NSC LM2592HV3.3MDC, LM2592HVSX-3.3, LM2592HVS-ADJ, LM2592HVS-3.3, LM2592HVADJMWC Datasheet

LM2592HV
SIMPLE SWITCHER

®

Power Converter 150 kHz 2A

Step-Down Voltage Regulator

General Description

The LM2592HV series of regulators are monolithic inte­grated 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 de­vices 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 perfor­mance features of the latter.

Requiring a minimum numberofexternalcomponents, 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 out­put voltage under all conditions of input voltage and output
load conditions, and

±

15% on the oscillator frequency. Ex­ternal 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 Simple high-efficiency step-down (buck) regulator
n Efficient pre-regulator for linear regulators
n On-card switching regulators
n Positive to Negative converter

Note:†Patent Number 5,382,918.

Typical Application (Fixed Output Voltage Versions)

10129401

SIMPLE SWITCHER®and

Switchers Made Simple

®

are registered trademarks of National Semiconductor Corporation.

August 2001

LM2592HV SIMPLE SWITCHER Power Converter 150 kHz 2A Step-Down Voltage Regulator

© 2001 National Semiconductor Corporation DS101294 www.national.com

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

) 63V

ON/OFF Pin Voltage

−0.3 ≤ V ≤ +25V
Feedback Pin Voltage −0.3 ≤ V ≤ +25V
Output Voltage to Ground

(Steady State) −1V
Power Dissipation Internally limited
Storage Temperature Range −65˚C to +150˚C
ESD Susceptibility

Human Body Model (Note 2) 2 kV

Lead Temperature

S Package

Vapor Phase (60 sec.) +215˚C
Infrared (10 sec.) +245˚C

T Package (Soldering, 10 sec.) +260˚C

Maximum Junction Temperature +150˚C

Operating Conditions

Temperature Range −40˚C ≤ TJ≤ +125˚C
Supply Voltage 4.5V to 60V

LM2592HV-3.3
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range.

Symbol Parameter Conditions LM2592HV-3.3 Units

(Limits)

Typ Limit

(Note 3) (Note 4)

SYSTEM PARAMETERS (Note 5) Test Circuit

Figure 1

V

OUT

Output Voltage 4.75V ≤ VIN≤ 60V, 0.2A ≤ I

LOAD

≤ 2A 3.3 V

3.168/3.135 V(min)

3.432/3.465 V(max)

η Efficiency V

IN

= 12V, I

LOAD

=2A 76

LM2592HV-5.0
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range.

Symbol Parameter Conditions LM2592HV-5.0 Units

(Limits)

Typ Limit

(Note 3) (Note 4)

SYSTEM PARAMETERS (Note 5) Test Circuit

Figure 1

V

OUT

Output Voltage 7V ≤ VIN≤ 60V, 0.2A ≤ I

LOAD

≤ 2A 5 V

4.800/4.750 V(min)

5.200/5.250 V(max)

η Efficiency V

IN

= 12V, I

LOAD

=2A 81 %

LM2592HV-ADJ
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range.

Symbol Parameter Conditions LM2592HV-ADJ Units

(Limits)

Typ Limit

(Note 3) (Note 4)

SYSTEM PARAMETERS (Note 5) Test Circuit

Figure 1

V

FB

Feedback Voltage 4.5V ≤ VIN≤ 60V, 0.2A ≤ I

LOAD

≤ 2A 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, V

OUT

= 3V, I

LOAD

=2A 75 %

LM2592HV

www.national.com 2

All Output Voltage Versions
Electrical Characteristics

Specifications with standard type face are for TJ= 25˚C, and those with boldface type apply over full Operating Tempera­ture Range. Unless otherwise specified, V

IN

= 12V for the 3.3V, 5V, and Adjustable version. I

LOAD

= 500 mA

Symbol Parameter Conditions LM2592HV-XX Units

(Limits)

Typ Limit

(Note 3) (Note 4)

DEVICE PARAMETERS

I

b

Feedback Bias Current Adjustable Version Only, VFB= 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

= 2A (Note 7) (Note 8) 1.10 V

1.3/1.4 V(max)

DC Max Duty Cycle (ON) (Note 8) 100 %

Min Duty Cycle (OFF) (Note 9) 0

I

CLIM

Switch current Limit Peak Current, (Note 7) (Note 8) 3.0 A

2.4/2.3 A(min)

3.7/4.0 A(max)

I

L

Output Leakage Current (Note 7) (Note 9) (Note 10) Output = 0V 50 µA(max)

Output = −1V 5 mA

30 mA(max)

I

Q

Operating Quiescent SD /SS Pin Open (Note 9) 5mA
Current 10 mA(max)

I

STBY

Standby Quiescent SD /SS pin = 0V (Note 10) 90 µA
Current 200/250 µA(max)

θ

JC

Thermal Resistance TO220 or TO263 Package, Junction to Case 2 ˚C/W

θ

JA

TO220 Package, Juncton to Ambient (Note 11) 50 ˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 12) 50 ˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 13) 30 ˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 14) 20 ˚C/W

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 Input Current V

LOGIC

= 2.5V (Regulator OFF) 5 µA

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
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.

LM2592HV

www.national.com3

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 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

model in Switchers Made Simple available at http://power.national.com.

LM2592HV

www.national.com 4

Typical Performance Characteristics (Circuit of

Figure 1

)

Normalized

Output Voltage Line Regulation Efficiency

10129402

10129403 10129404

Switch Saturation

Voltage Switch Current Limit Dropout Voltage

10129405

10129406

10129407

Operating

Quiescent Current

Shutdown

Quiescent Current

Minimum Operating

Supply Voltage

10129408 10129409

10129410

LM2592HV

www.national.com5

Typical Performance Characteristics (Circuit of

Figure 1

) (Continued)

Feedback Pin

Bias Current Switching Frequency ON/OFF Threshold Voltage

10129411 10129413

10129479

ON/OFF Pin Current (Sinking) Internal Gain-Phase Characteristics

10129480

10129478

LM2592HV

www.national.com 6