參數資料
型號： LM2595
廠商： National Semiconductor Corporation
英文描述： Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85
中文描述： SIMPLE SWITCHER系列電源轉換器150千赫1A步降穩(wěn)壓器
文件頁數： 11/29頁
文件大?。?/td> 935K
代理商： LM2595
LM2595 Series Buck Regulator Design Procedure (Fixed Output)
(Continued)
LM2595 Series Buck Regulator Design Procedure (Adjustable Output)
PROCEDURE (Adjustable Output Voltage Version)
EXAMPLE (Adjustable Output Voltage Version)
Given:
V
OUT
= Regulated Output Voltage
V
IN
(max) = Maximum Input Voltage
I
LOAD
(max) = Maximum Load Current
F = Switching Frequency (Fixed at a nominal 150 kHz).
Given:
V
OUT
= 20V
V
IN
(max) = 28V
I
LOAD
(max) = 1A
F = Switching Frequency (Fixed at a nominal 150 kHz).
1. Programming Output Voltage
(Selecting R
1
and R
2
, as
shown in Figure 1)
Use the following formula to select the appropriate resistor
values.
Select a value for R
between 240
and 1.5 k
. The lower
resistor values minimize noise pickup in the sensitive feed-
back pin. (For the lowest temperature coefficient and the best
stability with time, use 1% metal film resistors.)
1. Programming Output Voltage (Selecting R
1
and R
2
, as
shown in
Figure 1
)
Select R
1
to be 1 k
, 1%. Solve for R
2
.
R
2
= 1k (16.26 1) = 15.26k, closest 1% value is 15.4 k
.
R
2
= 15.4 k
.
Procedure continued on next page.
Example continued on next page.
Conditions
Inductor
Output Capacitor
Through Hole Electrolytic
Panasonic
HFQ Series
(μF/V)
330/16
270/25
220/25
180/35
220/25
150/35
150/35
330/16
220/25
180/35
180/35
180/16
120/25
100/25
220/25
180/35
82/25
82/25
180/25
82/25
56/25
Surface Mount Tantalum
AVX TPS
Series
(μF/V)
220/10
220/10
220/10
220/10
220/10
100/16
100/16
220/10
220/10
220/10
100/16
220/10
100/16
68/20
68/20
68/20
68/20
68/20
68/20
68/20
68/20
Output
Voltage
(V)
Load
Current
(A)
Max Input
Voltage
(V)
5
7
10
40
6
10
40
8
10
15
40
9
20
40
15
18
30
40
15
20
40
Inductance
(μH)
Inductor
(
#
)
Nichicon
PL Series
(μF/V)
330/16
270/25
220/35
220/35
220/16
150/25
82/35
330/16
220/25
180/35
120/35
180/16
1200/25
100/25
220/25
120/25
82/25
82/25
180/25
82/25
56/25
Sprague
595D Series
(μF/V)
330/10
270/10
220/10
180/10
220/10
150/16
100/20
270/10
220/10
150/16
120/16
150/16
100/20
68/25
120/20
120/20
100/20
68/25
120/20
100/20
68/25
3.3
1
22
33
47
68
47
68
100
33
47
68
100
68
150
150
47
68
150
220
68
150
330
L24
L23
L31
L30
L13
L21
L20
L28
L31
L30
L29
L21
L19
L19
L31
L30
L36
L35
L21
L19
L26
0.5
5
1
0.5
12
1
0.5
FIGURE 2. LM2595 Fixed Voltage Quick Design Component Selection Table
www.national.com
11
相關PDF資料
PDF描述
LM2596R 3.0A, 150Khz, Step-Down Switching Regulator
LM2597N-12 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
LM2597HVN-12 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
LM2597HVN-3.3 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
LM2597HVN-5.0 SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features
相關代理商/技術參數
參數描述
LM2595ADPBCKGEVB 功能描述:電源管理IC開發(fā)工具 LM2595ADJ D2PAK BUCK DB RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM2595ATPBCKGEVB 功能描述:電源管理IC開發(fā)工具 LM2595ADJ TO220 BUCK DB RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM2595DSADJG 功能描述:直流/直流開關調節(jié)器 1A BUCK SW REG 150KHZ RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM2595DSADJR4G 功能描述:直流/直流開關調節(jié)器 1A BUCK SW REG 150KHZ RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體: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
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*