristics
Table 6 (Ta = 25C unless otherwise specified)
Item Output voltage
*1
Symbol VOUT(E)1 VOUT(E)2
Conditions VIN = VOUT(S) + 1.0 V, IOUT = 30 mA VIN = VOUT(S) + 1.0 V, IOUT = 80 mA VIN VOUT(S) + 1.0 V IOUT = 100 mA VOUT(S) = 1.5 V VOUT(S) = 1.6 V VOUT(S) = 1.7 V VOUT(S) = 1.8 V VOUT(S) = 1.9 V VOUT(S) = 2.0 V VOUT(S) = 2.1 V 2.2 V VOUT(S) 2.5 V 2.6 V VOUT(S) 3.3 V 3.4 V VOUT(S) 5.5 V VOUT(S) + 0.5 V VIN 6.5 V, IOUT = 80 mA VIN = VOUT(S) + 1.0 V, 1.0 mA IOUT 80 mA VIN = VOUT(S) + 1.0 V, IOUT = 10 mA, -40C Ta 85C VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, no load VIN = VOUT(S) + 1.0 V, f = 1.0 kHz, Vrip = 0.5 Vrms, IOUT = 80 mA VIN = VOUT(S) + 1.0 V, ON/OFF pin = ON, VOUT = 0 V VIN = VOUT(S) + 1.0 V, ON/OFF pin = OFF, no load VIN = VOUT(S) + 1.0 V, RL = 1.0 k VIN = VOUT(S) + 1.0 V, RL = 1.0 k VIN = 6.5 V, VON/OFF = 6.5 V VIN = 6.5 V, VON/OFF = 0 V
Min. VOUT(S) x 0.99 VOUT(S) x 0.98 *5 300 2.0 1.5 -0.1 -0.1
Typ. VOUT(S) VOUT(S) 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.25 0.20 0.05 20 100 35 70 450 0.1
Max. VOUT(S) x 1.01 VOUT(S) x 1.02 1.05 0.95 0.85 0.75 0.65 0.60 0.55 0.49 0.34 0.28 0.2 40 65 6.5 1.0 0.3 0.1 0.1
Unit V
Test Circuit 1
Output current *3 Dropout voltage
*2
IOUT Vdrop
mA V
3 1
Line regulation Load regulation
VOUT1 VIN * VOUT
VOUT2
%/V mV ppm / C A V dB mA 2 5 3
Output voltage VOUT *4 temperature coefficient Ta * VOUT Current consumption ISS1 during operation Input voltage VIN Ripple rejection Short-circuit current Current consumption during shutdown Shutdown pin input voltage "H" Shutdown pin input voltage "L" Shutdown pin input current "H" Shutdown pin input current "L" RR Ishort ISS2 VSH VSL ISH ISL
4
A
*1. VOUT(S): Specified output voltage VOUT(E)1: Actual output voltage at the fixed load The output voltage when fixing IOUT(= 30 mA) and inputting VOUT(S) + 1.0 V VOUT(E)2: Actual output voltage at the fixed load The output voltage when fixing IOUT(= 80 mA) and inputting VOUT(S) + 1.0 V *2. The output current at which the output voltage becomes 95% of VOUT(E)1 after gradually increasing the output current. *3. Vdrop = VIN1 - (VOUT3 x 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 x 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.
6
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Test Circuits
1.
VIN ON/OFF
Set to power on
*1
VOUT VSS V +
+
A
Figure 6 2.
A VIN ON/OFF
Set to VIN or GND
*1
VOUT VSS
Figure 7 3.
+ VIN ON/OFF
Set to power on
*1
VOUT VSS
A V +
Figure 8 4.
A + VIN ON/OFF*1 VOUT + VSS V RL
Figure 9 5.
VIN ON/OFF
Set to power on
VOUT
*1
+
VSS
V
RL
Figure 10 *1. In case of product with shutdown function.
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7
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Standard Circuit
Input VIN CIN
*1
Output VOUT
*2 *3
ON/OFF VSS
CL
Single GND
GND
*1. CIN is a capacitor for stabilizing the input. *2. In case of product with shutdown function. *3. A tantalum capacitor (2.2 F or more) can be used. Figure 11 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): 1.0 F or more 2.2 F or more (tantalum capacitor)
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.
8
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 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. Output voltage (VOUT) The accuracy of the output voltage is ensured at 1.0% under the specified conditions of fixed input *1 voltage , 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. 3. Line regulation
VOUT1 VIN * VOUT
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. 4. 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. 5. 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 x 0.98). Vdrop = VIN1 - (VOUT3 x 0.98)
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9
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series
VOUT 6. Temperatur e coefficient of output voltage Ta * VOUT The shadowed area in Figure 12 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-1131B28 Typ. VOUT [V]
+0.28 mV / C
VOUT(E)1
*1
-0.28 mV / C
-40
25
85
Ta [C]
*1. VOUT(E)1 is the value of the output voltage measured at 25C.
Figure 12 A change in the temperature of the output voltage [mV/C] is calculated using the following equation. *1. Change in temperature of output voltage *2. Specified output voltage *3. Output voltage temperature coefficient
VOUT [mV/C]*1 = VOUT(S)[V ]*2 x VOUT [ppm/C]*3 / 1000 Ta Ta * VOUT
10
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Operation
1. Basic operation Figure 13 shows the block diagram of the S-1131 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 13 2. Output transistor The S-1131 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.
Seiko Instruments Inc.
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series
3. Shutdown pin (ON/OFF pin) The products with shutdown function performs starting and a stop 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 hundreds k between the VOUT pin and VSS pin. The structure of the ON/OFF pin is as shown in Figure 14. Since the ON/OFF pin is neither pulled down nor pulled up internally, do not use it in the floating 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 7 Logic Type A A B B ON/OFF Pin "L": Power on "H": Power off "L": Power off "H": Power on Internal Circuits Operating Stopped Stopped Operating VOUT Pin Voltage Set value VSS level VSS level Set value Current Consumption ISS1 ISS2 ISS2 ISS1
VIN
ON/OFF
VSS Figure 14
Selection of Output Capacitor (CL)
The S-1131 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 F or more between VOUT and VSS pins. For stable operation of the S-1131 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 to 5 ), 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 to 5 , which varies depending on the usage conditions, so perform sufficient evaluation for selection. Ordinarily, around 1.0 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.
12
Seiko Instruments Inc.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 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). * This IC performs phase compensation by using an internal phase compensator and the ESR of an output capacitor. Therefore, always place a capacitor of 2.2 F or more between VOUT and VSS pins. A tantalum type capacitor is recommended. Moreover, to secure stable operation of the S-1131 Series, it is necessary to employ a capacitor with an ESR within an optimum range (0.5 to 5 ). Using a capacitor whose ESR is outside the optimum range (approximately 0.5 to 5 ), 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 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 6 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.
Seiko Instruments Inc.
13
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Typical Characteristics
(1) Output voltage vs. Output current (when load current increases) S-1131B15 (Ta = 25C)
2.5 2 VOUT [V] 1.5 1 0.5 0 0 200 400 IOUT [mA] 600 800 VIN = 1.8 V 2.5 V 2.0 V 6.5 V VOUT [V]
S-1131B30 (Ta = 25C)
4 3.5 3 2.5 2 1.5 1 0.5 0 0 3.5 V 4.0 V
VIN = 3.3 V 6.5 V
200
400 IOUT [mA]
600
800
S-1131B50 (Ta = 25C)
6 5 4 VOUT [V] 3 2 1 0 0 200 400 IOUT [mA] 600 800 VIN = 5.3 V 5.5 V 6.0 V 6.5 V
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
(2) Output voltage vs. Input voltage S-1131B15 (Ta = 25C)
1.6 1.55 VOUT [V] 1.5 1.45 1.4 1 1.5 2 VIN [V] 2.5 3 3.5 80 mA VOUT [V] 30 mA 50 mA IOUT = 1 mA
S-1131B30 (Ta = 25C)
3.05 3 2.95 2.9 2.85 2.8 2.5 3 3.5 VIN [V] 4 4.5 5 30 mA 80 mA 50 mA IOUT = 1 mA
S-1131B50 (Ta = 25C)
5.1 5.08 5.06 5.04 5.02 5 4.98 4.96 4.94 4.92 4.9
VOUT [V]
30 mA
IOUT = 1 mA
50 mA 80 mA 5 5.5 VIN [V] 6 6.5 7
4.5
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series
(3) Dropout voltage vs. Output current S-1131B15
1.0 0.8 Vdrop [V] 0.6 0.4 0.2 0 0 50 100 150 200 250 300 350 -40C 85C 25C
S-1131B30
1.0 0.8 Vdrop [V] 0.6 0.4 0.2 0 0 50 100 150 200 250 85C 25C -40C 300 350
IOUT [mA]
IOUT [mA]
S-1131B50
1.0 0.8 Vdrop [V] 0.6 0.4 0.2 0 0 50 100 150 200 85C 25C -40C 250 300 350
IOUT [mA]
(4) Dropout voltage vs. Set output voltage
0.4 0.35 150 mA 0.3 100 mA 0.25 0.2 0.15 50 mA 0.1 30 mA 0.05 10 mA 0 0 1
Vdrop [V]
2
3
VOTA [V]
4
5
6
7
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series
(5) Output voltage vs. Ambient temperature S-1131B15
1.6 1.55
S-1131B30
3.1 3.05
VOUT [V]
VOUT [V]
1.5 1.45 1.4 -40 -20 0 20 40 60 80 100
3 2.95 2.9 -40
-20
0
20
40
60
80
100
Ta [C]
Ta [C]
S-1131B50
5.1 5.08 5.06 5.04 5.02 5 4.98 4.96 4.94 4.92 4.9 -40
VOUT [V]
-20
0
20
40
60
80
100
Ta [C]
(6) Current consumption vs. Input voltage S-1131B15
45 40 35 30 25 20 15 10 5 0 0 25C
S-1131B30
45 40 35 30 25 20 15 10 5 0 0
25C -40C 85C
ISS1 [A]
85C
ISS1 [A]
-40C
2
4 VIN [V]
6
8
2
4 VIN [V]
6
8
S-1131B50
45 40 35 30 25 20 15 10 5 0 0
85C 25C
ISS1 [A]
-40C
2
4 VIN [V]
6
8
16
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HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series
(7) Ripple rejection S-1131B15 (Ta = 25C)
VIN = 2.5 V, COUT = 2.2 F 100 Ripple Rejection [dB] Ripple Rejection [dB] 80 60 40 20 0 10 100 1k 10 k Frequency [Hz] 80 mA 100 k 1M 30 mA IOUT = 1 mA
S-1131B30 (Ta = 25C)
VIN = 4.0 V, COUT = 2.2 F 100 80 60 40 30 mA 20 0 10 100 1k 10 k 80 mA 100 k 1M IOUT = 1 mA
Frequency [Hz]
S-1131B50 (Ta = 25C)
VIN = 6.0 V, COUT = 2.2 F
100
Ripple Rejection [dB]
80 60 40
IOUT = 1 mA
30 mA 20 0 10 100 1k 10 k 80 mA 100 k 1M
Frequency [Hz]
Seiko Instruments Inc.
17
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Rev.2.3_00 S-1131 Series Reference Data
(1) Input transient response characteristics
IOUT = 80 mA, tr = tf = 5.0 s, COUT = 2.2 F, CIN = 0 F
3.02 3.015 3.01 6 5 4
IOUT = 80 mA, tr = tf = 5.0 s, COUT = 4.7 F, CIN = 0 F
3.02 3.015 3.01 6 5 4 3
VOUT [V]
VIN [V]
3.005 3 2.995 2.99 -20 0 20 40 60
3
3.005 3 2.995 2.99 -20 0 20 40 60
VOUT
2 1 0
V OUT
2 1 0
80
100 120 140 160 180
80
100 120 140 160 180
t [s]
t [s]
(2) Load transient response characteristics
VIN = 4.0 V, COUT = 2.2 F, CIN = 1.0 F, IOUT = 50100 mA
3.2 3.15 3.1 150 100 50
VIN = 4.0 V, COUT = 4.7 F, CIN = 1.0 F, IOUT = 50100 mA
3.2 3.15 3.1 150 100 50
IOUT [mA]
VOUT [V]
3.05 3 2.95 2.9 -2 0 2 4 6 8 10 12
IOUT V OUT
14 16
VOUT [V]
0 -50 -100 -150 18
3.05 3 2.95 2.9 -2 0 2 4 6 8 10 12
IOUT V OUT
14 16
0 -50 -100 -150 18
t [s]
t [s]
(3) Shutdown pin transient response characteristics S-1131B15 (Ta = 25C) S-1131B30 (Ta = 25C)
VIN = 2.5 V, COUT = 2.2 F, CIN = 1.0 F
2.5 2 1.5 3 5 4
VIN = 4.0 V, COUT = 2.2 F, CIN = 1.0 F
6 4
VON/OFF VOUT
2
VON/OFF [V]
1 0.5 0 -0.5 -10 0 10 20 30 40 50 60 70
0 -1 -2 -3
2 1 0 -1 -10 0 10 20 30 40 50
V OUT
V ON/OFF
0 -2 -4 -6
80
90
60
70
80
90
t [s]
t [s]
S-1131B50 (Ta = 25C)
7 6 5
VIN = 6.0 V, COUT = 2.2 F, CIN = 1.0 F
8 6
3 2 1 0 -1 -10 0 10 20 30 40 50
V OUT
0 -2 -4 -6 -8
60
70
80
90
t [s]
18
Seiko Instruments Inc.
VON/OFF [V]
VOUT [V]
4
V ON/OFF
4 2
VON/OFF [V]
1
3
2
VOUT [V]
VOUT [V]
IOUT [mA]
VIN [V]
VIN
VOUT [V]
V IN
4.50.1 1.60.2
1.50.1
1
2
3
1.50.1 1.50.1
0.40.05
45
0.40.1 0.450.1
0.40.1
No. UP003-A-P-SD-1.1
TITLE No. SCALE UNIT
SOT893-A-PKG Dimensions UP003-A-P-SD-1.1
mm
Seiko Instruments Inc.
o1.5 -0
+0.1
4.00.1(10 pitches : 40.00.2)
2.00.05
o1.5 +0.1 -0 5 max. 8.00.1 0.30.05 2.00.1
4.750.1
Feed direction
No. UP003-A-C-SD-1.1
TITLE No. SCALE UNIT
SOT893-A-Carrier Tape UP003-A-C-SD-1.1
mm
Seiko Instruments Inc.
16.5max.
Enlarged drawing in the central part
13.00.3
(60)
(60)
No. UP003-A-R-SD-1.1
TITLE No. SCALE UNIT mm
SOT893-A-Reel UP003-A-R-SD-1.1
QTY. 1,000
Seiko Instruments Inc.
4.50.1 1.60.2
5 4
1.50.1
1
2
3
1.50.1 1.50.1
0.40.05
0.3 0.40.1 0.450.1 0.40.1
45
No. UP005-A-P-SD-1.1
TITLE No. SCALE UNIT
SOT895-A-PKG Dimensions UP005-A-P-SD-1.1
mm
Seiko Instruments Inc.
o1.5 +0.1 -0 2.00.05
4.00.1(10 pitches : 40.00.2)
5 max.
o1.5 +0.1 -0
8.00.1
0.30.05 2.00.1
4.750.1
321
4
5
Feed direction
No. UP005-A-C-SD-1.1
TITLE No. SCALE UNIT
SOT895-A-Carrier Tape UP005-A-C-SD-1.1
mm
Seiko Instruments Inc.
16.5max.
13.00.3 Enlarged drawing in the central part
(60)
(60)
No. UP005-A-R-SD-1.1
TITLE No. SCALE UNIT mm
SOT895-A-Reel UP005-A-R-SD-1.1
QTY. 1,000
Seiko Instruments Inc.
2.900.1 0.5typ.
0.950.05
0.30 -0.05
+0.1
(1.5)
No.
PD006-A-P-SD-2.0
HSON6A-A-PKG Dimensions
PD006-A-P-SD-2.0 mm
Seiko Instruments Inc.
4.00.1
2.00.05
1.50.1 o1.550.05
0.20.05 3.30.1 4.00.1 o1.050.05
3
1
4
6
Feed direction
No.
P D 0 0 6 - A - C - S D - 2 .0
HSON6A-A-Carrier Tape
PD006-A-C-SD-2.0 mm
Seiko Instruments Inc.
12.5max.
Enlarged drawing in the central part o130.2
9.00.3
(60)
(60)
No.
PD006-A-R-SD-1.0
HSON6A-A-Reel
PD006-A-R-SD-1.0 3000 mm
Seiko Instruments Inc.
* * * * * *
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. 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.

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