The LM2592HV series of regulators are monolithic inte-
grated circuits that provide all the active functions for a
step-down (buck) switching regulator, capable of driving a
2A load with excellent line and load regulation. These de-
vices are available in fixed output voltages of 3.3V, 5V, and
an adjustable output version.
This series of switching regulators is similar to the
LM2593HV, but without some of the supervisory and perfor-
mance features of the latter.
Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation
†
, improved line and load specifications and a
fixed-frequency oscillator.
The LM2592HV operates at a switching frequency of 150
kHz thus allowing smaller sized filter components than what
would be needed with lower frequency switching regulators.
Available in a standard 5-lead TO-220 package with several
different lead bend options, and a 5-lead TO-263 Surface
mount package.
Other features include a guaranteed
±
4% tolerance on out-
put voltage under all conditions of input voltage and output
load conditions, and
±
15% on the oscillator frequency. Ex-
ternal shutdown is included, featuring typically 90 µA
standby current. Self protection features include a two stage
current limit for the output switch and an over temperature
shutdown for complete protection under fault conditions.
Features
n
3.3V, 5V, and adjustable output versions
n
Adjustable version output voltage range, 1.2V to 57V
±
4% max over line and load conditions
n
Guaranteed 2A output load current
n
Available in 5-pin TO-220 and TO-263 (surface mount)
Package
n
Input voltage range up to 60V
n
150 kHz fixed frequency internal oscillator
n
On/Off control
n
Low power standby mode, I
Q
typically 90 µA
n
High Efficiency
n
Thermal shutdown and current limit protection
Applications
n
n
n
n
Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive to Negative converter
Note:
†
Patent Number 5,382,918.
Typical Application
(Fixed Output Voltage Versions)
Connection Diagrams
Bent and Staggered Leads, Through Hole Package
5-Lead TO-220 (T)
Surface Mount Package
5-Lead TO-263 (S)
Order Number LM2592HVT-3.3, LM2592HVT-5.0,
or LM2592HVT-ADJ
Order Number LM2592HVS-3.3, LM2592HVS-5.0,
or LM2592HVS-ADJ
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1
2019 SEP
LM2592HV
Absolute Maximum Ratings
(Note 1)
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
63V
−0.3
≤
V
≤
+25V
−0.3
≤
V
≤
+25V
−1V
Internally limited
−65˚C to +150˚C
Human Body Model (Note 2)
Lead Temperature
S Package
Vapor Phase (60 sec.)
Infrared (10 sec.)
T Package (Soldering, 10 sec.)
Maximum Junction Temperature
2 kV
+215˚C
+245˚C
+260˚C
+150˚C
Operating Conditions
Temperature Range
Supply Voltage
−40˚C
≤
T
J
≤
+125˚C
4.5V to 60V
LM2592HV-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
≤
2A
3.3
3.168/3.135
3.432/3.465
η
Efficiency
V
IN
= 12V, I
LOAD
= 2A
76
V
V(min)
V(max)
LM2592HV-3.3
Limit
(Note 4)
Units
(Limits)
LM2592HV-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
≤
2A
5
4.800/4.750
5.200/5.250
η
Efficiency
V
IN
= 12V, I
LOAD
= 2A
81
V
V(min)
V(max)
%
LM2592HV-5.0
Limit
(Note 4)
Units
(Limits)
LM2592HV-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
LM2592HV-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
≤
2A
V
OUT
programmed for 3V. Circuit of
Figure 1.
η
Efficiency
V
IN
= 12V, V
OUT
= 3V, I
LOAD
= 2A
2
Limit
(Note 4)
Units
(Limits)
1.230
1.193/1.180
1.267/1.280
75
V
V(min)
V(max)
%
http://www.hgsemi.com.cn
2019 SEP
LM2592HV
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
LM2592HV-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
= 2A (Note 7) (Note 8)
(Note 8)
(Note 9)
Peak Current, (Note 7) (Note 8)
1.10
1.3/1.4
100
0
3.0
2.4/2.3
3.7/4.0
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)
http://www.hgsemi.com.cn
3
2019 SEP
LM2592HV
All Output Voltage Versions
Electrical Characteristics
(Continued)
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
LM2592HV 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.
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 LM2592HVS 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
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