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參數(shù)資料
| 型號： | TLE4261S |
| 廠商： | SIEMENS A G |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 5-V Low-Drop Voltage Regulator |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PSFM7 |
| 文件頁數(shù)： | 2/18頁 |
| 文件大小： | 122K |
| 代理商： | TLE4261S |
TLE 4261
Semiconductor Group
2
1998-11-01
Application Description
The IC regulates an input voltage
V
I
in the range
V
I
= 6 V to 40 V to
V
Qrated
= 5.0 V. A
reset signal is generated for a maximum output voltage of
V
Q
less than 4.75 V. The reset
delay can be set externally with a capacitor. A connected microprocessor is monitored
by the integrated watchdog circuit. Connecting this input to the input voltage makes the
watchdog function inactive. The presence of a voltage less than 2 V on inhibit input
disables the regulator. The current consumption drops to max. 50
μ
A.
Design Notes for External Components
The input capacitor
C
I
causes a low-resistant powerline and limits the rise times of the
input voltage. The IC is protected against rise times up to 100 V/
μ
s. It is possible to damp
the tuned circuit consisting of supply inductance and input capacitance with a resistor of
approx. 1
in series to
C
I
.
The output capacitor maintains the stability of the regulating loop. Stability is guaranteed
with a rating of 22
μ
F at an ESR of 3
max. in the operating temperature range.
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 controls
the base of the series PNP 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
drops below 95.5 % of its typical value for more than 2
μ
s, a reset signal is triggered on
pin 3 and an external capacitor is discharged on pin 5. The reset signal is not cancelled
until the voltage on the capacitor has exceeded the upper switching threshold
V
DT
. A
positive-edge-triggered watchdog circuit monitors the connected microprocessor and
will likewise trigger a reset if pulses are missing. The IC can be disabled by a low level
on the inhibit input and the current consumption drops to < 50
μ
A.
The IC also incorporates a number of circuits for protection against:
G
Overload
G
Overvoltage
G
Overtemperature
G
Reverse polarity
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLE4262 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:5-V Low Drop Voltage Regulator |
| TLE4262G | 功能描述:低壓差穩(wěn)壓器 - LDO LOW DROPOUT REGULATOR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TLE4262G GEG | 制造商:Siemens 功能描述:5 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PDSO20 |
| TLE4262GM | 功能描述:低壓差穩(wěn)壓器 - LDO REGULATOR RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TLE4262GMXUMA1 | 制造商:Infineon Technologies AG 功能描述:LDO Regulator Pos 5V 0.2A 14-Pin DSO 制造商:Infineon Technologies AG 功能描述:LINEAR VOLTAGE REGULATOR - Tape and Reel |
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