參數(shù)資料
型號： LM2595-3.3MDC
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 2.6 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC
封裝： DIE
文件頁數(shù)： 28/33頁
文件大?。?/td> 1016K
代理商： LM2595-3.3MDC
LM2595-ADJ
Electrical Characteristics
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
LM2595-ADJ
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
SYSTEM PARAMETERS (Note 5) Test Circuit
Figure 1
V
FB
Feedback Voltage
4.5V
≤ V
IN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A
1.230
V
OUT programmed for 3V. Circuit of Figure 1
1.193/1.180
V(min)
1.267/1.280
V(max)
η
Efficiency
V
IN = 12V, VOUT = 3V, ILOAD = 1A
78
%
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 and VIN = 24V for the 12V ver-
sion. I
LOAD = 200 mA.
Symbol
Parameter
Conditions
LM2595-XX
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
DEVICE PARAMETERS
I
b
Feedback Bias Current
Adjustable Version Only,V
FB = 1.3V
10
nA
50/100
nA (max)
f
O
Oscillator Frequency
(Note 6)
150
kHz
127/110
kHz(min)
173/173
kHz(max)
V
SAT
Saturation Voltage
I
OUT = 1A (Notes 7, 8)
1
V
1.2/1.3
V(max)
DC
Max Duty Cycle (ON)
(Note 8)
100
%
Min Duty Cycle (OFF)
(Note 9)
0
I
CL
Current Limit
Peak Current (Notes 7, 8)
1.5
A
1.2/1.15
A(min)
2.4/2.6
A(max)
I
L
Output Leakage Current
Output = 0V
(Notes 7, 9) and (Note 10)
50
A(max)
Output = 1V
2
mA
15
mA(max)
I
Q
Quiescent Current
(Note 9)
5
mA
10
mA(max)
I
STBY
Standby Quiescent
ON/OFF pin = 5V (OFF)
(Note 10)
85
A
Current
200/250
A(max)
θ
JC
Thermal Resistance
TO-220 or TO-263 Package, Junction to Case
2
C/W
θ
JA
TO-220 Package, Junction to Ambient (Note 11)
50
C/W
θ
JA
TO-263 Package, Junction to Ambient (Note 12)
50
C/W
θ
JA
TO-263 Package, Junction to Ambient (Note 13)
30
C/W
θ
JA
TO-263 Package, Junction to Ambient (Note 14)
20
C/W
ON/OFF CONTROL Test Circuit
Figure 1
ON /OFF Pin Logic Input
1.3
V
IH
Threshold Voltage
Low (Regulator ON)
0.6
V(max)
V
IL
High (Regulator OFF)
2.0
V(min)
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