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参数资料
| 型号： | LM2590HV5.0MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 18/24页 |
| 文件大小： | 816K |
| 代理商： | LM2590HV5.0MDC |
LM2590HV-ADJ
Electrical Characteristics (Continued)
Specifications with standard type face are for T
J = 25C, and those with boldface type apply over full Operating Tempera-
ture Range.
Symbol
Parameter
Conditions
LM2590HV-ADJ
Units
(Limits)
Typ
Limit
η
Efficiency
V
IN = 12V, VOUT = 3V, ILOAD =1A
76
%
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
J = 25C, and those with boldface type apply over full Operating Tempera-
ture Range. Unless otherwise specified, V
IN = 12V for the 3.3V, 5V, and Adjustable version. ILOAD = 500 mA
Symbol
Parameter
Conditions
LM2590HV-XX
Units
(Limits)
Typ
Limit
DEVICE PARAMETERS
I
b
Feedback Bias Current
Adjustable Version Only, V
FB = 1.3V
10
nA
50/100
nA (max)
f
O
Oscillator Frequency
150
kHz
127/110
kHz(min)
173/173
kHz(max)
V
SAT
Saturation Voltage
I
OUT = 1A (Note 8) (Note 9)
0.95
V
1.2/1.3
V(max)
DC
Max Duty Cycle (ON)
100
%
Min Duty Cycle (OFF)
0
I
CLIM
Switch current Limit
Peak Current, (Note 8) (Note 9)
1.9
A
1.3/1.2
A(min)
2.8/3.0
A(max)
I
L
Output Leakage Current
Output = 0V
50
A(max)
Output = 1V
5
mA
30
mA(max)
I
Q
Operating Quiescent
SD /SS Pin Open (Note 10)
5mA
Current
10
mA(max)
I
STBY
Standby Quiescent
SD /SS pin = 0V
90
A
Current
200/250
A(max)
θ
JC
Thermal Resistance
TO220 or TO263 Package, Junction to Case
2
C/W
θ
JA
TO220 Package, Juncton to Ambient (Note 12)
50
C/W
θ
JA
TO263 Package, Juncton to Ambient (Note 13)
50
C/W
θ
JA
TO263 Package, Juncton to Ambient (Note 14)
30
C/W
θ
JA
TO263 Package, Juncton to Ambient (Note 15)
20
C/W
SHUTDOWN/SOFT-START CONTROL Test Circuit of
V
SD
Shutdown Threshold
1.3
V
Voltage
Low, (Shutdown Mode)
0.6
V(max)
High, (Soft-start Mode)
2
V(min)
V
SS
Soft-start Voltage
V
OUT = 20% of Nominal Output Voltage
2
V
OUT = 100% of Nominal Output Voltage
3
I
SD
Shutdown Current
V
SHUTDOWN = 0.5V
5A
10
A(max)
I
SS
Soft-start Current
V
Soft-start = 2.5V
1.5
A
5
A(max)
LM2590HV
www.national.com
3
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