參數(shù)資料
型號(hào)： S817
廠(chǎng)商： Seiko Instruments Inc.
英文描述： SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR
中文描述： 超小型封裝CMOS電壓穩(wěn)壓器
文件頁(yè)數(shù)： 18/50頁(yè)
文件大?。?/td> 830K
代理商： S817
SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR
S-817 Series
Rev.3.0
_00
Seiko Instruments Inc.
18
3. Output Voltage Adjustment Circuit (Only for S817B Series (Product without short circuit protection))
GND
V0
R
2
R
1
VOUT
VIN
V
IN
C
L
C1
C
IN
VSS
S-817
Series
Figure 17
The output voltage can be boosted by using the configuration shown in
Figure 17
. The output Voltage
(V
O
) can be calculated using the following equation (V
OUT(E)
:Effective output voltage):
V
O
=
V
OUT(E)
×
(R
1
+
R
2
)
÷
R
1
+
R
2
×
I
SS
Set R
1
and R
2
to high values of resistance so as not to be affected by current consumption (I
SS
).
Capacitor C1 is effective in minimizing output fluctuation at powering on or due to power or load
fluctuation. Determine the optimum value on your actual device. But it is not also recommended to
attach a capacitor between the S-817 Series power source VIN and VSS pin or between output VOUT
and VSS pin because output fluctuation or oscillation at powering on might occur. As shown in
Figure
17
, a capacitor must be mounted between VIN and GND, and between VOUT and GND.
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 (C
L
) and a capacitor for stabilizing
the input between VIN and VSS pins (C
IN
), 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
μ
A 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.
Output capacitor (C
L
) :
Equivalent Series Resistance (ESR) : 30
or less
Input series resistance (R
IN
) :
0.1
μ
F or more
10
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.
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.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S-817 制造商:SII 制造商全稱(chēng):Seiko Instruments Inc 功能描述:SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR
S-817_1 制造商:SII 制造商全稱(chēng):Seiko Instruments Inc 功能描述:SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR
S8171AV34 制造商: 功能描述: 制造商:undefined 功能描述:
S-817A11ANB-CUA-T2 功能描述:低壓差穩(wěn)壓器 - LDO 1.1V 1.2uA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
S-817A11ANB-CUAT2G 功能描述:低壓差穩(wěn)壓器 - LDO 1.1V 1.2uA 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)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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