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参数资料
| 型号： | S-1137D33-I6T2G |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.31 V DROPOUT, PDSO6 |
| 封装： | LEAD FREE, SNT-6 |
| 文件页数： | 7/47页 |
| 文件大小： | 500K |
| 代理商： | S-1137D33-I6T2G |
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HIGH RIPPLE-REJECTION LOW DROPOUT SOFT-START FUNCTION CMOS VOLTAGE REGULATOR
Rev.2.0_01
S-1137 Series
Seiko Instruments Inc.
15
Standard Circuit
CIN
*1
CL
*2
GND
VOUT
VIN
VSS
ON / OFF
SSC
CSS
*3
Input
Output
Single GND
*1.
CIN is a capacitor for stabilizing the input.
*2.
Ceramic capacitor of 1.0
μF or more can be used as C
L.
*3.
A ceramic capacitor of 0.22 nF to 22 nF can be used for CSS.
Figure 14
Caution
The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Condition of Application
Input capacitor (CIN) :
1.0
μF or more
Output capacitor (CL) :
1.0
μF or more (Ceramic capacitor)
Capacitor for soft-start (CSS) : 0.22 nF to 22 nF (Ceramic capacitor)
Caution A general series regulator may oscillate, depending on the external components. Confirm that no
oscillation occurs in the application for which the above capacitors are used.
Selection of Input and Output Capacitors (CIN, CL)
The S-1137 Series requires an output capacitor between the VOUT and VSS pin for phase compensation. Operation is
stabilized by a ceramic capacitor with an output capacitance of 1.0
μF or more over the entire temperature range.
When using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, the capacitance must be 1.0
μF or
more.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on the application.
The recommended capacitance for an application is CIN ≥ 1.0 μF, CL ≥ 1.0 μF; however, when selecting the output
capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual device.
Selection of Capacitor for Soft-start (CSS)
The S-1137 Series requires a capacitor for soft-start (CSS) between the SSC and VSS pins. In the all range of
temperature, the S-1137 Series operates stably with a ceramic capacitor of 0.22 nF or more. By the value of this CSS,
the rising speed of the output voltage is adjustable. The time that the output voltage rises to 99% is 0.7 ms (typ.), CSS =
1 nF. The recommended value for applications is 0.22 nF
≤ C
SS ≤ 22 nF, however, define the values by sufficient
evaluation including the temperature characteristics under the usage condition.
相关PDF资料 |
PDF描述 |
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| S-1137D33-I6T2U | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.31 V DROPOUT, PDSO6 |
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| S-1137D33-M5T1U | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.31 V DROPOUT, PDSO5 |
| S-1137D33-U5T1G | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.31 V DROPOUT, PDSO5 |
| S-817A27ANB-CUQT2U | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.51 V DROPOUT, PDSO4 |
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