參數(shù)資料
型號(hào)： LTC3405AES6-1.8
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
中文描述： 0.63 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO6
封裝： PLASTIC, MO-193, TSOT-23, 6 PIN
文件頁(yè)數(shù)： 11/16頁(yè)
文件大?。?/td> 235K
代理商： LTC3405AES6-1.8
11
LTC3405A-1.5/LTC3405A-1.8
sn3405a1518 3405a1518fs
APPLICATIOU
PC Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC3405A series parts. These items are also illustrated
graphically in Figures 4 and 5. Check the following in your
layout:
1. The power traces, consisting of the GND trace, the SW
trace and the V
IN
trace should be kept short, direct and
wide.
2. Does the (+) plate of C
IN
connect to V
IN
as closely as
possible This capacitor provides the AC current to the
internal power MOSFETs.
W
U
U
Figure 4. LTC3405A-1.8 Layout Diagram
Figure 5. LTC3405A-1.8 Suggested Layout
RUN
LTC3405A-1.8
GND
SW
6
L1
BOLD LINES INDICATE HIGH CURRENT PATHS
V
IN
V
OUT
3405A1518 F04
4
5
1
3
+
–
2
MODE
V
OUT
V
IN
C
IN
C
OUT
LTC3405A-1.8
GND
3405A1518 F05
PIN 1
V
OUT
V
IN
SW
VIA TO V
IN
C
OUT
C
IN
L1
3. Keep the (–) plates of C
IN
and C
OUT
as close as possible.
Design Example
As a design example, assume the LTC3405A-1.8 is used
in a single lithium-ion battery-powered cellular phone
application. The V
IN
will be operating from a maximum of
4.2V down to about 2.7V. The load current requirement
is a maximum of 0.25A but most of the time it will be in
standby mode, requiring only 2mA. Efficiency at both low
and high load currents is important. Output voltage is
1.8V. With this information we can calculate L using
equation (1),
V
V
L
IN
)
Substituting V
OUT
= 1.8V, V
IN
= 4.2V,
I
L
= 100mA and
f = 1.5MHz in equation (3) gives:
L
f
I
V
OUT
OUT
=
( )
(
1
1
(3)
L
V
MHz
mA
V
V
H
=
μ
1 8
.
1 5
.
100
(
1
1 8
4 2
.
6 8
.
)
.
For best efficiency choose a 300mA or greater inductor
with less than 0.3
series resistance.
C
IN
will require an RMS current rating of at least 0.125A
I
LOAD(MAX)
/2 at temperature and C
OUT
will require an ESR
of less than 0.5
. In most cases, a tantalum capacitor will
satisfy this requirement.
Figure 6 shows the complete circuit along with its effi-
ciency curve.
相關(guān)PDF資料
PDF描述
LTC3405 Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LTC3405A Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger
LTC3405A-1.8 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
LTC3406BES5 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT
LTC3406BES5-1.5 256 x 18 3.3-V asynchronous FIFO memory 56-SSOP 0 to 70
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3405AES6TRMPBF 制造商:Linear Technology 功能描述:LTC3405A adj 300mA SD dc-dc converter
LTC3405ES6 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 5.5V 6-Pin TSOT-23
LTC3405ES6#PBF 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 2.5V to 5.5V 6-Pin TSOT-23
LTC3405ES6#TR 功能描述:IC REG BUCK SYNC ADJ .3A SOT23-6 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: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(wú) 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
LTC3405ES6#TRM 功能描述:IC REG BUCK SYNC ADJ .3A SOT23-6 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:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:升壓（升壓） 輸出類型:兩者兼有 輸出數(shù):1 輸出電壓:5V，2 V ~ 16.5 V 輸入電壓:2 V ~ 16.5 V PWM 型:- 頻率 - 開關(guān):45kHz 電流 - 輸出:50mA 同步整流器:無(wú) 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:8-PDIP
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*