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參數(shù)資料
| 型號(hào)： | UTCLD1117 |
| 廠商： | 友順科技股份有限公司 |
| 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)： | 11/12頁(yè) |
| 文件大小： | 148K |
| 代理商： | UTCLD1117 |
UTC LD1117/A
LINEAR INTEGRATED CIRCUIT
LD1117/A ADJUSTABLE APPLICATION NOTE
The LD1117/A ADJUSTABLE has a thermal stabilized 1.25
±
0.012V reference voltage between the OUT and ADJ
pins. I
ADJ
is 60
μ
A typ. (120
μ
A max.) and
I
ADJ
is 1
μ
A typ. (5
μ
A max.).
R1 is normally fixed to 120
. From figure 7 we obtain:
V
OUT
=V
REF
+R2(I
ADJ
+ I
R1
)=V
REF
+ R2(I
ADJ
+ V
REF
/ R1)=V
REF
(1+R2/R1) + R2 x I
ADJ
.
In normal application R2 value is in the range of few Kohm,, so the R2 X I
ADJ
product could not be considered in the
V
OUT
calculation; then the above expression becomes: V
OUT
=V
REF
(1+R2/R1)
In order to have the better load regulation it is important to realize a good Kelvin connection of R1 and R2 resistors.
In particular R1 connection must be realized very close to OUT and ADJ pin, while R2 ground connection must be
placed as near as possible to the negative Load pin. Ripple rejection can be improved by introducing a 10
μ
F
electrolytic capacitor placed in parallel to the R2 resistor (See Fig. 8)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
11
QW-R102-006,H
FIG.7 Adjustable Output Voltage Application Circuit
FIG.8 Adjustable Output Voltage Application with improved Ripple Rejection.
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| UTCLD1117A | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| UTCLD1117A | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS |
| UTCLD3870 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LINEAR INTEGRATED CIRCUIT |
| UTCLM1875 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:20W AUDIO POWER AMPLIFIER |
| UTCLM2954 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:300 mA LOW-DROPOUT VOLTAGE REGULATOR |
| UTCLM2954-3.3 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:300 mA LOW-DROPOUT VOLTAGE REGULATOR |
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