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參數(shù)資料
| 型號(hào)： | RT9164-33CL |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5.0放大器正電壓穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 8/12頁(yè) |
| 文件大?。?/td> | 266K |
| 代理商： | RT9164-33CL |
RT9164
www.richtek-ic.com.tw
8
DS9164-08 May 2001
Application Information
Output voltage adjustment
Like most regulators, the RT9164 regulates the
output by comparing the output voltage to an
internally generated reference voltage. On the
adjustable version as shown in Fig.4, the V
REF
is
available externally as 1.25V between V
OUT
and
ADJ. The voltage ratio formed by R1 and R2 should
be set to conduct 10mA (minumum output load).
The output voltage is given by the following
equation:
V
OUT
= V
REF
(1+
2
1
R
R
) + I
ADJ
×
R
2
On fixed versions of RT9164, the voltage divider is
provided internally.
Fig. 4 Basic Adjustable Regulator
Input Bypass Capacitor
An input capacitor is recommended. A 10
μ
F tantalum
on the input is a suitable input bypassing for almost
all applications.
Adjust Terminal Bypass Capacitor
The adjust terminal can be bypassed to ground with
a bypass capacitor (C
ADJ
) to improve ripple rejection.
This bypass capacitor prevents ripple from being
amplified as the output voltage is increased. At any
ripple frequency, the impedance of the C
ADJ
should
be less than R1 to prevent the ripple from being
amplified:
(2
π
* f
RIPPLE
* C
ADJ
)
<
R1
The R1 is the resistor between the output and the
adjust pin. Its value is normally in the range of 100-
200
. For example, with R1 = 124
and f
RIPPLE
=
120Hz, the C
ADJ
should be
>
11
μ
F.
Output Capacitor
RT9164 requires a capacitor from V
OUT
to GND to
provide compensation feedback to the internal gain
stage. This is to ensure stability at the output
terminal. Typically, a 10
μ
F tantalum or 50
μ
F
aluminum electrolytic is sufficient.
Note: It is important that the ESR for this capacitor
does not exceed 0.5
.
The output capacitor does not have a theoretical
upper limit and increasing its value will increase
stability. C
OUT
= 100
μ
F or more is typical for high
current regulator design.
Load Regulation
When the adjustable regulator is used (Fig.5), the
best load regulation is accomplished when the top of
the resistor divider (R1) is connected directly to the
output pin of the RT9164. When so connected, R
P
is
not multiplied by the divider ratio. For Fixed output
version, the top of R1 is internally connected to the
output and ground pins can be connected to low side
of the load.
Fig. 5 Best Load Regulation Using Adjustable Output
Regulator
Thermal Protection
RT9164 has thermal protection which limits junction
temperature to 150
°
C. However, device functionality
RT9164
VIN
GND
VOUT
V
IN
≈
≈
Connect R2 to load
R
L
R
Parasitic
Line Resistance
R
2
R1
(Connect R1
to case R2)
RT9164
VIN
ADJ
VOUT
V
REF
R1
R2
V
OUT
I
ADJ
65
μ
A
V
IN
10
μ
F
+
C
ADJ
+10
μ
F
+
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| RT9164-33CLR | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RT9164-33CLR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1A FIXED AND ADJUSTABLE LOW DROPOUT POSITIVE VOLTAGE REGULATORS |
| RT9164-35CG | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1A FIXED AND ADJUSTABLE LOW DROPOUT POSITIVE VOLTAGE REGULATORS |
| RT9164-35CL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1A FIXED AND ADJUSTABLE LOW DROPOUT POSITIVE VOLTAGE REGULATORS |
| RT9164-35CLR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1A FIXED AND ADJUSTABLE LOW DROPOUT POSITIVE VOLTAGE REGULATORS |
| RT9164A | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:1A Fixed and Adjustable Low Dropout Positive Voltage Regulators |
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