- 您现在的位置：买卖IC网 > PDF目录17403 > LM3102EVAL/NOPB (National Semiconductor)EVAL BOARD FOR LM3102 PDF资料下载
参数资料
| 型号： | LM3102EVAL/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 17/24页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR LM3102 |
| 标准包装： | 1 |
| 系列： | PowerWise®, SIMPLE SWITCHER® |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.3V |
| 电流 - 输出： | 2.5A |
| 输入电压： | 8 ~ 42 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板，文档 |
| 已用 IC / 零件： | LM3102 |
SNVS515G – SEPTEMBER 2007 – REVISED JANUARY 2012
PC BOARD LAYOUT
The LM3102 regulation, over-voltage, and current limit comparators are very fast so they will respond to short
duration noise pulses. Layout is therefore critical for optimum performance. It must be as neat and compact as
possible, and all external components must be as close to their associated pins of the LM3102 as possible. Refer
to the functional block diagram, the loop formed by C IN , the main and synchronous MOSFET internal to the
LM3102, and the PGND pin should be as small as possible. The connection from the PGND pin to C IN should be
as short and direct as possible. Vias should be added to connect the ground of C IN to a ground plane, located as
close to the capacitor as possible. The bootstrap capacitor C BST should be connected as close to the SW and
BST pins as possible, and the connecting traces should be thick. The feedback resistors and capacitor R FB1 ,
R FB2 , and C FB should be close to the FB pin. A long trace running from V OUT to R FB1 is generally acceptable
since this is a low impedance node. Ground R FB2 directly to the AGND pin (pin 7). The output capacitor C OUT
should be connected close to the load and tied directly to the ground plane. The inductor L should be connected
close to the SW pin with as short a trace as possible to reduce the potential for EMI (electromagnetic
interference) generation. If it is expected that the internal dissipation of the LM3102 will produce excessive
junction temperature during normal operation, making good use of the PC board’s ground plane can help
considerably to dissipate heat. The exposed pad on the bottom of the LM3102 IC package can be soldered to
the ground plane, which should extend out from beneath the LM3102 to help dissipate heat. The exposed pad is
internally connected to the LM3102 IC substrate. Additionally the use of thick traces, where possible, can help
conduct heat away from the LM3102. Using numerous vias to connect the die attached pad to the ground plane
is a good practice. Judicious positioning of the PC board within the end product, along with the use of any
available air flow (forced or natural convection) can help reduce the junction temperature.
Figure 30. Typical Application Schematic for V OUT = 3.3V
Figure 31. Typical Application Schematic for V OUT = 0.8V
Copyright ? 2007–2012, Texas Instruments Incorporated
Product Folder Links: LM3102
17
相关PDF资料 |
PDF描述 |
|---|---|
| TH3D156M020D0900 | CAP TANT 15UF 20V 20% 2917 |
| GCC13DRTF-S13 | CONN EDGECARD 26POS .100 EXTEND |
| LM4040D25IDBZT | IC VREF SHUNT PREC 2.5V SOT-23-3 |
| S5MHE3/9AT | DIODE GPP 5A 1000V SMC DO-214AB |
| IPS6011RTRRPBF | IC SWITCH IPS 1CH HI SIDE DPAK-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM3102MH | 制造商:Texas Instruments 功能描述:IC, V REG, SYNCH, 2.5A, POWERWISE |
| LM3102MH/NOPB | 功能描述:直流/直流开关调节器 SYNC 1MHZ 2.5A STEP- DOWN VLTG REG RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM3102MHX | 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 4.5V to 42V 20-Pin TSSOP EP T/R |
| LM3102MHX/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM3102QMH/NOPB | 功能描述:直流/直流开关调节器 SIMPLE SWITCHER Sync 1MHz 2.5A SD Vtg Reg RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。