参数资料
| 型号： | LT1618EMS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1.5A 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： | 1.26 V ~ 36 V |
| 输入电压： | 1.6 V ~ 18 V |
| PWM 型： | 电流/电压模式 |
| 频率 - 开关： | 1.4MHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 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 |
LT1618
APPLICATIO N S I N FOR M ATIO N
Inductor Selection
Several inductors that work well with the LT1618 are listed
in Table 1, although there are many other manufacturers
and devices that can be used. Consult each manufacturer
for more detailed information and for their entire selection
of related parts. Many different sizes and shapes are
available. Ferrite core inductors should be used to obtain
the best efficiency, as core losses at 1.4MHz are much
lower for ferrite cores than for the cheaper powdered-iron
ones. Choose an inductor that can handle the necessary
peak current without saturating, and ensure that the
inductor has a low DCR (copper-wire resistance) to mini-
mize I 2 R power losses. A 4.7 μ H or 10 μ H inductor will be
a good choice for many LT1618 designs.
Table 1. Recommended Inductors
the same footprint device. Always use a capacitor with a
sufficient voltage rating.
Ceramic capacitors also make a good choice for the input
decoupling capacitor, which should be placed as close as
possible to the V IN pin of the LT1618. A 1 μ F to 4.7 μ F input
capacitor is sufficient for most applications. Table 2 shows
a list of several ceramic capacitor manufacturers. Consult
the manufacturers for detailed information on their entire
selection of ceramic parts.
Table 2. Recommended Ceramic Capacitor Manufacturers
VENDOR PHONE URL
Taiyo Yuden (408) 573-4150 www.t-yuden.com
Murata (814) 237-1431 www.murata.com
Kemet (408) 986-0424 www.kemet.com
L MAX
PART ( μ H) (m ? )
HEIGHT
(mm)
VENDOR
Diode Selection
CDRH5D18-4R1
CDRH5D18-100
CR43-2R2
CR43-4R7
CR43-100
CR54-100
LQH3C1R0M24
LQH3C2R2M24
LQH3C4R7M24
4.1
10
2.2
4.7
10
10
1.0
2.2
4.7
57
124
71
109
182
100
78
126
260
2.0
2.0
3.5
3.5
3.5
4.8
2.0
2.0
2.0
Sumida
(847) 956-0666
www.sumida.com
Murata
(814) 237-1431
www.murata.com
Schottky diodes, with their low forward voltage drop and
fast switching speed, are the ideal choice for LT1618
applications. Table 3 shows several Schottky diodes that
work well with the LT1618. Many different manufacturers
make equivalent parts, but make sure that the component
chosen has a sufficient current rating and a voltage rating
greater than the output voltage. The diode conducts cur-
rent only when the power switch is turned off (typically
less than half the time), so a 0.5A or 1A diode will be
Capacitor Selection
Low ESR (equivalent series resistance) capacitors should
be used at the output to minimize the output ripple voltage.
Multilayer ceramic capacitors are an excellent choice.
sufficient for most designs. The companies below also
offer Schottky diodes with higher voltage and current
ratings.
Table 3. Recommended Schottky Diodes
They have an extremely low ESR and are available in very
small packages. X5R and X7R dielectrics are preferred, as
1A PART
UPS120
0.5A PART
VENDOR
Microsemi
PHONE/URL
(510) 353-0822
these materials retain their capacitance over wider voltage
and temperature ranges than other dielectrics. A 4.7 μ F to
10 μ F output capacitor is sufficient for high output current
designs. Converters with lower output currents may need
UPS130
UPS140
MBRM120 MBR0520
MBRM130 MBR0530
MBRM140 MBR0540
www.microsemi.com
ON Semiconductor (800) 282-9855
www.onsemi.com
only a 1 μ F or 2.2 μ F output capacitor. Solid tantalum or
OSCON capacitors can be used, but they will occupy more
board area than a ceramic and will have a higher ESR for
B120
B130
B140
B0520
B0530
B0540
Diodes, Inc
(805) 446-4800
www.diodes.com
sn1618 1618fas
6
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| LT1619 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller |
| LT1619EMS8 | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT1619EMS8#PBF | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LT1619EMS8#TR | 功能描述:IC REG CTRLR PWM CM 8-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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