LM2595ADPBCKGEVB【PDF 9/25 页】EVAL BOARD FOR LM2595ADPBCKG

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录17351

5页 6页 7页 8页 [9页]10页 11页 12页 13页

LM2595

PROCEDURE (ADJUSTABLE OUTPUT VERSION: LM2595)

Procedure

Given Parameters:

V out = Regulated Output Voltage

V in(max) = Maximum DC Input Voltage

I Load(max) = Maximum Load Current

1. Programming Output Voltage

To select the right programming resistor R1 and R2 value (see

Example

Given Parameters:

V out = 5.0 V

V in(max) = 12 V

I Load(max) = 1.0 A

1. Programming Output Voltage (selecting R1 and R2)

Select R1 and R2:

1.0 )

V out + V

where V ref = 1.23 V

V out + 1.23 1.0 )

V out

R2 + R1 * 1.0

ref

+ * 1.0

Figure 1) use the following formula:

ref R1

Resistor R1 can be between 1.0 k and 5.0 k W . (For best

temperature coefficient and stability with time, use 1% metal

Select R1 = 1.0 k W

1.23 V

film resistors).

R2 + R1

V out

V ref

* 1.0

R2 = 3.07 k W , choose a 3.0k metal film resistor.

2. Input Capacitor Selection (C in )

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

input pin +V in 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 .

For additional information see input capacitor section in the

“Application Information” section of this data sheet.

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

2. Input Capacitor Selection (C in )

A 220 m F, 50 V aluminium electrolytic capacitor located near

the input and ground pin provides sufficient bypassing.

3. Catch Diode Selection (D1)

A. For this example, a 1.0 A (for a robust design 3.0 A diode

is recommended) current rating is

adequate.

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

current rating equal to the maximum current limit of the

LM2595 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.

B. For V in = 12 V use a 20 V 1N5817 (1N5820) Schottky

diode or any suggested fast recovery diode in the Table 2.

http://onsemi.com

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)

*型号	*数量	厂商	批号	封装

添加更多采购

我的联系方式

相关代理商/技术参数

LM2595ATPBCKGEVB 功能描述:电源管理IC开发工具 LM2595ADJ TO220 BUCK DB 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

LM2595DSADJG 功能描述:直流/直流开关调节器 1A BUCK SW REG 150KHZ 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

LM2595DSADJR4G 功能描述:直流/直流开关调节器 1A BUCK SW REG 150KHZ 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

LM2595S12 制造商:Texas Instruments 功能描述:SWITCHING REG, 1A 12V, SMD, 2595 制造商:Texas Instruments 功能描述:SWITCHING REG, 1A 12V, SMD, 2595; Primary Input Voltage:24V; No. of Outputs:1; Output Voltage:12V; Output Current:1A; Voltage Regulator Case Style:TO-263; No. of Pins:5; Operating Temperature Min:-25C; Operating Temperature ;RoHS Compliant: Yes

LM2595S-12 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

LM2595S12 制造商:Texas Instruments 功能描述:IC SWITCHING REG 1A 12V SMD 2595

LM2595S-12/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

LM2595S-3.3 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

我
采购
搜索
会员

采购需求

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

我的联系方式