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參數(shù)資料
| 型號： | LTC3404IMS8#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 204K |
| 代理商： | LTC3404IMS8#PBF |
14
LTC3404
3404fb
Figure 8. Single Lithium-Ion to 2.5V/0.3A Regulator from Design Example
VOUT
2.5V
*
**
***
47pF
10
μF***
CER
6.2
μH*
887k
22
μF**
CER
412k
LTC3404
RUN
ITH
VFB
GND
8
7
6
5
1
2
3
4
PLL LPF
SYNC/MODE
VIN
SW
VIN
2.65V
TO 4.2V
TOKO D63LCB A920CY-6R2M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
TAIYO-YUDEN CERAMIC LMK325BJ106MN
3404 F08a
20pF
TYPICAL APPLICATIO S
U
VOUT
2.5V
0.6A
CIN***
10
μF
CER
20pF
887k
COUT**
22
μF
CER
*
**
***
47pF
4.7
μH*
LTC3404
RUN
ITH
VFB
GND
8
7
6
5
1
2
3
4
PLL LPF
SYNC/MODE
VIN
SW
VIN
3V TO 4.2V
TOKO D52LC A914BYW-4R7M
TAIYO-YUDEN CERAMIC JMK325BJ226MM
TAIYO-YUDEN CERAMIC LMK325BJ106MN
3404 TA03
412k
Single Li-Ion to 2.5V/0.6A Regulator
Using All Ceramic Capacitors
OUTPUT CURRENT (mA)
EFFICIENCY
(%)
95
90
85
80
75
70
0.1
10
100
1000
3404 F8b
1.0
VOUT = 2.5V
L = 6.2
μH
VIN = 3V
VIN = 4.2V
VIN = 3.6V
APPLICATIO S I FOR ATIO
WU
UU
Substituting VOUT = 2.5V, VIN = 4.2V, ΔIL=120mA and
f = 1.4MHz in equation (3) gives:
L
V
MHz
mA
V
H
=
= μ
25
1 4
120
1
25
42
6
.
.(
)
.
A 6.2
μH inductor works well for this application. For best
efficiency choose a 1A inductor with less than 0.25
Ω
series resistance.
CIN will require an RMS current rating of at least 0.15A at
temperature and COUT will require an ESR of less than
0.25
Ω. In most applications, the requirements for these
capacitors are fairly similar.
For the feedback resistors, choose R1 = 412k. R2 can
then be calculated from equation (2) to be:
R
V
R
k use
OUT
2
08
1
1 875 5
8
=
=
.
;
87k
Figure 8 shows the complete circuit along with its effi-
ciency curve.
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相關代理商/技術參數(shù) |
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| LTC3404MPMS8 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.65V to 6V 8-Pin MSOP |
| LTC3404MPMS8#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP 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 |
| LTC3404MPMS8#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.65V to 6V 8-Pin MSOP T/R |
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| LTC3405A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT |
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