收藏本站
NCP3125
3.3 V
Output
Voltage
Output
Current
tss
Figure 28. Resistive Load Current
Layout Considerations
As in any high frequency switching regulator, layout is
very important. Switching current from one power device to
another can generate voltage transients across the
impedances of the interconnecting bond wires and circuit
traces. The interconnecting impedances should be
minimized by using wide short printed circuit traces. The
critical components should be located as close together as
possible using ground plane construction or single point
grounding. For optimal performance, the NCP3125 should
have a layout similar to the one shown in Figure 30. An
important note is that the input voltage to the NCP3125
should have local decoupling to PGND. The recommended
decoupling for input voltage is a 1 m F general purpose
ceramic capacitor and a 0.01 m F COG ceramic capacitor
placed in parallel.
Alternatively, if the output has an under voltage lockout,
turns on at a defined voltage level, and draws a consistent
current, then the RMS connected load current is:
PGND
Top
I CLI +
V OUT * V OUT_TO
V OUT
I OUT
(eq. 51)
BST
AGND
CP
CC
RC
798 mA +
3.3 V * 1.2 V
3.3 V
1A
VIN
ISET
VSW
COMP
FB
PGND
RF
R1
CF
I OUT
V OUT
V OUT_TO
= Output current
= Output voltage
= Output voltage load turn on
3.3 V
1.0 V
COG
0.01 uF
1 .0 uF
R2
AGND
PGND
Output
Voltage
CC
RC
CF
CP
RF
R2
R1
AGND
COMP
FB
PGND
COG
0.01 uF
BST
VIN
ISET
VSW
Output
Current
tss
t
AGND
Single Point
1 .0 uF
Bottom
Figure 29. Voltage Enable Load Current
If the inrush current is higher than the steady state input
current during max load, then an input fuse should be rated
accordingly using I 2 t methodology.
Grounding
Figure 30. Recommended Layout
The typical applications are shown in Figures 31 and 32
for output electrolytic and ceramic bulk capacitors,
respectively.
http://onsemi.com
20
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
A9AAT-1304F FLEX CABLE - AFE13T/AF13/AFE13T
MAX6006BESA+ IC VREF SHUNT PREC 1.25V 8-SOIC
A9CAA-0802E FLEX CABLE - AFK08A/AE08/AFH08T
A9AAT-2203E FLEX CABLE - AFH22T/AE22/AFH22T
RE-1512S/H CONV DC/DC 1W 15VIN 12VOUT
NCP3127AGEVB BOARD EVALUATION NCP3127
A9CAG-0603F FLEX CABLE - AFG06G/AF06/AFE06T
A9BBG-0204F FLEX CABLE - AFF02G/AF02/AFF02G
相关代理商/技术参数
NCP3125CRAGEVB 功能描述:电源管理IC开发工具 NCP3125 Ceramic Eval Board RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
NCP3126ADR2G 功能描述:直流/直流开关转换器 3A PWM Switching Buck Regulator 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
NCP3126AGEVB 功能描述:电源管理IC开发工具 NCP3126 EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
NCP3126CRAGEVB 功能描述:电源管理IC开发工具 NCP3126 CERAMIC EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
NCP3127ADR2G 功能描述:直流/直流开关转换器 2A PWM Switching Buck Regulator 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
NCP3127AGEVB 功能描述:电源管理IC开发工具 NCP3127 EVALUATION BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
NCP3127CRAGEVB 功能描述:电源管理IC开发工具 NCP3127 CERAMIC EVB RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
NCP3155ADR2G 功能描述:直流/直流开关调节器 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