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參數(shù)資料
| 型號： | LM2674LDX-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down Voltage Regulator |
| 中文描述： | 1.25 A SWITCHING REGULATOR, 275 kHz SWITCHING FREQ-MAX, DSO16 |
| 封裝： | LLP-16 |
| 文件頁數(shù)： | 4/26頁 |
| 文件大小： | 947K |
| 代理商： | LM2674LDX-5.0 |
LM2674-ADJ
(Continued)
Symbol
Parameter
Conditions
Typ
Min
Max
(Note 5)
Units
(Note 4)
90
(Note 5)
η
Efficiency
V
IN
= 12V, I
LOAD
= 500 mA
%
All Output Voltage Versions
Specifications with standard type face are for T
= 25C, and those with
bold type face
apply over
full Operating Tempera-
ture Range
. Unless otherwise specified, V
IN
= 12V for the 3.3V, 5V, and Adjustable versions and V
IN
= 24V for the 12V ver-
sion, and I
LOAD
= 100 mA.
Symbol
Parameters
Conditions
DEVICE PARAMETERS
I
Q
Quiescent Current
V
FEEDBACK
= 8V
For 3.3V, 5.0V, and ADJ Versions
V
FEEDBACK
= 15V
For 12V Versions
I
STBY
Standby Quiescent
Current
I
CL
Current Limit
I
L
Output Leakage Current
V
IN
= 40V, ON/OFF Pin = 0V
V
SWITCH
= 0V
V
SWITCH
= 1V, ON/OFF Pin = 0V
R
DS(ON)
Switch On-Resistance
I
SWITCH
= 500 mA
f
O
Oscillator Frequency
Measured at Switch Pin
D
Maximum Duty Cycle
Minimum Duty Cycle
I
BIAS
Feedback Bias
Current
ADJ Version Only
V
S/D
ON/OFF Pin
Voltage Thesholds
I
S/D
ON/OFF Pin Current
ON/OFF Pin = 0V
θ
JA
Thermal Resistance
N Package, Junction to Ambient (Note 6)
M Package, Junction to Ambient (Note 6)
Typ
Min
Max
Units
2.5
3.6
mA
2.5
mA
ON/OFF Pin = 0V
50
100/
150
μA
0.8
0.62/
0.575
1.2/
1.25
A
1
25
μA
6
15
mA
kHz
%
%
0.25
260
95
0
0.40/
0.60
275
225
V
FEEDBACK
= 1.3V
85
nA
1.4
0.8
2.0
V
20
95
105
7
37
μA
C/W
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see
the Electrical Characteristics.
Note 2:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin.
Note 3:
External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator
performance. When the LM2674 is used as shown in
Figures 2, 3
test circuits, system performance will be as specified by the system parameters section of the
Electrical Characteristics.
Note 4:
Typical numbers are at 25C and represent the most likely norm.
Note 5:
All limits guaranteed at room temperature (standard type face) and at
temperature extremes (bold type face)
. All room temperature limits are 100%
production tested. All limits at
temperature extremes
are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used
to calculate Average Outgoing Quality Level (AOQL).
Note 6:
Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional copper area will
lower thermal resistance further. See Application Information section in the application note accompanying this datasheet and the thermal model in
LM267X Made
Simple
(version 6.0) software. The value
θ
for the LLP (LD) package is specifically dependent on PCB trace area, trace material, and the number of layers and
thermal vias. For improved thermal resistance and power dissipation for the LLP package, refer to Application Note AN-1187.
L
www.national.com
4
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| LM2674LDX-ADJ | SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down Voltage Regulator |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM2674LDX-ADJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER Power Converter High Efficiency 500 mA Step-Down Voltage Regulator |
| LM2674M-12 | 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 |
| LM2674M-12/NOPB | 功能描述:直流/直流開關轉換器 PWR CONVERTER HI EFF 500MA SD VLTG REG 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 |
| LM2674M-12/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2674M-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 |
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