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参数资料
| 型号： | TLE4271S |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 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, 0.7 V DROPOUT, PSFM7 |
| 封装： | PLASTIC, TO-220, 7 PIN |
| 文件页数： | 16/22页 |
| 文件大小： | 164K |
| 代理商： | TLE4271S |
TLE 4271
Data Sheet Rev. 2.1
3
2000-02-14
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustment, to a voltage that is proportional to the output voltage and drives
the base of a series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element.
If the output voltage decreases below 4.5 V, an external capacitor
C
D on pin 4 (D) will be
discharged by the reset generator. If the voltage on this capacitor
V
D drops below VDRL,
a reset signal is generated on pin 2 (RO), i.e. reset output is set low. If the output voltage
rises above 4.5 V,
C
D will be charged with constant current. After the power-on-reset
time
V
D reaches VDU and the reset output will be set high again. The value of the power-
on-reset time can be set within a wide range depending on the capacity of
C
D. The value
of the pull-up resistor at reset output is typically 30 k
.
After
V
D has reached the voltage VDU and reset was set to high, the watchdog circuit is
enabled and discharges
C
D with a constant current. If there is no positive-going edge
observed at watchdog input,
C
D will be discharged down to VDWL. Then reset will be set
low and the watchdog circuit will be disabled.
C
D will be charged with the current as at
power-on reset until
V
D reaches VDU and reset will be set high again.
If a watchdog pulse will be observed before
C
D is discharged down to VDWL, the watchdog
circuit will be enabled and
C
D will be charged too, but reset will not be set low. After VD
has reached
V
DU, the periodical behavior starts again.
The IC also incorporates a number of internal circuits for protection against:
Overload
Overvoltage
Overtemperature
Reverse polarity
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相关代理商/技术参数 |
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| TLE4274 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Voltage Regulator |
| TLE4274 V10 | 功能描述:低压差稳压器 - LDO Low Drop Voltage Regulator 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 |
| TLE4274 V50 | 功能描述:低压差稳压器 - LDO LW Drop VOLT REGLTR 5V 200mA 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 |
| TLE4274 V85 | 功能描述:低压差稳压器 - LDO LOW DROPOUT REGULATOR 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 |
| TLE4274_07 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Low Drop Voltage Regulator Output voltage 5 V, 8.5 V or 10 V |
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