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參數(shù)資料
| 型號： | LM2673S-12 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| 中文描述： | 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封裝： | TO-263, 7 PIN |
| 文件頁數(shù)： | 4/26頁 |
| 文件大?。?/td> | 451K |
| 代理商： | LM2673S-12 |
All Output Voltage Versions
Electrical Characteristics
Limits appearing in
bold type face
apply over the entire junction temperature range of operation, 40C to 125C. Specifica-
tions appearing in normal type apply for T
= T
= 25C. Unless otherwise specified, R
ADJ
= 8.2K
, V
IN
=12V for the 3.3V, 5V
and Adjustable versions and V
IN
=24V for the 12V version.
Symbol
Parameter
Conditions
DEVICE PARAMETERS
I
Q
Quiescent
Current
For 3.3V, 5.0V, and ADJ Versions
V
FEEDBACK
= 15V
For 12V Versions
V
ADJ
Current Limit
Adjust Voltage
I
CL
Current Limit
R
ADJ
= 8.2K
, (Note 5)
I
L
Output Leakage
Current
V
SWITCH
= 0V
V
SWITCH
= 1V
R
DS(ON)
Switch
On-Resistance
f
O
Oscillator
Frequency
D
Duty Cycle
Maximum Duty Cycle
Minimum Duty Cycle
I
BIAS
Feedback Bias
Current
ADJ Version Only
V
SFST
Softstart
Threshold
Voltage
I
SFST
Softstart Pin
Current
θ
JA
Thermal
Resistance
(Note 6)
θ
JA
T Package, Junction to Ambient
(Note 7)
θ
JC
T Package, Junction to Case
θ
JA
S Package, Junction to Ambient
(Note 8)
θ
JA
S Package, Junction to Ambient
(Note 9)
θ
JA
S Package, Junction to Ambient
(Note 10)
θ
JC
S Package, Junction to Case
θ
JA
SD Package, Junction to Ambient
(Note 11)
θ
JA
SD Package, Junction to Ambient
(Note 12)
Typ
Min
Max
Units
V
FEEDBACK
= 8V
4.2
6
mA
1.21
1.181/
1.169
1.229/
1.246
V
4.5
3.8/
3.6
5.25/
5.4
A
V
IN
= 40V, Softstart Pin = 0V
1.0
6
0.15
1.5
15
mA
mA
I
SWITCH
= 3A
0.17/
0.29
Measured at Switch Pin
260
225
280
kHz
91
0
85
%
%
nA
V
FEEDBACK
= 1.3V
0.63
0.53
0.74
V
Softstart Pin = 0V
3.7
6.9
μA
T Package, Junction to Ambient
65
45
2
56
C/W
35
26
2
55
++
C/W
29
L
www.national.com
4
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PDF描述 |
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| LM2673S-3.3 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673S-5.0 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673S-ADJ | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
| LM2673SD-12 | SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2673S12 | 制造商:Texas Instruments 功能描述:IC SWITCHING REG 3A 12V SMD 2673 |
| LM2673S-12/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2673S-3.3 | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2673S-3.3/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT |
| LM2673S5.0 | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 8V to 40V 8-Pin(7+Tab) TO-263 Rail |
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