參數(shù)資料
型號(hào)： LM2641-ADJMDC
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, UUC
封裝： DIE
文件頁(yè)數(shù)： 18/22頁(yè)
文件大?。?/td> 531K
代理商： LM2641-ADJMDC
Absolute Maximum Ratings (Notes 2,
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
IN, SW1, and SW2
0.3 to 31V
FB1 and FB2
0.3 to 3V
SD, ON/OFF1, ON/OFF2,
2NDFB/FPWM, SYNC, REF,
SS1, SS2, COMP1,
COMP2 and CSL1
0.3 to (V
LIN +0.3)V
LIN
0.3 to 6V
CSH1, CSH2, and CSL2 (Note
0.3 to 9V
Voltage from CBOOT1 to SW1
and from CBOOT2 to SW2
0.3 to 5V
Voltage from HDRV1 to SW1
and from HDRV2 to SW2
0.3V
Voltage from CBOOT1 to
HDRV1 and from CBOOT2
HDRV2
0.3V
Junction Temp.
+150C
Power Dissipation (Note 3)
883 mW
Ambient Storage Temp. (T
J)
65 to +150C
Soldering Dwell Time, Temp. (Note 4)
Wave
4 sec, 260C
Infrared
10 sec, 240C
Vapor Phase
75 sec, 219C
ESD Rating (Note 5)
2 kV
Operating Ratings(Notes 1, 2)
V
IN
5.5 to 30V
Junction Temp. (T
J)
0 to +125C
Electrical Characteristics
Typicals and limits appearing in regular type apply for T
J = 25C. Limits appearing in boldface type apply over the entire junc-
tion temperature range for operation, 0 to +125C. Unless otherwise specified under the Parameter or Conditions columns, V
IN
= 10V, and V
SD =VON/OFF1 =VON/OFF2 = 5V. (Notes 2, 6, 7)
Symbol
Parameter
Conditions
Typical
Limit
Units
System
V
IN
Input Supply Voltage Range
5.5
V(min)
30
V(max)
V
OUT1
Output Voltage Adjustment
Range
2.2
V(min)
6.0
V(max)
V
OUT2
Output Voltage Adjustment
Range
2.2
V(min)
8.0
V(max)
V
OUT/VOUT
Load Regulation
0 mV
≤ (CSH1-CSL1) ≤ 80 mV,
0mV
≤ (CSH2-CSL2) ≤ 80 mV
0.5
%
V
OUT/VIN
Line Regulation
5.5V
≤ V
IN ≤ 30V
0.002
%/V
I
IN
Input Supply Current
0.6
mA
V
FB1 =VFB2 = 1.4V,
1
mA(max)
V
CSH1 = 5.2V, VCSL1 = 5V,
V
CSH2 = 3.5V, VCSL2 = 3.3V
Standing By (Note 9)
80
A
V
ON/OFF1 =VON/OFF2 =0V
150
A(max)
Shut Down (Note 10)
25
A
V
SD =0V
60
A(max)
I
SS1,ISS2
Soft-Start Source Current
V
SS1 =VSS2 = 1V
4.75
A
2.0
A(min)
7.0
A(max)
Soft-Start Sink Current
10
A
V
PCL
Positive Current Limit Voltage
(Voltage from CSH1 to CSL1
and from CSH2 to CSL2)
100
mV
80
mV(min)
140
mV(max)
V
NCL
Negative Current Limit Voltage
(Voltage from CSH1 to CSL1
and from CSH2 to CSL2)
V
2NDFB/FPWM = 0.8V
100
mV
80
mV(min)
140
mV(max)
LM2641
www.national.com
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LM2642 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:
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