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参数资料
| 型号： | S-817B50AUA-CXNT2U |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.25 V DROPOUT, PSSO3 |
| 封装： | HALOGEN AND LEAD FREE, SOT-89, 3 PIN |
| 文件页数： | 10/53页 |
| 文件大小： | 826K |
| 代理商： | S-817B50AUA-CXNT2U |
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SUPER-SMALL PACKAGE CMOS VOLTAGE REGULATOR
S-817 Series
Rev.5.0_00
Seiko Instruments Inc.
18
The S-817 Series can be configured as a constant current circuit. Refer to Figure 16 and 17.
Constant amperage (IO) is calculated using the following equation (VOUT(E): Effective output voltage):
IO = (VOUT(E) ÷ RL) +ISS.
Note that by using a circuit in Figure16, it is impossible to set the better driving ability to the constant
amperage (IO) than the S-817 Series basically has.
To gain the driving ability which exceeds the S-817 Series, there’s a way to combine a constant current
circuit and a current boosting circuit, as seen in Figure 17.
The maximum input voltage for a constant current circuit is 10 V + the voltage for device (VO).
It is not recommended to add a capacitor between the VIN (power supply) and VSS pin or the VOUT
(output) and VSS pin because the rush current flows at power-on.
The following is a characteristics example of input voltage between VIN and VO vs. IO current (Typ. Ta
= 25
°C) in constant current boosting circuit in Figure 17.
VIN, VO pins, Input voltage - IO current
S-817A11ANB, S-817B11AMC, Tr : 2SK1213Y, R1 : 1 kΩ, VO=2 V
0.00
0.10
0.20
0.30
0.40
0.50
0.60
1.4
1.6
1.8
2
2.2
2.4
VINVO(V)
IO
(A
)
RL=1.83 Ω
2.2
Ω
2.75
Ω
3.67
Ω
5.5
Ω
11
Ω
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S-817B50AY-B | 功能描述:低压差稳压器 - LDO 5.0V 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-817B50AY-B2-U | 功能描述:低压差稳压器 - LDO 5.0V 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-817B50AY-B-G | 制造商:Seiko Instruments Inc (SII) 功能描述:IC REG LDO 5V 0.075A TO92-3 |
| S-817B50AY-T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| S-817B50AY-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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