National Semiconductor LM2593HV Technical data

LM2593HV SIMPLE SWITCHER

Power Converter 150 kHz 2A

Step-Down Voltage Regulator, with Features

December 2001

LM2593HV SIMPLE SWITCHER Power Converter 150 kHz 2A Step-Down Voltage Regulator, with

Features

General Description

The LM2593HV 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 LM2592HV withadditionalsupervisory and performance features.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation 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 put voltage under all conditions of input voltage and output load conditions, and 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.

†

, improved line and load specifications,

4% tolerance on out-

15% on the oscillator frequency. Ex-

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 7-pin TO-220 and TO-263 (surface mount)

Package

n Input voltage range up to 60V n 150 kHz fixed frequency internal oscillator n Shutdown/Soft-start n Out of regulation error flag n Error flag delay n Low power standby mode, I n High Efficiency n Thermal shutdown and current limit protection

typically 90 µA

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)

10133301

SIMPLE SWITCHER®and

Switchers Made Simple

are registered trademarks of National Semiconductor Corporation.

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/

LM2593HV

Distributors for availability and specifications.

Maximum Supply Voltage (V SD /SS Pin Input Voltage (Note 2) Delay Pin Voltage (Note 2) 1.5V Flag Pin Voltage −0.3 ≤ V ≤45V 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

) 63V

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 ≤ TJ≤ +125˚C Supply Voltage 4.5V to 60V

LM2593HV-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 LM2593HV-3.3 Units

Typ Limit

(Note 4) (Note 5) SYSTEM PARAMETERS (Note 6) Test Circuit V

OUT

η Efficiency V

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

= 12V, I

Figure 1

≤ 2A 3.3 V

LOAD

=2A 76

LOAD

3.168/3.135 V(min)

3.432/3.465 V(max)

(Limits)

LM2593HV-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 LM2593HV-5.0 Units

(Limits)

SYSTEM PARAMETERS (Note 6) Test Circuit

OUT

η Efficiency V

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

= 12V, I

Typ Limit

(Note 4) (Note 5)

Figure 1

≤ 2A 5 V

LOAD

4.800/4.750 V(min)

5.200/5.250 V(max)

=2A 81 %

LOAD

LM2593HV-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 LM2593HV-ADJ Units

(Limits)

SYSTEM PARAMETERS (Note 6) Test Circuit

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

programmed for 3V. Circuit of

OUT

Figure 1

Typ Limit

(Note 4) (Note 5)

≤ 2A 1.230 V

LOAD

Figure 1

. 1.193/1.180 V(min)

1.267/1.280 V(max)

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LM2593HV-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 LM2593HV-ADJ Units

η Efficiency V

= 12V, V

(Continued)

= 3V, I

OUT

Typ Limit

(Note 4) (Note 5)

=2A 75 %

LOAD

(Limits)

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

Symbol Parameter Conditions LM2593HV-XX Units

DEVICE PARAMETERS

SAT

Feedback Bias Current Adjustable Version Only, VFB= 1.3V 10 nA

Oscillator Frequency (Note 7) 150 kHz

Saturation Voltage I

DC Max Duty Cycle (ON) (Note 9) 100 %

Min Duty Cycle (OFF) (Note 10) 0

CLIM

Switch current Limit Peak Current, (Note 8) (Note 9) 3.0 A

Output Leakage Current (Note 8) (Note 10) (Note 11) Output = 0V 50 µA(max)

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

STBY

Standby Quiescent SD /SS pin = 0V (Note 11) 90 µA Current 200/250 µA(max)

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

SHUTDOWN/SOFT-START CONTROL Test Circuit of V

Shutdown Threshold 1.3 V Voltage Low, (Shutdown Mode) 0.6 V(max)

Soft-start Voltage V

Shutdown Current V

Soft-start Current V

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

= 500 mA

LOAD

Typ Limit

(Limits)

(Note 4) (Note 5)

50/100 nA (max)

127/110 kHz(min) 173/173 kHz(max)

= 2A (Note 8) (Note 9) 1.10 V

OUT

1.3/1.4 V(max)

2.4/2.3 A(min)

3.7/4.0 A(max)

Output = −1V 5 mA

30 mA(max)

TO220 Package, Juncton to Ambient (Note 12) 50 ˚C/W TO263 Package, Juncton to Ambient (Note 13) 50 ˚C/W TO263 Package, Juncton to Ambient (Note 14) 30 ˚C/W TO263 Package, Juncton to Ambient (Note 15) 20 ˚C/W

Figure 1

High, (Soft-start Mode) 2 V(min)

= 20% of Nominal Output Voltage 2 V

OUT

= 100% of Nominal Output Voltage 3

OUT SHUTDOWN

= 0.5V 5µA

10 µA(max)

Soft-start

= 2.5V 1.5 µA

5 µA(max)

LM2593HV

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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 Tempera-

LM2593HV

ture Range. Unless otherwise specified, V

Symbol Parameter Conditions LM2593HV-XX Units

FLAG/DELAY CONTROL Test Circuit of

Regulator Dropout Detector Low (Flag ON) 96 % Threshold Voltage 92 %(min)

SAT

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

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

the LM2593HVS side of the board, and approximately 16 in model in Switchers Made Simple available at http://power.national.com.

Flag Output Saturation I Voltage V Flag Output Leakage Current V Delay Pin Threshold 1.25 V Voltage Low (Flag ON) 1.21 V(min)

Delay Pin Source Current V

Delay Pin Saturation Low (Flag ON) 70 mV

Figure 1

= 60V.

(Continued)

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

LOAD

= 500 mA

Typ Limit

(Note 4) (Note 5)

Figure 1

98 %(max)

= 3 mA 0.3 V

SINK

= 0.5V 0.7/1.0 V(max)

DELAY

= 60V 0.3 µA

FLAG

High (Flag OFF) and V

= 0.5V 3 µA

DELAY

Regulated 1.29 V(max)

OUT

6 µA(max)

350/400 mV(max)

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

of copper on the other side of the p-c board. See application hints in this data sheet and the thermal

of (1 oz.) copper area.

of (1 oz.) copper area on

(Limits)

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LM2593HV

Typical Performance Characteristics (Circuit of

Normalized

Output Voltage Line Regulation Efficiency

10133302

Switch Saturation

Voltage Switch Current Limit Dropout Voltage

Figure 1

)

10133303 10133304

Operating

Quiescent Current

10133305

10133306

Shutdown

Quiescent Current

10133308 10133309

10133307

Minimum Operating

Supply Voltage

10133310

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Typical Performance Characteristics (Circuit of

Figure 1

) (Continued)

LM2593HV

Feedback Pin

Bias Current

Soft-start

10133311

Flag Saturation

Voltage Switching Frequency

10133312

Shutdown /Soft-start

Current Delay Pin Current

10133313

Soft-start Response

10133314

10133318

10133315

10133316

Shutdown/Soft-start

Threshold Voltage Internal Gain-Phase Characteristics

10133353

10133378

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LM2593HV

Typical Performance Characteristics (Circuit of

Continuous Mode Switching Waveforms

= 20V, V

L = 32 µH, C

OUT

Horizontal Time Base: 2 µs/div.

A: Output Pin Voltage, 10V/div. B: Inductor Current 1A/div. C: Output Ripple Voltage, 50 mV/div.

Load Transient Response for Continuous Mode

= 20V, V

L = 32 µH, C

OUT

= 5V, I

OUT

= 220 µF, C

= 5V, I

LOAD

= 220 µF, C

=2A

LOAD

ESR=50mΩ

OUT

= 500 mA to 2A

ESR=50mΩ

OUT

10133320

A: Output Pin Voltage, 10V/div. B: Inductor Current 0.5A/div. C: Output Ripple Voltage, 100 mV/div.

Load Transient Response for Discontinuous Mode

Figure 1

) (Continued)

Discontinuous Mode Switching Waveforms

= 20V, V

L = 10 µH, C

OUT

= 5V, I

OUT

= 330 µF, C

= 500 mA

LOAD

ESR=45mΩ

OUT

Horizontal Time Base: 2 µs/div.

= 20V, V

L = 10 µH, C

= 5V, I

OUT

= 330 µF, C

OUT

= 500 mA to 2A

LOAD

OUT

ESR=45mΩ

10133319

Horizontal Time Base: 50 µs/div.

10133321

A: Output Voltage, 100 mV/div. (AC) B: 500 mA to 2A Load Pulse

Connection Diagrams and Order Information

Bent and Staggered Leads, Through Hole Package

7-Lead TO-220 (T)

Order Number LM2593HVT-3.3, LM2593HVT-5.0,

or LM2593HVT-ADJ

See NS Package Number TA07B

10133350

Order Number LM2593HVS-3.3, LM2593HVS-5.0,

Horizontal Time Base: 200 µs/div.

10133322

Surface Mount Package

7-Lead TO-263 (S)

10133323

or LM2593HVS-ADJ

See NS Package Number TS7B

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National Semiconductor LM2593HV Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual

Features

General Description

Applications

Typical Application (Fixed Output Voltage Versions)

Absolute Maximum Ratings (Note 1)

Operating Conditions

LM2593HV-3.3 Electrical Characteristics

LM2593HV-5.0 Electrical Characteristics

LM2593HV-ADJ Electrical Characteristics

All Output Voltage Versions Electrical Characteristics

Typical Performance Characteristics (Circuit of

Connection Diagrams and Order Information