Datasheet > C2012X7R1C105K

C2012X7R1C105K

更新时间： 2024-02-15 17:25:08

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
12页	1365K
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LMZ1050xEXT Evaluation Board

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C2012X7R1C105K 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Not Recommended	包装说明：	, 0805
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8532.24.00.20	风险等级：	5.31
电容：	1 µF	电容器类型：	CERAMIC CAPACITOR
介电材料：	CERAMIC	高度：	1.45 mm
JESD-609代码：	e3	长度：	2 mm
安装特点：	SURFACE MOUNT	多层：	Yes
负容差：	10%	端子数量：	2
最高工作温度：	125 °C	最低工作温度：	-55 °C
封装形状：	RECTANGULAR PACKAGE	封装形式：	SMT
包装方法：	TR	正容差：	10%
额定（直流）电压（URdc）：	16 V	尺寸代码：	0805
表面贴装：	YES	温度特性代码：	X7R
温度系数：	15% ppm/ °C	端子面层：	Matte Tin (Sn) - with Nickel (Ni) barrier
端子形状：	WRAPAROUND	宽度：	1.25 mm
Base Number Matches：	1

C2012X7R1C105K 数据手册

National Semiconductor

Application Note 2074

Yang Zhang

LMZ1050xEXT Evaluation

Board

August 16, 2010

Introduction

Evaluation Board Design Concept

The LMZ1050xEXT SIMPLE SWITCHER® power module is

a complete, easy-to-use DC-DC solution capable of driving

up to 3A, 4A, or 5A load with exceptional power conversion

efficiency, output voltage accuracy, line and load regulation.

The LMZ1050xEXT is available in an innovative package that

enhances thermal performance and allows for hand or ma-

chine soldering.

The evaluation board is designed to demonstrate low con-

ducted noise on the input and output lines, as seen in Figure

11 and Figure 14. Four input capacitors (C_in1- C _in4) and three

output capacitors (C_o1- C_o3) are populated for this purpose.

All the input and output filter capacitors are not necessary to

comply with radiation standards. For a circuit example that

passes radiated emissions standards (EN55022, class B)

please refer to Figure 19. Additionally, C_in5is present to re-

duce the resonance of the input line produced by the induc-

tance and resistance in the cables connecting the bench

power supply to the evaluation board and the input capacitors.

The LMZ1050xEXT can accept an input voltage rail between

2.95V and 5.5V and deliver an adjustable and highly accurate

output voltage as low as 0.8V. One megahertz fixed frequen-

cy PWM switching provides a predictable EMI characteristic.

Two external compensation components can be adjusted to

set the fastest response time, while allowing the option to use

ceramic and/or electrolytic output capacitors. Externally pro-

grammable soft-start capacitor facilitates controlled startup.

The LMZ1050xEXT is a reliable and robust solution with the

following features: lossless cycle-by-cycle peak current limit

to protect for over current or short-circuit fault, thermal shut-

down, input under-voltage lock-out, and pre-biased startup.

Additional Component Footprints

When the tracking feature of the LMZ1050xEXT is used, re-

move the soft-start capacitor C_SSand use a resistor divider

on designators R_trkband R_trkt. The ground and V_trkpost have

been provided for easy connection.

The LMZ1050xEXT eval board incorporates a precision en-

able circuit which is pulled high by a 100 kΩ pull up resistor

to VIN. This allows the user to pull low on the enable pin to

ground. The top enable resistor is R_entand the bottom enable

resistor is R_enb. Refer to the Design Guideline and Operating

Description section of the LMZ1050xEXT data sheet for de-

tailed design implementation.

Board Specifications

•

V_IN= 2.95V to 5.5V

V_OUT= 2.5V (default output voltage setting, refer to Table

2 for other output settings)

Select FPGAs specify input inrush currents for particular pow-

er-up sequences and others require sequencing rails to avoid

start-up or latch-up problems. To prevent early turn-on of the

LMZ1050xEXT in systems with multiple power rails, precision

enable and tracking are useful as the main input voltage rail

rises at power-up.

•

±2.5% feedback voltage accuracy at 2.5V output

(Including line and load regulation from T_J= -55°C to

125°C)

±1.63% feedback voltage accuracy over temperature

I_OUT= 0A to 3A, 4A, and 5A

•

_JA= 20°C/W, θ_JC= 1.9°C/W

Designed on four layers, the top and bottom layers are

1oz. copper and the two inner layers are 1/2 oz. copper

weight

•

Measures 2.25 in. x 2.25 in. (5.8 cm x 5.8 cm) and is 62mil

(.062”) thick on a FR4 laminate

301280

www.national.com

12 3 4 5 6 7...12

中文翻译

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与C2012X7R1C105K相关器件

型号	品牌	获取价格	描述	数据表
C2012X7R1C105K/0.85	TDK	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 16V, 10% -Tol, X7R, 15% TC, 1uF, Surface Mount, 08
C2012X7R1C105K/1.25	TDK	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 16V, 10% -Tol, X7R, 15% TC, 1uF, Surface Mount, 08
C2012X7R1C105K085AA	TDK	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 16V, 10% +Tol, 10% -Tol, X7R, 15% TC, 1uF, Surface
C2012X7R1C105K085AC	TDK	获取价格	CAP CER 1UF 16V X7R 0805
C2012X7R1C105K125AA	TDK	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 16V, 10% +Tol, 10% -Tol, X7R, 15% TC, 1uF, Surface
C2012X7R1C105K125AA_17	TDK	获取价格	Multilayer Ceramic Chip Capacitors
C2012X7R1C105KB	TDK	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 16V, 10% +Tol, 10% -Tol, X7R, 15% TC, 1uF, Surface
C2012X7R1C105KT	TDK	获取价格	Ceramic Capacitor, Multilayer, Ceramic, 16V, 10% +Tol, 10% -Tol, X7R, 15% TC, 1uF, Surface
C2012X7R1C105M	TDK	获取价格	Ceramic Capacitors For General Use SMD
C2012X7R1C105M085AC	TDK	获取价格	CAP CER 1UF 16V X7R 0805

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