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| 型号： | LTC3616IUDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 6A 24QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 300kHz ~ 4MHz |
| 电流 - 输出： | 6A |
| 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： | 24-QFN |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 24-QFN（3x5） |
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LTC3616
APPLICATIONS INFORMATION
Ferrite designs have very low core losses and are pre-
ferred at high switching frequencies, so design goals
can concentrate on copper loss and preventing satura-
tion. Ferrite core material saturates “hard,” meaning
that inductance collapses abruptly when the peak design
current is exceeded. This results in an abrupt increase in
inductor ripple current and consequently output voltage
ripple. Do not allow a ferrite core to saturate and select
external inductors respecting the temperature range of
the application!
Table 1. Representative Surface Mount Inductors
INDUCTANCE DCR MAX DIMENSIONS
(μH) (mΩ) CURRENT (A) (mm)
Vishay IHLP-2525CZ-01
0.10 1.5 60 6.5 × 6.9
0.15 1.9 52 6.5 × 6.9
0.20 2.4 41 6.5 × 6.9
0.22 2.5 40 6.5 × 6.9
0.33 3.5 30 6.5 × 6.9
0.47 4 26 6.5 × 6.9
HEIGHT
(mm)
3
3
3
3
3
3
Different core materials and shapes will change the size/
current and price/current relationship of an inductor. Toroid
or shielded pot cores in ferrite or permalloy materials are
small and don’t radiate much energy, but generally cost
more than powdered iron core inductors with similar
characteristics. The choice of which style inductor to use
mainly depends on the price versus size requirements
and any radiated field/EMI requirements. Table 1 shows
some typical surface mount inductors that work well in
LTC3616 applications.
Sumida CDMC6D28 Series
0.2 2.5 21.7
0.3 3.2 15.4
0.47 4.2 13.6
Cooper HCP0703 Series
0.22 2.8 23
0.47 4.2 17
0.68 5.5 15
Würth Electronik WE-HC744312 Series
0.25 2.5 18
7.25 × 4.4
7.25 × 4.4
7.25 × 4.4
7 × 7.3
7 × 7.3
7 × 7.3
7 × 7.7
3
3
3
3.0
3.0
3.0
3.8
Input Capacitor (C IN ) Selection
0.47 3.4
Coilcraft SLC7530 Series
16
7 × 7.7
3.8
In continuous mode, the source current of the top P-
channel MOSFET is a square wave of duty cycle V OUT /V IN .
To prevent large voltage transients, a low ESR capacitor
sized for the maximum RMS current must be used at V IN .
The maximum RMS capacitor current is given by:
0.100
0.188
0.272
0.350
0.400
0.123
0.100
0.100
0.100
0.100
20
21
14
11
8
7.5 × 6.7
7.5 × 6.7
7.5 × 6.7
7.5 × 6.7
7.5 × 6.7
3
3
3
3
3
? ? IN – 1 ?
I RMS = I OUT(MAX) ?
V OUT
V IN
? V ?
? V OUT ?
This formula has a maximum at V IN = 2V OUT , where I RMS =
I OUT /2. This simple worst-case condition is commonly used
for design because even significant deviations do not offer
much relief. Note that ripple current ratings from capacitor
manufacturers are often based on only 2000 hours of life
which makes it advisable to further derate the capacitor,
or choose a capacitor rated at a higher temperature than
required. Generally select the capacitors respecting the
temperature range of the application! Several capacitors
may also be paralleled to meet size or height requirements
in the design.
15
For more information www.linear.com/LTC3616
3616fb
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| LTC3617EUDD#PBF | 功能描述:IC REG SYNC 6A BUCK 24-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:2,000 系列:- 应用:控制器，DSP 输入电压:4.5 V ~ 25 V 输出数:2 输出电压:最低可调至 1.2V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:30-TFSOP（0.173"，4.40mm 宽） 供应商设备封装:30-TSSOP 包装:带卷 (TR) |
| LTC3617EUDD#TRPBF | 功能描述:IC REG SYNC 6A BUCK 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3617IUDD#PBF | 功能描述:IC REG SYNC 6A BUCK 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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