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| 型号： | LTC3539EDCB#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 2A 8DFN |
| 标准包装： | 500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.5 V ~ 5.25 V |
| 输入电压： | 0.5 V ~ 5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 2A |
| 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： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-DFN（3x2） |
LTC3539/LTC3539-2
APPLICATIONS INFORMATION
Table 1. Representative Inductor s
VENDOR PART/STYLE
Coilcraft MSS5131
(847) 639-6400 LPS4018-222
www.coilcraft.com MSS6132
MOS6020
Murata LQH55D
www.murata.com LQH66S
Sumida CDRH4D22
(847) 956-0666 CDRH4D28C
www.sumida.com CDRH5D28
CDR6D23
TDK VLF5014ST
(847) 803-6100
www.component.tdk.com
Toko D53LC
(408) 432-8282 D63LCB
www.tokoam.com
Würth WE-TPC Type LH, X
(201) 785-8800 WE-PD Type XS
www.we-online.com
Output and Input Capacitor Selection
The internal loop compensation of the LTC3539 is designed
to be stable with output capacitor values of 22μF or greater.
Although ceramic capacitors are recommended, low ESR
(equivalent series resistance) tantalum capacitors may be
used as well.
Low ESR capacitors should be used to minimize the
output voltage ripple. Multilayer ceramic capacitors are
an excellent choice as they have extremely low ESR and
are available in small footprints. A 22μF to 47μF output
capacitor is sufficient for output voltages of 3V or greater.
An output capacitor of up to 100μF is required at lower
output voltages. Even with V OUT greater than 3V, larger
values up to 100μF may be used to obtain extremely low
output voltage ripple and improve transient response. X5R
and X7R dielectric materials are preferred for their ability
to maintain capacitance over wide voltage and temperature
ranges. Y5V types should not be used.
A small ceramic capacitor in parallel with a larger tantalum
capacitor may be used in demanding applications which
have large load transients. A feedforward capacitor across
the top resistor of the feedback divider (from V OUT to FB)
is usually required to improve transient response. A typical
value of 33pF will generally suffice.
Low ESR input capacitors reduce input switching noise
and reduce the peak current drawn from the battery. It
follows that ceramic capacitors are also a good choice
for input decoupling and should be located as close as
possible to the device. A 2.2μF input capacitor is sufficient
for most applications. Larger values may be used without
limitations. Table 2 shows a list of several ceramic capaci-
tor manufacturers. Consult the manufacturers directly for
detailed information on their selection of ceramic parts.
Table 2. Capacitor Vendor Information
SUPPLIER PHONE WEBSITE
AVX (803) 448-9411 www.avxcorp.com
Murata (714) 852-2001 www.murata.com
Taiyo-Yuden (408) 573-4150 www.t-yuden.com
TDK (847) 803-6100 www.component.tdk.com
35392fb
10
For more information www.linear.com/3539/3539-2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3539EDCB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters |
| LTC3541 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Buck + VLDO Regulator |
| LTC3541-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Buck + VLDO Regulator |
| LTC3541-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Buck + VLDO Regulator |
| LTC3541-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Buck + VLDO Regulator |
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