參數(shù)資料
型號(hào)： LM2595J-12-QML(5962-96502
廠商： National Semiconductor Corporation
英文描述： SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
中文描述： SIMPLE SWITCHER系列電源轉(zhuǎn)換器150千赫1A步降穩(wěn)壓器
文件頁數(shù)： 11/29頁
文件大?。?/td> 935K
代理商： LM2595J-12-QML(5962-96502
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)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/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM2595S-3.3 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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