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參數(shù)資料
| 型號： | TLE4470 |
| 廠商： | SIEMENS AG |
| 英文描述： | Dual Low-Drop Voltage Regulator |
| 中文描述： | 雙低壓降穩(wěn)壓器 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大?。?/td> | 121K |
| 代理商： | TLE4470 |
TLE 4470
Semiconductor Group
14
1998-11-01
Input, Output
The input capacitor
C
I
is necessary for compensating line influences. Using a resistor of
approx. 1
in series with
C
I
, the LC circuit of input inductivity and input capacitance can
be damped. To stabilize the regulation circuits of the stand-by and main regulator, output
capacitors
C
Q1
and
C
Q2
are necessary. Stability is guaranteed at values
C
Q1
≥
6
μ
F &
C
Q2
≥
10
μ
F, both with an ESR
≤
10
within the operating temperature range.
For the TLE 4470 G (P-DSO-20-6) the output voltage
V
Q2
of the main regulator can be
adjusted to 5 V
≤
V
Q2rated
≤
20 V by connecting an external voltage divider to the voltage
adjust pin VA. For
V
Q2
= 5 V the voltage adjust pin has to be connected directly to the
main output.
For calculating
V
Q
or
R
1
&
R
2
respectively the following equations can be used:
V
Q
=
V
ref
×
(
R
1
+
R
2
) /
R
2
or
R
1
=
R
×
(
V
Q
/
V
ref
)
R
2
=
R
×
R
1
/ (
R
1
–
R
)
Definitions:
R
=
R
1
//
R
2
;
R
≈
100 k
V
ref
= Output voltage of stand by regulator, typical 5 V
Disable
The main regulator of the TLE 4470 can be switched OFF by a voltage of 2.3 V at pin
DIS. Reducing this voltage below 1.4 V will switch ON the main regulator again.
Reset Timing
The power-on reset delay time is defined by the charging time of an external capacitor
C
d
which can be calculated as follows:
C
d
=
(
t
d
×
I
d
) /
V
Definitions:
C
d
= delay capacitor
t
d
= delay time
I
d
= charge current, typical 5
μ
A
V =
V
dt
, typical 1.8 V
V
dt
= upper delay switching threshold at
C
d
for reset delay time
The reset reaction time
t
rr
is the time it takes the voltage regulator to set the reset out
LOW after the output voltage has dropped below the reset threshold. It is typically 2
μ
s
for delay capacitor of 100 nF. For other values for
C
d
the reaction time can be estimated
using the following equation:
t
rr
≈
20 s/F
×
C
d
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLE4470_08 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Dual Low-Drop Voltage Regulator Very low dropout |
| TLE4470G | 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 |
| TLE4470GNT | 制造商:Infineon Technologies AG 功能描述:LDO Regulator Pos 5V5V 0.18A/0.35A 20-Pin DSO |
| TLE4470GNTMA1 | 制造商:Infineon Technologies AG 功能描述:LDO Regulator Pos 5V5V 0.18A/0.35A 20-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/ADJ 20DSO |
| TLE4470GS | 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 |
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