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| 型号： | S-817B20AMC-CWJT2U |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 2 V FIXED POSITIVE LDO REGULATOR, 0.67 V DROPOUT, PDSO5 |
| 封装： | HALOGEN AND LEAD FREE, SOT-23, 5 PIN |
| 文件页数： | 11/53页 |
| 文件大小： | 826K |
| 代理商： | S-817B20AMC-CWJT2U |
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SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR
Rev.5.0_00
S-817 Series
Seiko Instruments Inc.
19
3. Output Voltage Adjustment Circuit (Only for S-817B Series (Product without short circuit
protection))
GND
V0
R2
R1
VOUT
VIN
VIN
CL
C1
CIN
VSS
S-817
Series
Figure 18
The output voltage can be boosted by using the configuration shown in Figure 18. The output Voltage
(VO) can be calculated using the following equation (VOUT(E):Effective output voltage):
VO = VOUT(E) × (R1 + R2) ÷ R1 + R2 × ISS
Set the values of resistors R1 and R2 so that the S-817 Series is not 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
18, 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 (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 μA 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 (CL) :
0.1
μF or more
Equivalent Series Resistance (ESR) :
30
Ω or less
Input series resistance (RIN) :
10
Ω 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.
相关PDF资料 |
PDF描述 |
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| S-817B20AUA-CWJT2U | 2 V FIXED POSITIVE LDO REGULATOR, 0.67 V DROPOUT, PSSO3 |
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| S-817B38AUA-CXBT2U | 3.8 V FIXED POSITIVE LDO REGULATOR, 0.35 V DROPOUT, PSSO3 |
| S-817B42AMC-CXFT2U | 4.2 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO5 |
| S-817B42AUA-CXFT2U | 4.2 V FIXED POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PSSO3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| S-817B20AUA-CWJ-T2 | 功能描述:低压差稳压器 - LDO 2.0V 1.2uA 2.0% RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-817B20AUA-CWJT2G | 功能描述:低压差稳压器 - LDO 2.0V 1.2uA 2.0% RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-817B20AY-B2-U | 功能描述:低压差稳压器 - LDO Linear LDO regulator 1.2uA Iq 75mA Iout RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| S-817B20AY-B-G | 制造商:Seiko Instruments Inc (SII) 功能描述:IC REG LDO 2V 35MA TO92-3 |
| S-817B20AY-X | 制造商:SII 制造商全称:Seiko Instruments Inc 功能描述:SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR |
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