參數(shù)資料
型號： LT1376
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗輻射高效，5安培開關(guān)穩(wěn)壓器
文件頁數(shù)： 12/28頁
文件大?。?/td> 232K
代理商： LT1376
12
LT1375/LT1376
APPLICATIO
S I
FOR
ATIO
U
5. After making an initial choice, consider the secondary
things like output voltage ripple, second sourcing, etc.
Use the experts in the Linear Technology’s applica-
tions department if you feel uncertain about the final
choice. They have experience with a wide range of
inductor types and can tell you about the latest devel-
opments in low profile, surface mounting, etc.
W
U
U
Table 2
SERIES
RESIS-
TANCE(
)
CORE
MATER-
IAL
VENDOR/
PART NO.
Coiltronics
CTX5-1
CTX10-1
CTX20-1
CTX15-2
CTX20-3
CTX20-4
CTX5-1P
CTX10-1P
CTX15-1P
CTX20-1P
CTX20-2P
CTX20-4P
Sumida
CDRH64
CDRH74
CDRH73
CDRH73
CD73
CD73
CD104
CD104
Gowanda
SM20-102K
SM20-152K
SM20-222K
Dale
IHSM-4825
IHSM-4825
IHSM-5832
IHSM-5832
IHSM-7832
VALUE
(
μ
H)
DC
CORE
TYPE
HEIGHT
(mm)
(Amps)
5
10
20
15
20
20
5
10
15
20
20
20
2.3
1.9
1.0
1.8
1.5
2.2
1.8
1.6
1.2
1.0
1.3
1.8
Tor
Tor
Tor
Tor
Tor
Tor
Tor
Tor
Tor
Tor
Tor
Tor
0.027
0.039
0.137
0.058
0.093
0.059
0.021
0.030
0.046
0.081
0.052
0.039
KM
μ
KM
μ
KM
μ
KM
μ
KM
μ
KM
μ
52
52
52
52
52
52
4.2
4.2
4.2
6.0
4.7
6.4
4.2
4.2
4.2
4.2
6.0
6.35
10
22
10
22
10
18
10
18
1.7
1.2
1.7
1.1
1.4
1.1
2.4
1.7
SC
SC
SC
SC
Open
Open
Open
Open
0.084
0.077
0.055
0.15
0.062
0.085
0.041
0.062
Fer
Fer
Fer
Fer
Fer
Fer
Fer
Fer
4.5
4.5
3.4
3.4
3.5
3.5
4.0
4.0
10
15
22
1.3
1.3
1.3
Open
Open
Open
0.038
0.049
0.059
Fer
Fer
Fer
7.0
7.0
7.0
10
22
10
22
22
3.1
1.7
4.3
2.8
3.8
Open
Open
Open
Open
Open
0.071
0.152
0.053
0.12
0.054
Fer
Fer
Fer
Fer
Fer
5.6
5.6
7.1
7.1
7.1
Tor = Toroid
SC = Semi-closed geometry
Fer = Ferrite core material
52 = Type 52 powdered iron core material
KM
μ
= Kool M
μ
Output Capacitor
The output capacitor is normally chosen by its Effective
Series Resistance (ESR), because this is what determines
output ripple voltage. At 500kHz, any polarized capacitor
is essentially resistive. To get low ESR takes volume so
physically smaller capacitors have high ESR. The ESR
range for typical LT1376 applications is 0.05
to 0.5
. A
typical output capacitor is an AVX type TPS, 100
μ
F at 10V,
with a guaranteed ESR less than 0.1
. This is a “D” size
surface mount solid tantalum capacitor. TPS capacitors
are specially constructed and tested for low ESR, so they
give the lowest ESR for a given volume. The value in
microfarads is not particularly critical, and values from
22
μ
F to greater than 500
μ
F work well, but you cannot
cheat mother nature on ESR. If you find a tiny 22
μ
F solid
tantalum capacitor, it will have high ESR, and output ripple
voltage will be terrible. Table 3 shows some typical solid
tantalum surface mount capacitors.
Table 3. Surface Mount Solid Tantalum Capacitor ESR
and Ripple Current
E Case Size
AVX TPS, Sprague 593D
AVX TAJ
D Case Size
AVX TPS, Sprague 593D
AVX TAJ
C Case Size
AVX TPS
AVX TAJ
B Case Size
AVX TAJ
ESR (Max.,
)
0.1 to 0.3
0.7 to 0.9
Ripple Current (A)
0.7 to 1.1
0.4
0.1 to 0.3
0.9 to 2.0
0.7 to 1.1
0.36 to 0.24
0.2 (typ)
1.8 to 3.0
0.5 (typ)
0.22 to 0.17
2.5 to 10
0.16 to 0.08
Many engineers have heard that solid tantalum capacitors
are prone to failure if they undergo high surge currents.
This is historically true, and type TPS capacitors are
specially tested for surge capability, but surge ruggedness
is not a critical issue with the outputcapacitor. Solid
tantalum capacitors fail during very high turn-onsurges,
which do not occur at the output of regulators. High
相關(guān)PDF資料
PDF描述
LT1376C RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LT1376CN8-5 Octal D-Type Transparent Latches With 3-State Outputs 20-SO 0 to 70
LT1376CS RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LT1376CS8 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LT1376CS8-5 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1376C 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5A, 500kHz Step-Down Switching Regulators
LT1376CN8 功能描述:IC REG BUCK ADJ 1.5A 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤
LT1376CN8#PBF 功能描述:IC REG BUCK ADJ 1.5A 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤
LT1376CN8-5 功能描述:IC REG BUCK 5V 1.5A 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 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，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤
LT1376CN8-5#PBF 功能描述:IC REG BUCK 5V 1.5A 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(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)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
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