參數(shù)資料
型號(hào)： LT1579CS8-5
廠商： LINEAR TECHNOLOGY CORP
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： CAP 33UF 80V ELECT TG SMD
中文描述： 5 V FIXED POSITIVE LDO REGULATOR, 0.75 V DROPOUT, PDSO8
封裝： 0.150 INCH, PLASTIC, SO-8
文件頁(yè)數(shù)： 17/20頁(yè)
文件大?。?/td> 352K
代理商： LT1579CS8-5
17
LT1579
APPLICATIO
S I
N
FOR
ATIO
U
resistance from the junction to a ground lead is 40
°
C/W for
16-lead SSOP, 32
°
C/W for 16-lead SO and 35
°
C/W for
8-lead S0.
W
U
Table 2. 8-Lead SO Package (S8)
COPPER AREA
TOPSIDE*
BACKSIDE
2500 sq mm 2500 sq mm
1000 sq mm 2500 sq mm
225 sq mm
2500 sq mm
100 sq mm
2500 sq mm
*Device is mounted on topside.
Table 3. 16-Lead SO Package (S)
COPPER AREA
TOPSIDE*
BACKSIDE
2500 sq mm 2500 sq mm
1000 sq mm 2500 sq mm
225 sq mm
2500 sq mm
100 sq mm
2500 sq mm
*Device is mounted on topside.
Table 4. 16-Lead SSOP Package (GN)
COPPER AREA
TOPSIDE*
BACKSIDE
2500 sq mm 2500 sq mm
1000 sq mm 2500 sq mm
225 sq mm
2500 sq mm
100 sq mm
2500 sq mm
*Device is mounted on topside.
THERMAL RESISTANCE
BOARD AREA (JUNCTION-TO-AMBIENT)
2500 sq mm
2500 sq mm
2500 sq mm
2500 sq mm
73
°
C/W
75
°
C/W
80
°
C/W
90
°
C/W
THERMAL RESISTANCE
BOARD AREA (JUNCTION-TO-AMBIENT)
2500 sq mm
2500 sq mm
2500 sq mm
2500 sq mm
55
°
C/W
58
°
C/W
60
°
C/W
68
°
C/W
THERMAL RESISTANCE
BOARD AREA (JUNCTION-TO-AMBIENT)
2500 sq mm
2500 sq mm
2500 sq mm
2500 sq mm
70
°
C/W
75
°
C/W
80
°
C/W
95
°
C/W
Calculating Junction Temperature
Example: Given an output voltage of 5V, an input voltage
range of 5V to 7V for V
IN1
and 8V to 10V for V
IN2
, with an
output current range of 10mA to 150mA and a maximum
ambient temperature of 50
°
C, what will the maximum
junction temperature be
When run from the primary input, current drawn from the
secondary input is negligible and worst-case power dissi-
pation will be:
(I
OUT(MAX)
)(V
IN1(MAX)
– V
OUT
) + (I
GND
)(V
IN1(MAX)
)
Where:
I
OUT(MAX)
= 150mA
V
IN1(MAX)
= 7V
I
GND
at (I
OUT
= 150mA, V
IN1
= 7V) = 2mA
Therefore,
P = (150mA)(7V – 5V) + (2mA)(7V) = 0.31W
When switched to the secondary input, current from the
primary input is negligible and worst-case power dissipa-
tion will be:
(I
OUT(MAX)
)(V
IN2(MAX)
– V
OUT
) + (I
GND
)(V
IN2(MAX)
)
Where:
I
OUT(MAX)
= 150mA
V
IN2(MAX)
= 10V
I
GND
at (I
OUT
= 150mA, V
IN2
= 10V) = 2mA
Therefore,
P = (150mA)(10V – 5V) + (2mA)(10V) = 0.77W
Using a 16-lead SO package, the thermal resistance will be
in the range of 55
°
C/W to 68
°
C/W dependent upon the
copper area. So the junction temperature rise above
ambient will be approximately equal to:
(0.77W)(65
°
C/W) = 50.1
°
C
The maximum junction temperature will then be equal to
the maximum temperature rise above ambient plus the
maximum ambient temperature or:
T
JMAX
= 50.1
°
C + 50
°
C = 100.1
°
C
Protection Features
The LT1579 incorporates several protection features that
make it ideal for use in battery-powered circuits. In addi-
tion to the normal protection features associated with
monolithic regulators, such as current limiting and ther-
mal limiting, the device is protected against reverse input
voltages, reverse output voltages and reverse voltages
from output to input.
Current limit protection and thermal overload protection
are intended to protect the device against current overload
conditions at the output of the device. For normal opera-
tion, the junction temperature should not exceed 125
°
C.
Current limit protection is designed to protect the device
if the output is shorted to ground. With the output shorted
to ground, current will be drawn from the primary input
until it is discharged. The current drawn from V
IN2
will not
increase until the primary input is discharged. This pre-
vents a short-circuit on the output from discharging both
inputs simultaneously.
相關(guān)PDF資料
PDF描述
LT1579-3 300mA Dual Input Smart Battery Backup Regulator
LT1579CGN 300mA Dual Input Smart Battery Backup Regulator
LT1579CGN-3 300mA Dual Input Smart Battery Backup Regulator
LT1579CGN-3.3 300mA Dual Input Smart Battery Backup Regulator
LT1579CGN-5 300mA Dual Input Smart Battery Backup Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1579CS8-5#PBF 功能描述:IC LDO REG SMART DUAL 5V 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LT1579CS8-5#TR 功能描述:IC REG LDO SMART DUAL 5V 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR)
LT1579CS8-5#TRPBF 功能描述:IC LDO REG SMART DUAL 5V 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT
LT1579IGN 功能描述:IC LDO REG SMART DUAL ADJ 16SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:Impedance Track™ 功能:燃料，電量檢測(cè)計(jì)/監(jiān)控器 電池化學(xué):鋰離子（Li-Ion） 電源電壓:2.4 V ~ 2.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:帶卷 (TR) 產(chǎn)品目錄頁(yè)面:1020 (CN2011-ZH PDF) 配用:BQ27350EVM-ND - BQ27350EVM 其它名稱:296-21665-2
LT1579IGN#PBF 功能描述:IC LDO REG SMART DUAL ADJ 16SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT
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

*
*
*