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參數(shù)資料
| 型號(hào)： | TLE4267G |
| 廠商： | SIEMENS A G |
| 元件分類： | 基準(zhǔn)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, 0.6 V DROPOUT, PSSO7 |
| 文件頁(yè)數(shù)： | 2/16頁(yè) |
| 文件大?。?/td> | 139K |
| 代理商： | TLE4267G |
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TLE 4267
Semiconductor Group
2
1998-11-01
Design Notes for External Components
The input capacitor
C
I
is necessary for compensation line influences. The resonant
circuit consisting of lead inductance and input capacitance can be damped by a resistor
of approx. 1
in series with
C
I
. The output capacitor is necessary for the stability of the
regulating circuit. Stability is guaranteed at values of
≥
22
μ
F and an ESR of
≤
3
within
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 drives
the base of the series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturating of the power element.
A comparator in the reset-generator block compares a reference that is independent of
the input voltage to the scaled-down output voltage. If this reaches a value of 4.5 V, the
reset-delay capacitor is discharged and then the reset output is set Low. As the output
voltage increases again, the reset-delay capacitor is charged with constant current from
V
Q
= 4.5 V onwards. When the capacitor voltage reaches the upper switching threshold,
reset goes High again. The reset delay can be set within wide range by selection of the
external capacitor.
With the integrated turn-ON/turn-OFF logic it is simple to implement delayed turn-OFF
without external components.
Truth Table for Turn-ON/Turn-OFF Logic
Pin 2: (Inhibit, E2) Enable function, active High
Pin 6: (Hold, E6) Hold and release function, active Low
Pin 2
L
H
H
Pin 6
X
X
L
V
Q
OFF
ON
ON
Remarks
Initial state, pin 6 internally pulled up
Regulator switched on via pin 2, by ignition for example
Pin 6 clamped active to ground by controller while pin 2 is still
high
Previous state remains, even ignition is shut off: self-holding
state
Ignition shut off while regulator is in self-holding state
Regulator shut down by releasing of pin 6 while pin 2 remains
Low, final state. No active clamping required by external self-
holding circuit (
μ
C) to keep regulator shut off.
X
L
ON
L
L
L
H
ON
OFF
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLE4267GATMA1 | 制造商:Infineon Technologies AG 功能描述:LDO Regulator Pos 5V 0.4A 8-Pin(7+Tab) TO-263 制造商:Infineon Technologies AG 功能描述:LINEAR VOLTAGE REGULATOR - Tape and Reel 制造商:Infineon Technologies AG 功能描述:LINEAR VOLTAGE REGULATOR - Cut TR (SOS) 制造商:Infineon Technologies AG 功能描述:IC REG LDO 5V 0.4A TO263-7 |
| TLE4267GM | 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TLE4267GMXUMA1 | 制造商:Infineon Technologies AG 功能描述:LDO Regulator Pos 5V 0.4A 14-Pin DSO 制造商:Infineon Technologies AG 功能描述:LINEAR VOLTAGE REGULATOR - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC REG LDO 5V 0.4A 14DSO |
| TLE4267GNXT | 制造商:Infineon Technologies AG 功能描述: |
| TLE4267GT | 制造商:Infineon Technologies AG 功能描述:LDO Regulator Pos 5V 0.4A 8-Pin(7+Tab) TO-263 T/R |
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