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參數(shù)資料
| 型號： | S-818A25AMC-BGF-T2 |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | LOW DROPOUT CMOS VOLTAGE REGULATOR |
| 中文描述： | 低壓差型CMOS電壓穩(wěn)壓器 |
| 文件頁數(shù)： | 8/23頁 |
| 文件大?。?/td> | 366K |
| 代理商： | S-818A25AMC-BGF-T2 |
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.1.2
8
Seiko Instruments Inc.
Selection of Output Capacitor (CL)
The S-818 series needs an output capacitor between VOUT pin and VSS pin for phase compensation. A small
ceramic or an OS electrolytic capacitor of 2
μ
F or more can be used. If a tantalum or an aluminum electrolytic
capacitor is used, its capacitance must be 2
μ
F or more and the ESR must be 10
or less.
Attention should be paid not to cause an oscillation due to increase of ESR at low temperatures when using an
aluminum electrolytic capacitor.
Evaluate the performance including temperature characteristics before prototyping the circuit.
Overshoot and undershoot characteristics differ depending upon the type of the output capacitor. Refer to output
capacitor dependence data in transient response characteristics .
Design Considerations
Design wiring patterns for VIN, VOUT and GND pins to decrease impedance.
When mounting an output capacitor, connection from the capacitor to the VOUT pin and to the VSS pin
should be as close as possible.
Note that output voltage may increase when the voltage regulator is used at low load current (less than 10
μ
A).
To prevent oscillation, it is recommended to use the external components under the following conditions:
* Input capacitor (C
IN
): 0.47
μ
F or more
* Output capacitor (C
L
): 2
μ
F or more
* Equivalent Series Resistance (ESR): 10
or less
* Input series resistance (R
IN
): 10
or less
The voltage regulator may oscillate when the impedance of the power supply is high and the input
capacitor is small or not connected.
Be sure that input voltage and load current do not exceed the power dissipation level of the package.
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.
In determining necessary output current, consider the value of output current of Table 4 “Electrical
Characteristics” and Note *5) (page 4).
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| S-818A25AMC-BGFT2G | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 30uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| S-818A25AUC-BGF-T2 | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 30uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| S-818A25AUC-BGFT2G | 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 30uA 2.0% RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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| S-818A26AUC-BGGT2G | 功能描述:低壓差穩(wěn)壓器 - LDO Linear LDO Regulator 30uA Iq 300mA Iout RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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