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参数资料
| 型号： | S-1312B17-A4T1U3 |
| 元件分类： | 固定正电压单路输出LDO稳压器 |
| 英文描述： | FIXED POSITIVE LDO REGULATOR, PDSO4 |
| 封装： | HALOGEN FREE AND LEAD FREE, HSNT-4 |
| 文件页数： | 14/41页 |
| 文件大小： | 523K |
| 代理商： | S-1312B17-A4T1U3 |
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LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1312 Series
Seiko Instruments Inc.
21
6. Overcurrent protection circuit
The S-1312 Series has an overcurrent protection circuit having the characteristics shown in “1. Output Voltage vs.
Output Current (When Load Current Increases) (Ta
= +25°C)” in “ Characteristics (Typical Data)”, in order to
protect the output transistor against an excessive output current and short circuiting between the VOUT and VSS pins.
The current (Ishort) when the output pin is short-circuited is internally set at approx. 50 mA typ., and the normal value is
restored for the output voltage, if releasing a short circuit once.
Caution Using the overcurrent protection circuit is to protect the output transistor from accidental conditions
such as short circuited load and the rapid and large current flow in the large capacitor. The
overcurrent protection circuit is not suitable for use under the short circuit status or large current
flowing (180 mA or more) that lasts long.
7. Thermal shutdown circuit
The S-1312 Series has a thermal shutdown circuit to protect the device from damage due to overheat. When the
junction temperature rises to 150
°C typ., the thermal shutdown circuit operates to stop regulating. When the junction
temperature drops to 120
°C typ., the thermal shutdown circuit is released to restart regulating.
Due to self-heating of the S-1312 Series, if the thermal shutdown circuit starts operating, it stops regulating so that the
output voltage drops. When regulation stops, the S-1312 Series does not itself generate heat and the IC’s
temperature drops. When the temperature drops, the thermal shutdown circuit is released to restart regulating, thus
this IC generates heat again. Repeating this procedure makes the waveform of the output voltage into a pulse-like
form. Stop or restart of regulation continues unless decreasing either both of the input voltage and the output voltage
in order to reduce the internal current consumption, or decreasing the ambient temperature.
Table 12
Thermal Shutdown Circuit
VOUT Pin Voltage
Operate : 150
°C typ.
*1
VSS level
Release : 120
°C typ.
*1
Set value
*1. Junction temperature
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S-1312B18-A4T1U3 | 功能描述:IC REG LINEAR 150MA HSNT4-A 制造商:ablic u.s.a. inc. 系列:* 包装:剪切带（CT） 零件状态:在售 安装类型:表面贴装 封装/外壳:4-SMD，扁平引线裸焊盘 供应商器件封装:HSNT-4-A 标准包装:1 |
| S-1312B18-A4T2U3 | 功能描述:IC REG LINEAR 150MA HSNT4-B 制造商:ablic u.s.a. inc. 系列:* 包装:剪切带（CT） 零件状态:在售 安装类型:表面贴装 封装/外壳:4-SMD，扁平引线裸焊盘 供应商器件封装:HSNT-4-A 标准包装:1 |
| S-1312B19-M5T1U3 | 制造商:Seiko Instruments Inc (SII) 功能描述:150MA VOLT REG ULTRA LOW IQ |
| S-1312B1J-A4T1U3 | 制造商:Seiko Instruments Inc (SII) 功能描述:150MA VOLT REG ULTRA LOW IQ |
| S-1312B1J-M5T1U3 | 制造商:Seiko Instruments Inc (SII) 功能描述:150MA VOLT REG ULTRA LOW IQ |
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