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| 型号： | TPS51916EVM-746 |
| 厂商： | Texas Instruments |
| 文件页数： | 25/34页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR TPS51916-746 |
| 标准包装： | 1 |
| 系列： | D-Cap™, D-Cap2™ |
| 主要目的： | 特殊用途 DC/DC，DDR 存储器电源 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.2 V ~ 1.5 V |
| 电流 - 输出： | 20A |
| 输入电压： | 8 ~ 20 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 |
| 已用 IC / 零件： | TPS51916 |
| 其它名称： | 296-30054 TPS51916EVM-746-ND |
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TPS51916
SLUSAE1D – DECEMBER 2010 – REVISED JUNE 2012
Layout Considerations
Certain issues must be considered before designing a layout using the TPS51916.
2
VTT
VTTGND
10 m F
3
4
VTT
VTTGND
VLDOIN
TPS51916
V5IN
VIN
VTTREF
12
1 m F
#1
#2
V OUT
0.22 m F
5
19
MODE
11
DRVL
#3
18
TRIP
10
PGND
6
VREF
8
REFIN
7
GND
0.1 m F
10 nF
AGND
UDG-10197
PGND
Figure 41. DC/DC Converter Ground System
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VIN capacitor(s), VOUT capacitor(s) and MOSFETs are the power components and should be placed on one
side of the PCB (solder side). Other small signal components should be placed on another side (component
side). At least one inner system GND plane should be inserted, in order to shield and isolate the small signal
traces from noisy power lines.
All sensitive analog traces and components such as VDDQSNS, VTTSNS, MODE, REFIN, VREF and TRIP
should be placed away from high-voltage switching nodes such as SW, DRVL, DRVH or VBST to avoid
coupling. Use internal layer(s) as system GND plane(s) and shield feedback trace from power traces and
components.
The DC/DC converter has several high-current loops. The area of these loops should be minimized in order to
suppress generating switching noise.
– The most important loop to minimize the area of is the path from the VIN capacitor(s) through the high and
low-side MOSFETs, and back to the negative node of the VIN capacitor(s). Connect the negative node of
the VIN capacitor(s) and the source of the low-side MOSFET as close as possible. (Refer to loop #1 of
– The second important loop is the path from the low-side MOSFET through inductor and VOUT
capacitor(s), and back to source of the low-side MOSFET. Connect the source of the low-side MOSFET
– The third important loop is of gate driving system for the low-side MOSFET. To turn on the low-side
MOSFET, high current flows from V5IN capacitor through gate driver and the low-side MOSFET, and back
to negative node of the capacitor. To turn off the low-side MOSFET, high current flows from gate of the
low-side MOSFET through the gate driver and PGND pin, and back to source of the low-side MOSFET.
Connect negative node of V5IN capacitor, source of the low-side MOSFET and PGND pin as close as
Connect negative nodes of the VTTREF output capacitor, VREF capacitor and REFIN capacitor and bottom-
side resistance of VREF voltage-divider to GND pin as close as possible. The negative node of the VTT
Copyright ? 2010–2012, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS51916EVM-746 | 制造商:Texas Instruments 功能描述:TPS51916, DC/DC CONVERTER, STEP DOWN, EV |
| TPS51916RUK | 制造商:TI 制造商全称:Texas Instruments 功能描述:Using the TPS51916EVM-746 Complete DDR2, DDR3 |
| TPS51916RUKR | 功能描述:直流/直流开关调节器 DDR2,DDR3 & DDR3L BUCK CONTROLLER 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 |
| TPS51916RUKT | 功能描述:直流/直流开关调节器 DDR2,DDR3 & DDR3L BUCK CONTROLLER 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 |
| TPS51980RTVR | 制造商:Texas Instruments 功能描述:DUAL PWM,99% MAX |
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