- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44992 > LTC3625IDE-1#PBF (LINEAR TECHNOLOGY CORP) POWER SUPPLY SUPPORT CKT, PDSO12 PDF資料下載
參數(shù)資料
| 型號： | LTC3625IDE-1#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PDSO12 |
| 封裝： | 3 X 4 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WGED, DFN-12 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 262K |
| 代理商： | LTC3625IDE-1#PBF |
LTC3625/LTC3625-1
3625f
applicaTions inForMaTion
The buck and boost converters are designed to work with
inductors over a wide range of inductances. Choosing a
higher valued inductor will decrease operating frequen-
cies, while a lower valued inductor will increase frequency
but also increase peak current overshoot/undershoot. For
most applications a 3.3H inductor is recommended. To
maximize efficiency, choose an inductor with a low DC
resistance. Choose an inductor with a DC current rating
at least as large as the maximum IPEAK the application will
see according to the specifications table to ensure that the
inductor does not saturate during normal operation. If the
single inductor application is used, make sure to size the
inductor for the higher of buck or boost peak currents.
Differentcorematerialsandshapeswillchangethesize/cur-
rent and price/current relationship of an inductor. Toroid
or shielded pot cores in ferrite or Permalloy materials
are small and do not radiate much energy, but generally
cost more than powdered iron core inductors with similar
electrical characteristics. Inductors that are very thin or
have a very small volume typically have much higher core
and DCR losses, and will not give the best efficiency. The
choice of which style inductor to use often depends more
on the price versus size, performance and any radiated
EMI requirements than on what the LTC3625/LTC3625-1
family requires to operate.
Table 2 shows several inductors that work well with the
LTC3625/LTC3625-1 regulators. These inductors offer a
good compromise in current rating, DCR and physical
size. Consult each manufacturer for detailed information
on their entire selection of inductors.
Supercapacitor Selection
The LTC3625/LTC3625-1 are designed to charge super-
capacitors of values greater than 0.1F per cell. In general,
lower capacitance cells have higher ESRs, therefore lower
charge currents should be used to help reduce sleep
modulation towards the end of a charge cycle. In general,
the ESR of a supercapacitor cell should not exceed:
ESR
mV
IBUCK
≤
100
where 100mV is the sleep threshold hysteresis. Higher
capacitance cells typically have lower ESRs and can
therefore be charged with higher currents. Typically, the
LTC3625/LTC3625-1 are designed to charge supercapaci-
tors with values up to 100F, but higher capacitance cells
could be used at the expense of greater charge time.
Table 3 shows several supercapacitors that work well with
the LTC3625/LTC3625-1.
Printed Circuit Board Layout Considerations
In order to be able to deliver maximum current under all
conditions,itiscriticalthattheexposedpadonthebackside
of the LTC3625/LTC3625-1 package be soldered to the PC
Table 2. Inductor Manufacturers
MANUFACTURER
PART NUMBER
INDUCTANCE (H)
CURRENT (A)
DCR (mΩ)
SIZE (mm)
Coiltronics
DR73-3R3-R
3.3
3.0
20
7
× 7
Coilcraft
MSS7341-332NL
3.3
3.2
20
7
× 7
Vishay
IHLM2525CZER3R3M11
3.3
6.5
26
6.5
× 6.9
Sumida
CDRH6D28P-3RON
3.0
24
7
× 7
TOKO
B1077AS-3RON
3.0
3.3
30
7.6
× 7.6
Table 3. Supercapacitor Manufacturers
MANUFACTURER
PART NUMBER
VALUE (F)
OPERATING VOLTAGE (V) MAXIMUM ESR (mΩ)
SIZE (mm)
Cooper Bussmann
B1860-2R5107-R
100
2.5
20
18
× 60
Illinois Capacitor
107DCN2R7M
100
2.7
10
22
× 45
NESS Capacitor
ESHSR-0100C0002R7
100
2.7
9
22
× 45
Tecate
TPLS-100//22 X 45F
100
2.7
9
22
× 45
Maxwell
BCAP120P250
120
2.5
26
× 51
相關PDF資料 |
PDF描述 |
|---|---|
| LTC3625EDE#TRPBF | POWER SUPPLY SUPPORT CKT, PDSO12 |
| LTC3625IDE-1#TRPBF | POWER SUPPLY SUPPORT CKT, PDSO12 |
| LTC3632EMS8E#TRPBF | 0.06 A SWITCHING REGULATOR, PDSO8 |
| LTC3632IDD#TRPBF | 0.06 A SWITCHING REGULATOR, PDSO8 |
| LTC3632EDD#PBF | 0.06 A SWITCHING REGULATOR, PDSO8 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3626EUDC#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.2A 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 產(chǎn)品培訓模塊:MIC23xxx HyperLight Load™ Regulators 標準包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關:4MHz 電流 - 輸出:2A 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:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應商設備封裝:8-MLF?（2x2） 產(chǎn)品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
| LTC3626EUDC#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.2A 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝: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:- 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) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LTC3626IUDC#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.2A 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 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:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3626IUDC#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1.2A 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 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:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3630AEDHC#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 0.5A 16DFN |
發(fā)布緊急采購，3分鐘左右您將得到回復。