參數(shù)資料
型號(hào)： LD1117V18
廠商： 意法半導(dǎo)體
英文描述： BATTERY LITHIUM 3V 24MM W/PCTERM
中文描述： 低壓差固定或可調(diào)正電壓調(diào)節(jié)器
文件頁數(shù)： 17/28頁
文件大?。?/td> 624K
代理商： LD1117V18
LD1117 SERIES
17/28
Figure 10: Post-Regulated Dual Supply
LD1117 ADJUSTABLE: APPLICATION NOTE
The LD1117 ADJUSTABLE has a thermal
stabilized 1.25±0.012V reference voltage between
the OUT and ADJ pins. I
ADJ
is 60μA typ. (120μA
max.) and
I
ADJ
is 1μA typ. (5μA 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
DJ
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 10μF
electrolytic capacitor placed in parallel to the R2
resistor (see Fig.8).
相關(guān)PDF資料
PDF描述
LD1117V18C BATTERY LITHIUM COIN 3V W/LEGS
LD1117V25 5.0 AMP POSITIVE VOLTAGE REGULATOR
LD1117V25C 5.0 AMP POSITIVE VOLTAGE REGULATOR
LD1117V28 5.0 AMP POSITIVE VOLTAGE REGULATOR
LD1117D30 5.0 AMP POSITIVE VOLTAGE REGULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LD1117V18C 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1117V25 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 0.8A Positive 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
LD1117V25C 功能描述:低壓差穩(wěn)壓器 - LDO 2.5V 0.8A Positive 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
LD1117V28 功能描述:低壓差穩(wěn)壓器 - LDO 2.8V 0.8A Positive 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
LD1117V285 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Fixed Voltage Regulator
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