参数资料
| 型号： | LTC3401EMS#TR |
| 厂商： | Linear Technology |
| 文件页数： | 9/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 1A 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.6 V ~ 5.5 V |
| 输入电压： | 0.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 3MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP |
| 其它名称： | LTC3401EMSTR |
LTC3401
APPLICATIO S I FOR ATIO
Burst Mode operation is user controlled by driving the
MODE/SYNC pin high to enable and low to disable. It is
R t
MODE
SHDN
V C
recommended that Burst Mode operation be entered after
the part has started up.
COMPONENT SELECTION
Inductor Selection
The high frequency operation of the LTC3401 allows the
use of small surface mount inductors. The minimum
inductance value is proportional to the operating fre-
quency and is limited by the following constraints:
V IN FB
SW V OUT
GND PGOOD
V OUT
3401 F01
Figure 1. Recommended Component Placement. Traces
Carrying High Current Are Direct. Trace Area FB and V C Pins
Are Kept Low. Lead Length to Battery Should be Kept Short
L > μ H and L >
(
3
f
V IN ( MIN ) ? V OUT ( MAX ) – V IN ( MIN )
f ? Ripple ? V OUT ( MAX )
)
H
Output Capacitor Selection
The output voltage ripple has several components. The
bulk value of the capacitor is set to reduce the ripple due
where
f = Operating Frequency (Hz)
to charge into the capacitor each cycle. The max ripple due
to charge is given by:
Ripple = Allowable Inductor Current Ripple (A)
V IN(MIN) = Minimum Input Voltage (V)
VR BULK =
I P ? V IN
C OUT ? V OUT ? f
V
V OUT(MAX) = Maximum Output Voltage (V)
The inductor current ripple is typically set to 20% to 40%
of the maximum inductor current.
For high efficiency, choose an inductor with a high fre-
quency core material, such as ferrite, to reduce core
losses. The inductor should have low ESR (equivalent
series resistance) to reduce the I 2 R losses and must be
able to handle the peak inductor current at full load without
saturating. Molded chokes or chip inductors usually do
not have enough core to support the peak inductor cur-
rents in the 1A to 2A region. To minimize radiated noise,
use a toroid, pot core or shielded bobbin inductor. See
Table 1 for a list of component suppliers.
Table 1. Inductor Vendor Information
where
I P = Peak Inductor Current
The ESR can be a significant factor for ripple in most power
converters. The ripple due to capacitor ESR is simply given
by:
VR CESR = I P ? R ESR V
where
R ESR = Capacitor Series Resistance
Low ESR capacitors should be used to minimize output
voltage ripple. For surface mount applications, AVX TPS
series tantalum capacitors, Sanyo POSCAP, or Taiyo-
Yuden ceramic capacitors are recommended. For through-
hole applications Sanyo OS-CON capacitors offer low ESR
SUPPLIER
Coilcraft
Coiltronics
PHONE
(847) 639-6400
(516) 241-7876
FAX
(847) 639-1469
(516) 241-9339
WEBSITE
www.coilcraft.com
www.coiltronics.com
in a small package size. See Table 2 for a list of component
suppliers.
Table 2. Capacitor Vendor Information
Murata
(814) 237-1431
(800) 831-9172
(814) 238-0490
www.murata.com
SUPPLIER
PHONE
FAX
WEBSITE
Sumida
AVX
(803) 448-9411
(803) 448-1943
www.avxcorp.com
USA: (847) 956-0666 (847) 956-0702
Japan: 81-3-3607-5111 81-3-3607-5144
www.japanlink.com
sumida
Sanyo
Taiyo Yuden
(619) 661-6322
(408) 573-4150
(619) 661-1055
(408) 573-4159
www.sanyovideo.com
www.t-yuden.com
3401fb
9
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| LTC3402 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.2MHz Step-Up DC/DC Converter in SOT-23 |
| LTC3402EMS | 功能描述:IC REG BOOST SYNC ADJ 2A 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LTC3402EMS#PBF | 功能描述:IC REG BOOST SYNC ADJ 2A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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