參數(shù)資料
型號(hào)： LT1121IZ-3.3
廠商： LINEAR TECHNOLOGY CORP
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 128 x 128 pixel format, LED or EL Backlight available
中文描述： 3.3 V FIXED POSITIVE LDO REGULATOR, 0.7 V DROPOUT, PBCY3
封裝： PLASTIC, TO-92, 3 PIN
文件頁(yè)數(shù)： 9/12頁(yè)
文件大?。?/td> 269K
代理商： LT1121IZ-3.3
9
LT1121/LT1121-3.3/LT1121-5
U
S
A
O
PPLICATI
U
U
taken in still air, on 3/32" FR-4 board with 1oz copper. All
NC leads were connected to the ground plane.
Calculating Junction Temperature
Example: given an output voltage of 3.3V, an input voltage
range of 4.5V to 7V, an output current range of 0mA to
100mA, and a maximum ambient temperature of 50
°
C,
what will the maximum junction temperature be
Power dissipated by the device will be equal to:
I
OUT MAX
×
(V
IN MAX
– V
OUT
) + (I
GND
×
V
IN
)
where, I
OUT MAX
= 100mA
V
IN MAX
= 7V
I
GND
at (I
OUT
= 100mA, V
IN
= 7V) = 5mA
so,
P = 100mA
×
(7V – 3.3V) + (5mA
×
7V)
= 0.405W
If we use an SOT-223 package, then the thermal resistance
will be in the range of 50
°
C/W to 65
°
C/W depending on
copper area. So the junction temperature rise above
ambient will be less than or equal to:
0.405W
×
60
°
C/W = 24
°
C
The maximum junction temperature will then be equal to
the maximum junction temperature rise above ambient
plus the maximum ambient temperature or:
T
JMAX
= 50
°
C + 24
°
C = 74
°
C
Table 5. TO-92 Package
THERMAL
RESISTANCE
220
°
C/W
175
°
C/W
Package alone
Package soldered into PC board with plated
through holes only
Package soldered into PC board with 1/4 sq. inch of
copper trace per lead
145
°
C/W
Package soldered into PC board with plated through holes
in board, no extra copper trace, and a clip-on type
heat sink:
Thermalloy type 2224B
Aavid type 5754
160
°
C/W
135
°
C/W
Output Capacitance and Transient Performance
The LTC1121 is designed to be stable with a wide range of
output capacitors. The minimum recommended value is
1
μ
F with an ESR of 3
or less. For applications where
space is very limited, capacitors as low as 0.33
μ
F can be
used if combined with a small series resistor. Assuming
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
80
°
C/W
80
°
C/W
85
°
C/W
91
°
C/W
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
120
°
C/W
120
°
C/W
25
°
C/W
131
°
C/W
Table 1. N8 Package*
COPPER AREA
TOPSIDE
2500 sq mm
1000 sq mm
225 sq mm
1000 sq mm
* Device is mounted on topside. Leads are through hole and are soldered
to both sides of board.
BACKSIDE
2500 sq. mm
2500 sq. mm
2500 sq. mm
1000 sq. mm
BOARD AREA
2500 sq. mm
2500 sq. mm
2500 sq. mm
1000 sq. mm
Table 2. S8 Package
COPPER AREA
TOPSIDE*
2500 sq. mm 2500 sq. mm
1000 sq. mm 2500 sq. mm
225 sq. mm
100 sq. mm
* Device is mounted on topside.
BACKSIDE
BOARD AREA
2500 sq. mm
2500 sq. mm
2500 sq. mm
1000 sq. mm
2500 sq. mm
1000 sq. mm
Table 4. SOT-223 Package
(Thermal Resistance Junction-to-Tab 20
°
C/W)
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
1000 sq. mm 1000 sq. mm
1000 sq. mm
0
* Tab of device attached to topside copper
BOARD AREA
2500 sq. mm
2500 sq. mm
2500 sq. mm
2500 sq. mm
1000 sq. mm
1000 sq. mm
50
°
C/W
50
°
C/W
58
°
C/W
64
°
C/W
57
°
C/W
60
°
C/W
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
Table 3. AS8 Package*
COPPER AREA
TOPSIDE**
2500 sq. mm 2500 sq. mm
1000 sq. mm 2500 sq. mm
225 sq. mm
100 sq. mm
*
Pins 3, 6, and 7 are ground.
** Device is mounted on topside.
BACKSIDE
BOARD AREA
2500 sq. mm
2500 sq. mm
2500 sq. mm
2500 sq. mm
60
°
C/W
60
°
C/W
68
°
C/W
74
°
C/W
2500 sq. mm
2500 sq. mm
相關(guān)PDF資料
PDF描述
LT1121-3.3 Paired Cable; Number of Conductors:30; Conductor Size AWG:18; No. Strands x Strand Size:Solid; Jacket Material:Polyvinylchloride (PVC); Number of Pairs:15; Leaded Process Compatible:Yes; Voltage Nom.:300V RoHS Compliant: Yes
LT1121CZ-5 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1121IN8 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1121IN8-3.3 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1121IN8-5 Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1121IZ-5 功能描述:IC REG LDO 5V .15A TO-92-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:800 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.5V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.7V @ 4A 穩(wěn)壓器數(shù)量:1 電流 - 輸出:4A 電流 - 限制（最小）:4.2A 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-6，D²Pak（5 引線+接片），TO-263BA 供應(yīng)商設(shè)備封裝:TO-263-5 包裝:帶卷 (TR) 其它名稱:AP1184K525L-13AP1184K525LDITR
LT1121IZ-5#PBF 功能描述:IC REG LDO 5V .15A TO-92-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓(xùn)模塊:MIC5365/66 Ultra-small LDO Regulators 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3V 輸入電壓:最高 5.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.155V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?200mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:4-UDFN 裸露焊盤，4-TMLF? 供應(yīng)商設(shè)備封裝:4-TMLF?（1x1） 包裝:Digi-Reel® 其它名稱:576-3192-6
LT1121IZ-5#TR 功能描述:IC REG LDO 5V .15A TO-92-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓(xùn)模塊:More Information on LDOs 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標(biāo)準(zhǔn)）:1.1V @ 800mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:800mA 電流 - 限制（最?。?800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應(yīng)商設(shè)備封裝:D2PAK-3 包裝:管件
LT1121IZ-5#TRPBF 功能描述:IC REG LDO 5V .15A TO-92-3 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓(xùn)模塊:More Information on LDOs 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 15V 電壓 - 壓降（標(biāo)準(zhǔn)）:1.1V @ 800mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:800mA 電流 - 限制（最?。?800mA 工作溫度:0°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:TO-263-4，D²Pak（3 引線+接片），TO-263AA 供應(yīng)商設(shè)備封裝:D2PAK-3 包裝:管件
LT1121MJ8-5 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Fixed Voltage Regulator
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

*
*
*