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參數資料
| 型號： | LM2670T-5.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync |
| 中文描述： | 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PZFM7 |
| 封裝： | TO-220, 7 PIN |
| 文件頁數： | 4/23頁 |
| 文件大小： | 361K |
| 代理商： | LM2670T-5.0 |
All Output Voltage Versions
Electrical Characteristics
Limits appearing in
bold type face
apply over the entire junction temperature range of operation, 40C to 125C.
Specifications appearing in normal type apply for T
= T
= 25C. Unless otherwise specified V
IN
=12V for the 3.3V, 5V and
Adjustable versions and V
IN
=24V for the 12V version, Sync pin open circuited..
Symbol
Parameter
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
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
ON/OFF
ON/OFF
Threshold
Voltage
I
ON/OFF
ON/OFF Input
Current
F
SYNC
Synchronization
Frequency
V
SYNC
SYNC
Threshold
Voltage
Typ
Min
Max
Units
4.2
6
mA
ON/OFF Pin = 0V
50
100/
150
μA
4.5
3.8/
3.6
5.25/
5.4
A
V
IN
= 40V, ON/OFF Pin = 0V
V
SWITCH
= 0V
16
200
15
μA
mA
I
= 3A
0.15
0.17/
0.29
Measured at Switch Pin
260
225
280
kHz
91
0
%
%
V
FEEDBACK
= 1.3V
85
nA
1.4
0.8
2.0
V
ON/OFF Input = 0V
20
45
μA
V
SYNC
(Pin 5)=3.5V, 50% Duty Cycle
400
KHz
1.4
V
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions under which of the device is
guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test condition, see the electrical Char-
acteristics tables.
Note 2:
ESD was applied using the human-body model, a 100pF capacitor discharged through a 1.5 k
resistor into each pin.
Note 3:
Typical values are determined with T
A
= T
J
= 25C and represent the most likely norm.
Note 4:
All limits are guaranteed at room temperature (standard type face) and at
temperature extremes (bold type face)
. All room temperature limits are 100%
tested during production with T
=T
= 25C. All limits at temperature extremes are guaranteed via correlation using standard standard Quality Control (SQC) meth-
ods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
www.national.com
4
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參數描述 |
|---|---|
| LM2670T-ADJ | 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 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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| LM2670T-ADJ/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter IC |
| LM2671 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM2671_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SIMPLE SWITCHER㈢ Power Converter High Efficiency 500mA Step-Down Voltage Regulator with Features |
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