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参数资料
| 型号： | ST2L05R2818PS |
| 厂商： | 意法半导体 |
| 英文描述： | VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| 中文描述： | 极低的静态电流双电压调节器 |
| 文件页数： | 5/24页 |
| 文件大小： | 635K |
| 代理商： | ST2L05R2818PS |
ST2L05
13/24
change a lot depending on the ambient temperature.The test results of the ST2L05 stability using
multilayer ceramic capacitors show that a minimum value of 2.2F is needed for both regulators. This
value can be increased without limit if the input capacitor value is major or equal to 4.7F, and up to 10F
if the input capacitor is minor than 4.7F.Surface-mountable solid tantalum capacitors offer a good
combination of small physical size for the capacitance value and ESR in the range needed by the ST2L05.
The test results show good stability for both outputs with values of at least 1F. The value can be
increased without limit for even better performance such as transient response and noise.
IMPORTANT:
The output capacitor must maintain its ESR in the stable region over the full operating temperature to
assure stability. More over, capacitor tolerance and variations due to temperature must be considered to
assure that the minimum amount of capacitance is provided at all times. For this reason, when a Ceramic
multilayer capacitor is used, the better choice for temperature coefficient is the X7R type, which holds the
capacitance within ±15%. The output capacitor should be located not more than 0.5" from the output pins
of the device and returned to a clean analog ground.
ADJUSTABLE REGULATOR
The ST2L05 has a 1.25V reference voltage between the output and the adjust pins (respectively pin 4 and
2). When a resistor R1 is placed between these two terminals, a constant current flows through R1 and
down to R2 to set the overall (VO2 to GND) output voltage. Minimum load current is 2mA max in all
temperature conditions.
APPLICATION CIRCUIT
VO =VREF(1+R1/R2)+IADJR1
IADJ is very small (typically 35A) and constant: in the VO calculation it can be ignored.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ST2L05R2818PT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| ST2L05R2825K5 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| ST2L05R2825PS | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| ST2L05R2825PT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
| ST2L05R2828K5 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR |
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