LM2593HV
SIMPLE SWITCHER

Power Converter 150 kHz 2A

Step-Down Voltage Regulator, with Features

General Description

The LM2593HV 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
LM2592HV with additional supervisory and performance fea-
tures.

Requiring a minimum number of external components, these
regulators are simple to use and include internal frequency
compensation

, improved line and load specifications,

fixed-frequency oscillator, Shutdown/Soft-start, output error
flag and flag delay.

The LM2593HV 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 7-lead TO-220 package with several
different lead bend options, and a 7-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

3.3V, 5V, and adjustable output versions

Adjustable version output voltage range, 1.2V to 57V

4% max over line and load conditions

Guaranteed 2A output load current

Available in 7-pin TO-220 and TO-263 (surface mount)
Package

Input voltage range up to 60V

150 kHz fixed frequency internal oscillator

Shutdown/Soft-start

Out of regulation error flag

Error flag delay

Low power standby mode, I

typically 90 µA

High Efficiency

Thermal shutdown and current limit protection

Applications

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)

10133301

SIMPLE SWITCHER

and

Switchers Made Simple

are registered trademarks of National Semiconductor Corporation.

December 2001

LM2593HV

SIMPLE

SWITCHER

Power

Converter

150

kHz

Step-Down

oltage

Regulator

with

Features

DS101333

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

)

63V

SD /SS Pin Input Voltage (Note 2)

Delay Pin Voltage (Note 2)

1.5V

Flag Pin Voltage

-0.3

45V

Feedback Pin Voltage

-0.3

+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 3)

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

+125°C

Supply Voltage

4.5V to 60V

LM2593HV-3.3
Electrical Characteristics

Specifications with standard type face are for T

= 25°C, and those with boldface type apply over full Operating Tempera-

ture Range.

Symbol

Parameter

Conditions

LM2593HV-3.3

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

SYSTEM PARAMETERS (Note 6) Test Circuit

Figure 1

OUT

Output Voltage

4.75V

60V, 0.2A

LOAD

3.3

3.168/3.135

V(min)

3.432/3.465

V(max)

Efficiency

= 12V, I

LOAD

= 2A

LM2593HV-5.0
Electrical Characteristics

Specifications with standard type face are for T

= 25°C, and those with boldface type apply over full Operating Tempera-

ture Range.

Symbol

Parameter

Conditions

LM2593HV-5.0

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

SYSTEM PARAMETERS (Note 6) Test Circuit

Figure 1

OUT

Output Voltage

60V, 0.2A

LOAD

4.800/4.750

V(min)

5.200/5.250

V(max)

Efficiency

= 12V, I

LOAD

= 2A

LM2593HV-ADJ
Electrical Characteristics

Specifications with standard type face are for T

= 25°C, and those with boldface type apply over full Operating Tempera-

ture Range.

Symbol

Parameter

Conditions

LM2593HV-ADJ

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

SYSTEM PARAMETERS (Note 6) Test Circuit

Figure 1

Feedback Voltage

4.5V

60V, 0.2A

LOAD

1.230

OUT

programmed for 3V. Circuit of

Figure 1.

1.193/1.180

V(min)

1.267/1.280

V(max)

LM2593HV

www.national.com

LM2593HV-ADJ
Electrical Characteristics

(Continued)

Specifications with standard type face are for T

= 25°C, and those with boldface type apply over full Operating Tempera-

ture Range.

Symbol

Parameter

Conditions

LM2593HV-ADJ

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

Efficiency

= 12V, V

OUT

= 3V, I

LOAD

= 2A

All Output Voltage Versions
Electrical Characteristics

Specifications with standard type face are for T

= 25°C, and those with boldface type apply over full Operating Tempera-

ture Range. Unless otherwise specified, V

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

LOAD

= 500 mA

Symbol

Parameter

Conditions

LM2593HV-XX

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

DEVICE PARAMETERS

Feedback Bias Current

Adjustable Version Only, V

= 1.3V

50/100

nA (max)

Oscillator Frequency

(Note 7)

150

kHz

127/110

kHz(min)

173/173

kHz(max)

SAT

Saturation Voltage

OUT

= 2A (Note 8) (Note 9)

1.10

1.3/1.4

V(max)

Max Duty Cycle (ON)

(Note 9)

100

Min Duty Cycle (OFF)

(Note 10)

CLIM

Switch current Limit

Peak Current, (Note 8) (Note 9)

3.0

2.4/2.3

A(min)

3.7/4.0

A(max)

Output Leakage Current

(Note 8) (Note 10) (Note 11)

Output = 0V

µA(max)

Output = -1V

mA(max)

Operating Quiescent

SD /SS Pin Open (Note 10)

Current

mA(max)

STBY

Standby Quiescent

SD /SS pin = 0V

(Note 11)

µA

Current

200/250

µA(max)

Thermal Resistance

TO220 or TO263 Package, Junction to Case

°C/W

TO220 Package, Juncton to Ambient (Note 12)

°C/W

TO263 Package, Juncton to Ambient (Note 13)

°C/W

TO263 Package, Juncton to Ambient (Note 14)

°C/W

TO263 Package, Juncton to Ambient (Note 15)

°C/W

SHUTDOWN/SOFT-START CONTROL Test Circuit of

Figure 1

Shutdown Threshold

1.3

Voltage

Low, (Shutdown Mode)

0.6

V(max)

High, (Soft-start Mode)

V(min)

Soft-start Voltage

OUT

= 20% of Nominal Output Voltage

OUT

= 100% of Nominal Output Voltage

Shutdown Current

SHUTDOWN

= 0.5V

µA

µA(max)

Soft-start Current

Soft-start

= 2.5V

1.5

µA

µA(max)

LM2593HV

www.national.com

All Output Voltage Versions
Electrical Characteristics

(Continued)

Specifications with standard type face are for T

= 25°C, and those with boldface type apply over full Operating Tempera-

ture Range. Unless otherwise specified, V

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

LOAD

= 500 mA

Symbol

Parameter

Conditions

LM2593HV-XX

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

FLAG/DELAY CONTROL Test Circuit of

Figure 1

Regulator Dropout Detector

Low (Flag ON)

Threshold Voltage

%(min)

%(max)

SAT

Flag Output Saturation

SINK

= 3 mA

0.3

Voltage

DELAY

= 0.5V

0.7/1.0

V(max)

Flag Output Leakage Current

FLAG

= 60V

0.3

µA

Delay Pin Threshold

1.25

Voltage

Low (Flag ON)

1.21

V(min)

High (Flag OFF) and V

OUT

Regulated

1.29

V(max)

Delay Pin Source Current

DELAY

= 0.5V

µA

µA(max)

Delay Pin Saturation

Low (Flag ON)

350/400

mV(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: Voltage internally clamped. If clamp voltage is exceeded, limit current to a maximum of 1 mA.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.

Note 4: Typical numbers are at 25°C and represent the most likely norm.

Note 5: 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 6: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the
LM2593HV is used as shown in the

Figure 1

test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.

Note 7: 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 8: No diode, inductor or capacitor connected to output pin.

Note 9: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

Note 10: 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 11: V

= 60V.

Note 12: 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

Note 13: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 0.5 in

of (1 oz.) copper area.

Note 14: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in

of (1 oz.) copper area.

Note 15: Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in

of (1 oz.) copper area on

the LM2593HVS side of the board, and approximately 16 in

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.

LM2593HV

Document Outline

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Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LM2593HV