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參數(shù)資料
| 型號： | LT3494EDDB |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.25 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 261K |
| 代理商： | LT3494EDDB |
LT3494/LT3494A
10
3494fb
TYPICAL APPLICATIONS
Figure 5. One Li-Ion Cell Input Boost Converter with the LT3494
APPLICATIONS INFORMATION
the CAP pin will improve efciency and lower the stress
placed on the internal Schottky diode.
Board Layout Considerations
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
To maximize efciency, switch rise and fall times are made
as short as possible. To prevent electromagnetic interfer-
ence (EMI) problems, proper layout of the high frequency
switching path is essential. The voltage signal of the SW pin
has sharp rising and falling edges. Minimize the length and
area of all traces connected to the SW pin and always use
a ground plane under the switching regulator to minimize
interplane coupling. In addition, the FB connection for
the feedback resistor R1 should be tied directly from the
Vout pin to the FB pin and be kept as short as possible,
ensuring a clean, noise-free connection. Recommended
component placement is shown in Figure 4.
SW
GND
VCC
CTRL
CAP
VOUT
FB
SHDN
GND
CTRL
VIAS TO GROUND PLANE REQUIRED
TO IMPROVE THERMAL PERFORMANCE
SHDN
3494 F04
Figure 4. Recommended Layout
SW
CAP
VCC
SHDN
CTRL
7
6
2
3
5
4
VOUT
FB
GND
TURN ON/OFF
VOUT DIMMING
R1
3494 F05
LT3494
C2
4.7
μF
L1
15
μH
C1
0.22
μF
C3
2.2
μF
C1, C2: X5R OR X7R WITH SUFFICIENT VOLTAGE RATING
C3: MURATA GRM31MR71E225K
L1: MURATA LQH32CN150K53
8
1
VIN
3V TO 4.2V
VOUT
LOAD CURRENT (mA)
0.1
60
EFFICIENCY
(%)
POWER
LOSS
(mW)
70
80
90
1
10
100
3494 TA01c
50
40
30
20
160
200
240
280
120
80
40
0
VIN = 3.6V
LOAD FROM
CAPACITOR
LOAD FROM
VOUT
3.6V to 16V Efciency
VOUT
R1 VALUE REQUIRED
(M
Ω)
MAXIMUM OUTPUT CURRENT AT
3V INPUT (mA)
25
3.57
8.6
24
3.40
9.3
23
3.24
10.0
22
3.09
10.6
21
2.94
11.3
20
2.80
12.1
19
2.67
12.9
18
2.49
13.6
17
2.37
14.8
16
2.21
16.0
15
2.05
17.2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3494EDDB#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST DFN-8 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, DFN-8; Primary Input Voltage:16V; No. of Outputs:1; Output Current:180mA; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:8-DFN; Supply Voltage Max:16V ;RoHS Compliant: Yes |
| LT3494EDDB#TRM | 制造商:Linear Technology 功能描述:MICROPOWER LOW NOISE BOOST CONVERTERS WITH OUTPUT DISCONNECT |
| LT3494EDDB#TRMPBF | 功能描述:IC REG BOOST ADJ 0.18A 8DFN 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:- 產(chǎn)品培訓(xùn)模塊:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色產(chǎn)品:BD91x Series Step-Down Regulators 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:兩者兼有 輸出數(shù):2 輸出電壓:3.3V，0.8 V ~ 2.5 V 輸入電壓:4.5 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關(guān):1MHz 電流 - 輸出:1.5A 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:20-VFQFN 裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:VQFN020V4040 產(chǎn)品目錄頁面:1373 (CN2011-ZH PDF) 其它名稱:BD9152MUV-E2TR |
| LT3494EDDB#TRPBF | 功能描述:IC REG BOOST ADJ 0.18A 8DFN 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:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LT3494EDDBTRMPBF | 制造商:Linear Technology 功能描述:Boost Converter uPower Low Noise DFN8EP |
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