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LM2594HVN-5.0 Fiches technique(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce LM2594HVN-5.0
Description  SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2594HVN-5.0 Fiches technique(HTML) 4 Page - National Semiconductor (TI)

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LM2594/LM2594HV-ADJ
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range
Symbol
Parameter
Conditions
LM2594/LM2594HV-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 ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A
1.230
V
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, ILOAD = 0.5A
80
%
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, 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 = 100 mA
Symbol
Parameter
Conditions
LM2594/LM2594HV-XX
Units
(Limits)
Typ
Limit
(Note 3)
(Note 4)
DEVICE PARAMETERS
I
b
Feedback Bias Current
Adjustable Version Only, VFB = 1.3V
10
50/100
nA
f
O
Oscillator Frequency
(Note 6)
150
kHz
127/110
kHz(min)
173/173
kHz(max)
V
SAT
Saturation Voltage
I
OUT = 0.5A (Note 7) (Note 8)
0.9
V
1.1/1.2
V(max)
DC
Max Duty Cycle (ON)
(Note 8)
100
%
Min Duty Cycle (OFF)
(Note 9)
0
I
CL
Current Limit
Peak Current, (Note 7) (Note 8)
0.8
A
0.65/0.58
A(min)
1.3/1.4
A(max)
I
L
Output Leakage Current
(Note 7) (Note 9) (Note 10)
Output = 0V
50
µA(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
µA
Current
LM2594
200/250
µA(max)
LM2594HV
140
250/300
µA(max)
θ
JA
Thermal Resistance
N Package, Junction to Ambient (Note 11)
95
˚C/W
M Package, Junction to Ambient (Note 11)
150
ON/OFF CONTROL Test Circuit
Figure 1
ON /OFF Pin Logic Input
1.3
V
V
IH
Threshold Voltage
Low (Regulator ON)
0.6
V(max)
V
IL
High (Regulator OFF)
2.0
V(min)
I
H
ON /OFF Pin
V
LOGIC = 2.5V (Regulator OFF)
5
µA
Input Current
15
µA(max)
I
L
V
LOGIC = 0.5V (Regulator ON)
0.02
µA
5
µA(max)
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-
tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
www.national.com
4


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