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參數(shù)資料
| 型號： | LT3740EDHC |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.14 A SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 5 X 3 MM, PLASTIC, MO-229WJED-1, DFN-16 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大小： | 234K |
| 代理商： | LT3740EDHC |
LT3740
15
3740fc
APPLICATIONS INFORMATION
Which is adequately lower than the 35mV reverse current
comparator threshold.
CIN is chosen for an RMS current rating of about 5A at
85°C. The output capacitors are chosen for a low ESR
of 0.005Ω to minimize output voltage changes due to
inductor ripple current and load steps. The ripple voltage
will be only:
ΔVOUT(RIPPLE) = ΔIL (ESR) = (3.47A)(0.005Ω) = 17mV
However, a 0A to 10A load step will cause an output
change of up to:
ΔVOUT(STEP) = ΔILOAD (ESR) = (10A)(0.005Ω)= 50mV
An optional 100μF ceramic output capacitor is included to
minimize the effect of ESL in the output ripple.
For the step-up converter, at VIN = 7V, step-up inductor
current is about 27mA. Choose a 22μH inductor and a
1μF output capacitor.
The complete circuit is shown in Figure 4.
Figure 4. Design Example: 2.5V/10A Output
SWB
VIN
SHDN
100k
1μF
XREF
RANGE
PGOOD
VC
BGDP
BIAS
TGATE
SW
PGND
BGATE
GND
LT3740
SN
+
SN
–
FB
3740 F04
L1
2.0μH
CB
1μF
VOUT 2.5V
10A
VIN
7V to 20V
M1
Si4840
M2
Si4840
RS
12mΩ
100μF
6.3V
680μF
4V
2
CIN
100μF
35V
L2
22μH
100k
100pF
18pF
10k
21k
D1
6CWQ03FN
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相關(guān)代理商/技術(shù)參數(shù) |
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| LT3740EDHC#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
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| LT3740EDHC-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Wide Operating Range, Valley Mode, No RSENSE? Synchronous Step-Down Controller |
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