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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： | 11/47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.
19
3.
ON / OFF pin
This pin starts and stops the regulator.
When the ON / OFF pin is set to the power-off level, the entire internal circuit stops operating, and the built-in P-
channel MOS FET output transistor between the VIN and VOUT pins is turned off, reducing current consumption
significantly. The S-1137 has a discharge shunt circuit which discharges the capacitor for soft-start (CSS) so that the
SSC pin is forcibly set to the VSS level.
Since the S-1137 Series A / B types have a built-in discharge shunt circuit to discharge the output capacitance, the
VOUT pin is forcibly set to VSS level. In the S-1137 Series C / D types, the VOUT pin is set to VSS level through several
hundred k
Ω internal divided resistors between the VOUT and VSS pins.
Note that the current consumption increases when a voltage of 0.3 V to 1.0 V (Ta = 25
°C) is applied to the ON / OFF
pin. The ON / OFF pin is configured as shown in Figures 17 and 18. In the S-1137 Series A / C types, the ON / OFF
pin is internally pulled down to VSS in the floating status, so the VOUT pin is set to the VSS level. In the S-1137 Series
B / D types, the ON / OFF pin is not internally pulled down, so do not use these types with the ON / OFF pin in the
floating status. When not using the ON / OFF pin in the S-1137 Series B / D types, connect the pin to the VIN pin.
Table 11
Logic Type
ON / OFF Pin
Internal Circuits
VOUT Pin Voltage
Current Consumption
A / B / C / D
“H”: Power-on
Operate
Set value
ISS1
*1
A / B / C / D
“L”: Power-off
Stop
VSS level
ISS2
*1.
IC’s current consumption increases as much as current flows into the pull-down resistor when the ON / OFF
pin is connected to VIN and the S-1137 Series A / C types is operating (Figure 17).
(1) S-1137 Series A / C Type
(2) S-1137 Series B / D Type
VSS
VIN
ON / OFF
VSS
VIN
ON / OFF
Figure 17
Figure 18
相关PDF资料 |
PDF描述 |
|---|---|
| S-1137D33-I6T2U | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.31 V DROPOUT, PDSO6 |
| S-1137D33-M5T1S | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.31 V DROPOUT, PDSO5 |
| 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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