Datasheet > LM2576D2T-15

LM2576D2T-15

更新时间： 2024-02-10 13:03:46

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		稳压器
页数	文件大小	规格书
27页	423K
描述
EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGULATOR

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LM2576D2T-15 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	D2PAK
包装说明：	, SMSIP5H,.6,67TB	针数：	5
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.27
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	VOLTAGE-MODE
控制技术：	PULSE WIDTH MODULATION	最大输入电压：	40 V
最小输入电压：	18 V	标称输入电压：	30 V
JESD-30 代码：	R-PSSO-G5	JESD-609代码：	e3
长度：	10.02 mm	湿度敏感等级：	1
功能数量：	1	端子数量：	5
最高工作温度：	125 °C	最低工作温度：	-40 °C
最大输出电流：	7.5 A	封装主体材料：	PLASTIC/EPOXY
封装等效代码：	SMSIP5H,.6,67TB	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	4.826 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	BUCK	最大切换频率：	63 kHz
技术：	BIPOLAR	温度等级：	AUTOMOTIVE
端子面层：	Tin (Sn)	端子形式：	GULL WING
端子节距：	1.702 mm	端子位置：	SINGLE
处于峰值回流温度下的最长时间：	40	宽度：	9.1945 mm
Base Number Matches：	1

LM2576D2T-15 数据手册

LM2576

Procedure (Fixed Output Voltage Version) In order to simplify the switching regulator design, a step–by–step

design procedure and some examples are provided.

Procedure

Example

Given Parameters:

= Regulated Output Voltage (3.3 V, 5.0 V, 12 V or 15 V)

Given Parameters:

= 5.0 V

out

= Maximum Input Voltage

= Maximum Load Current

= 15 V

= 3.0 A

in(max)

Load(max)

1. Controller IC Selection

According to the required input voltage, output voltage and

current, select the appropriate type of the controller IC output

voltage version.

According to the required input voltage, output voltage, current

polarity and current value, use the LM2576–5 controller IC

2. Input Capacitor Selection (C

)

2. Input Capacitor Selection (C )

To prevent large voltage transients from appearing at the input

and for stable operation of the converter, an aluminium or

tantalum electrolytic bypass capacitor is needed between the

A 100 µF, 25 V aluminium electrolytic capacitor located near to

the input and ground pins provides sufficient bypassing.

input pin +V and ground pin Gnd. This capacitor should be

located close to the IC using short leads. This capacitor should

have a low ESR (Equivalent Series Resistance) value.

3. Catch Diode Selection (D1)

A. Since the diode maximum peak current exceeds the

regulator maximum load current the catch diode current

rating must be at least 1.2 times greater than the maximum

load current. For a robust design the diode should have a

current rating equal to the maximum current limit of the

LM2576 to be able to withstand a continuous output short

B. The reverse voltage rating of the diode should be at least

1.25 times the maximum input voltage.

A. For this example the current rating of the diode is 3.0 A.

B. Use a 20 V 1N5820 Schottky diode, or any of the suggested

fast recovery diodes shown in Table 1.

4. Inductor Selection (L1)

A. According to the required working conditions, select the

correct inductor value using the selection guide from

Figures 18 to 22.

A. Use the inductor selection guide shown in Figures 19.

B. From the appropriate inductor selection guide, identify the

inductance region intersected by the Maximum Input

Voltage line and the Maximum Load Current line. Each

region is identified by an inductance value and an inductor

code.

B. From the selection guide, the inductance area intersected

by the 15 V line and 3.0 A line is L100.

C. Select an appropriate inductor from the several different

manufacturers part numbers listed in Table 2.

The designer must realize that the inductor current rating

must be higher than the maximum peak current flowing

through the inductor. This maximum peak current can be

calculated as follows:

C. Inductor value required is 100 µH. From Table 2, choose

an inductor from any of the listed manufacturers.

–V

out

Load(max)

p(max)

where t is the “on” time of the power switch and

out

1.0

osc

For additional information about the inductor, see the

inductor section in the “Application Hints” section of

this data sheet.

MOTOROLA ANALOG IC DEVICE DATA

1...7 8 91011 12 13...27

中文翻译

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与LM2576D2T-15相关器件

型号	品牌	描述	获取价格	数据表
LM2576D2T-15G	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2T3.3	MOTOROLA	Switching Regulator/Controller, Voltage-mode, 3A, 63kHz Switching Freq-Max, BIPolar	获取价格
LM2576D2T-3.3	ONSEMI	EASY SWITCHER 3.0 A STEP.DOWN VOLTAGE REGULATOR	获取价格
LM2576D2T-3.3	MOTOROLA	EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGUL	获取价格
LM2576D2T-3.3G	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2T5	MOTOROLA	Switching Regulator/Controller, Voltage-mode, 3A, 63kHz Switching Freq-Max, BIPolar	获取价格
LM2576D2T-5	ONSEMI	EASY SWITCHER 3.0 A STEP.DOWN VOLTAGE REGULATOR	获取价格
LM2576D2T-5	MOTOROLA	EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGUL	获取价格
LM2576D2T-ADJ	ONSEMI	EASY SWITCHER 3.0 A STEP.DOWN VOLTAGE REGULATOR	获取价格
LM2576D2T-ADJ	MOTOROLA	EASY SWITCHERE⑩ 3.0 A STEP-DOWN VOLTAGE REGUL	获取价格
LM2576D2T-ADJG	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2T-ADJR4	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2T-ADJR4G	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2TR4-005	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2TR4-005G	ONSEMI	暂无描述	获取价格
LM2576D2TR4-012	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2TR4-012G	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2TR4-3.3	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2TR4-3.3G	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格
LM2576D2TR4-5G	ONSEMI	3.0 A, 15 V, Step−Down Switching Regulator	获取价格

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