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参数资料
| 型号： | LTC4244IGN#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 22/28页 |
| 文件大小： | 337K |
| 描述： | IC CTRLR HOTSWAP PCI 20-SSOP |
| 标准包装： | 55 |
| 类型： | 热交换控制器 |
| 应用： | CompactPCI? |
| 内部开关： | 无 |
| 电源电压： | 3.3V，5V，±12V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 管件 |
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22
LTC4244/LTC4244-1
42441f
PCB Layout Considerations
For proper operation of the LTC4244s circuit breaker,
4-wire Kelvin sense connections between the sense resis-
tor and the LTC4244s 5V
IN
and 5V
SENSE
pins and 3.3V
IN
and 3.3V
SENSE
pins are strongly recommended. The PCB
layout should be balanced and symmetrical to minimize
wiring errors. In addition, the PCB layout for the sense
resistors and the power MOSFETs should include good
thermal management techniques for optimal device power
dissipation. A recommended PCB layout for the sense
resistor, the power MOSFET and the GATE drive compo-
nents around the LTC4244 is illustrated in Figure 15. In Hot
APPLICATIO S I FOR ATIO
U
U
U
Swap applications where load currents can be 10A, nar-
row PCB tracks exhibit more resistance than wider tracks
and operate at more elevated temperatures. Since the
sheet resistance of 1 ounce copper foil is approximately
0.45m&/, track resistance and voltage drops add up
quickly in high current applications. Thus, to keep PCB
track resistance, voltage drop and temperature to a mini-
mum, the suggested trace width in these applications for
1 ounce copper foil is 0.03 for each ampere of DC current.
In the majority of applications, it will be necessary to use
plated-through vias to make circuit connections from
component layers to power and ground layers internal to
2
3
4
5
6
7
8
9
LTC4244*
CURRENT FLOW
TO SOURCE
*ADDITIONAL DETAILS OMITTED FOR CLARITY
DRAWING IS NOT TO SCALE!
4244 F15
TRACK WIDTH W:
0.03" PER AMPERE
ON 1 OZ Cu FOIL
D
D
D
D
G
S
S
S
CURRENT FLOW
TO LOAD
CURRENT FLOW
TO LOAD
SENSE
RESISTOR
SO-8
VIA TO
GND PLANE
GND
GND
3.3V
OUT
3.3V
3.3V
IN
3.3V
VIA/PATH
TO GND
GATE
R3
R5
C1
C
TIMER
W
W
W
Figure 15. Recommended Layout for Power MOSFET, Sense Resistor and GATE Components for the 3.3V Rail
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4244IGNTR | 制造商:Linear Technology 功能描述: |
| LTC4245 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Supply Hot Swap Controller for Advanced Mezzanine Card |
| LTC4245CG | 制造商:LINER 制造商全称:Linear Technology 功能描述:Multiple Supply Hot Swap Controller with I2C Compatible Monitoring |
| LTC4245CG#PBF | 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| LTC4245CG#TRPBF | 功能描述:IC CNTRLR HOT SWAP 36-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
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