參數(shù)資料
型號(hào)： LT1054IN8
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Switched-Capacitor Voltage Converter with Regulator
中文描述： SWITCHED CAPACITOR REGULATOR, 25 kHz SWITCHING FREQ-MAX, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁(yè)數(shù)： 13/26頁(yè)
文件大?。?/td> 444K
代理商： LT1054IN8
SLVS033F FEBRUARY 1990 REVISED NOVEMBER 2004
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
power dissipation
The power dissipation of any LT1054 circuit must be limited so that the junction temperature of the device does
not exceed the maximum junction-temperature ratings. The total power dissipation is calculated from two
components–the power loss due to voltage drops in the switches, and the power loss due to drive-current
losses. The total power dissipated by the LT1054 is calculated as:
P
V
CC
V
OUT
I
OUT
V
CC
I
OUT
(0.2)
where both V
CC
and V
OUT
are referenced to ground. The power dissipation is equivalent to that of a linear
regulator. Limited power-handling capability of the LT1054 packages causes limited output-current
requirements, or steps can be taken to dissipate power external to the LT1054 for large input or output
differentials. This is accomplished by placing a resistor in series with C
IN
as shown in Figure 17. A portion of
the input voltage is dropped across this resistor without affecting the output regulation. Since switch current is
approximately 2.2 times the output current and the resistor causes a voltage drop when C
IN
is both charging
and discharging, the resistor chosen is as shown:
R
X
V
X
4.4 I
OUT
Where:
V
X
≈
V
CC
[(LT1054 voltage loss)(1.3) + |V
OUT
|]
and
I
OUT
= maximum required output current
The factor of 1.3 allows some operating margin for the LT1054.
When using a 12-V to 5-V converter at 100-mA output current, calculate the power dissipation without an
external resistor.
P
P
(12 V
700 mW
|
5 V|)(100 mA)
240 mW
(12 V)(100 mA)(0.2)
940 mW
VIN
COUT
R2
R1
C1
LT1054
VOUT
VREF
OSC
VCC
CAP
GND
CAP+
FB/SD
VOUT
Rx
CIN
Pin numbers shown are for the P package.
+
+
1
2
3
4
8
7
6
5
Figure 17. Power-Dissipation-Limiting Resistor in Series With C
IN
(7)
(8)
(9)
相關(guān)PDF資料
PDF描述
LT1054CH Switched-Capacitor Voltage Converter with Regulator
LT1054MH Switched-Capacitor Voltage Converter with Regulator
LT1054LCS8 Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70
LT1054ISW Switched-Capacitor Voltage Converter with Regulator
LT1054CSW Octal Buffers/Drivers With 3-State Outputs 20-SOIC 0 to 70
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1054IN8#PBF 功能描述:IC REG SWITCHED CAP DBL INV 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開(kāi)關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁(yè)面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LT1054IN8#PBF 制造商:Linear Technology 功能描述:DC/DC Controller IC
LT1054IP 功能描述:電荷泵 Switched-Capacitor Voltage Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
LT1054IP 制造商:Texas Instruments 功能描述:Voltage Regulator IC Package/Case:8-PDIP
LT1054IPE4 功能描述:電荷泵 Switched-Capacitor Voltage Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*