If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Supply Voltage (V
IN
)
ON/OFF Pin Voltage
Feedback Pin Voltage
Output Voltage to Ground
(Steady State)
Power Dissipation
Storage Temperature Range
ESD Susceptibility
−1V
Internally limited
−65˚C to +150˚C
63V
−0.3
≤
V
≤
+25V
−0.3
≤
V
≤
+25V
+215˚C
+245˚C
+260˚C
+150˚C
Operating Conditions
Temperature Range
Supply Voltage
−40˚C
≤
T
J
≤
+125˚C
4.5V to 60V
LM2591HV-3.3
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
Typ
(Note 3)
SYSTEM PARAMETERS
(Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
4.75V
≤
V
IN
≤
60V, 0.2A
≤
I
LOAD
≤
1A
3.3
3.168/3.135
3.432/3.465
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
77
V
V(min)
V(max)
LM2591HV-3.3
Limit
(Note 4)
Units
(Limits)
LM2591HV-5.0
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
Typ
(Note 3)
SYSTEM PARAMETERS
(Note 5) Test Circuit
Figure 1
V
OUT
Output Voltage
7V
≤
V
IN
≤
60V, 0.2A
≤
I
LOAD
≤
1A
5
4.800/4.750
5.200/5.250
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
82
V
V(min)
V(max)
%
LM2591HV-5.0
Limit
(Note 4)
Units
(Limits)
LM2591HV-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
LM2591HV-ADJ
Typ
(Note 3)
SYSTEM PARAMETERS
(Note 5) Test Circuit
Figure 1
V
FB
Feedback Voltage
4.5V
≤
V
IN
≤
60V, 0.2A
≤
I
LOAD
≤
1A
V
OUT
programmed for 3V. Circuit of
Figure 1.
η
Efficiency
V
IN
= 12V, V
OUT
= 3V, I
LOAD
= 1A
76
1.230
1.193/1.180
1.267/1.280
V
V(min)
V(max)
%
Limit
(Note 4)
Units
(Limits)
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2
LM2591HV
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. I
LOAD
= 500 mA
Symbol
Parameter
Conditions
LM2591HV-XX
Typ
(Note 3)
DEVICE PARAMETERS
I
b
f
O
Feedback Bias Current
Oscillator Frequency
Adjustable Version Only, V
FB
= 1.3V
(Note 6)
10
50/100
150
127/110
173/173
V
SAT
DC
I
CLIM
Saturation Voltage
Max Duty Cycle (ON)
Min Duty Cycle (OFF)
Switch current Limit
I
OUT
= 1A (Note 7) (Note 8)
(Note 8)
(Note 9)
Peak Current, (Note 7) (Note 8)
0.95
1.2/1.3
100
0
1.9
1.3/1.2
2.8/3.0
I
L
Output Leakage Current
(Note 7) (Note 9) (Note 10)
Output = 0V
Output = −1V
I
Q
I
STBY
θ
JC
θ
JA
θ
JA
θ
JA
θ
JA
ON/OFF CONTROL
Test Circuit
Figure 1
ON /OFF Pin Logic Input
V
IH
V
IL
I
H
I
L
ON /OFF Pin Input Current
Threshold Voltage
Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
= 2.5V (Regulator OFF)
V
LOGIC
= 0.5V (Regulator ON)
5
15
0.02
5
1.3
0.6
2.0
V
V(max)
V(min)
µA
µA(max)
µA
µA(max)
Operating Quiescent
Current
Standby Quiescent
Current
Thermal Resistance
TO220 or TO263 Package, Junction to Case
TO220 Package, Juncton to Ambient (Note 11)
TO263 Package, Juncton to Ambient (Note 12)
TO263 Package, Juncton to Ambient (Note 13)
TO263 Package, Juncton to Ambient (Note 14)
2
50
50
30
20
SD /SS pin = 0V
(Note 10)
90
200/250
SD /SS Pin Open (Note 9)
5
30
5
10
50
A
A(min)
A(max)
µA(max)
mA
mA(max)
mA
mA(max)
µA
µA(max)
˚C/W
˚C/W
˚C/W
˚C/W
˚C/W
nA
nA (max)
kHz
kHz(min)
kHz(max)
V
V(max)
%
Limit
(Note 4)
Units
(Limits)
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2:
The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.
Note 3:
Typical numbers are at 25˚C and represent the most likely norm.
Note 4:
All limits guaranteed at room temperature (standard type face) and at
temperature extremes (bold type face).
All room temperature limits are 100%
production tested. All limits at
temperature extremes
are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used
to calculate Average Outgoing Quality Level (AOQL).
Note 5:
External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the
LM2591HV is used as shown in the
Figure 1
test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.
Note 6:
The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current
overload.
Note 7:
No diode, inductor or capacitor connected to output pin.
Note 8:
Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9:
Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version to force the output transistor switch OFF.
Note 10:
V
IN
= 60V.
3
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LM2591HV
All Output Voltage Versions
Electrical Characteristics
(Continued)
Note 11:
Junction to ambient thermal resistance (no external heat sink) for the package mounted TO-220 package mounted vertically, with the leads soldered to
a printed circuit board with (1 oz.) copper area of approximately 1 in
2
.
Note 12:
Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 0.5 in
2
of (1 oz.) copper area.
Note 13:
Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in
2
of (1 oz.) copper area.
Note 14:
Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in
2
of (1 oz.) copper area on
the LM2591HVS side of the board, and approximately 16 in
2
of copper on the other side of the p-c board. See application hints in this data sheet and the thermal
