National Semiconductor LM2590HV Technical data

LM2590HV SIMPLE SWITCHER

Power Converter 150 kHz 1A

Step-Down Voltage Regulator, with Features

December 2001

LM2590HV SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with

Features

General Description

The LM2590HV series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A 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 LM2591HV 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 LM2590HV 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 1A 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)

10134701

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/

LM2590HV

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

LM2590HV-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 LM2590HV-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

≤ 1A 3.3 V

LOAD

=1A 77

LOAD

3.168/3.135 V(min)

3.432/3.465 V(max)

(Limits)

LM2590HV-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 LM2590HV-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

≤ 1A 5 V

LOAD

4.800/4.750 V(min)

5.200/5.250 V(max)

=1A 82 %

LOAD

LM2590HV-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 LM2590HV-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)

≤ 1A 1.230 V

LOAD

Figure 1

. 1.193/1.180 V(min)

1.267/1.280 V(max)

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LM2590HV-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 LM2590HV-ADJ Units

η Efficiency V

= 12V, V

(Continued)

= 3V, I

OUT

Typ Limit

(Note 4) (Note 5)

=1A 76 %

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 LM2590HV-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) 1.9 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)

= 1A (Note 8) (Note 9) 0.95 V

OUT

1.2/1.3 V(max)

1.3/1.2 A(min)

2.8/3.0 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)

LM2590HV

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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-

LM2590HV

ture Range. Unless otherwise specified, V

Symbol Parameter Conditions LM2590HV-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 LM2590HV 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 LM2590HVS 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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LM2590HV

Typical Performance Characteristics (Circuit of

Figure 1

)

NormalizedOutput Voltage Line Regulation Efficiency

10134702

10134703 10134704

Switch SaturationVoltage Switch Current Limit Dropout Voltage

10134705

Operating

Quiescent Current Shutdown Quiescent Current

10134708 10134709

10134706

10134707

Minimum Operating

Supply Voltage

10134710

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Typical Performance Characteristics (Circuit of

Figure 1

) (Continued)

LM2590HV

Feedback Pin Bias Current Flag Saturation Voltage Switching Frequency

Soft-start

10134711

10134712

Shutdown /Soft-start

Current Delay Pin Current

10134713

Soft-start Response

10134714

10134718

10134715

10134716

Shutdown/Soft-start

Threshold Voltage Internal Gain-Phase Characteristics

10134753

10134778

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National Semiconductor LM2590HV 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

LM2590HV-3.3 Electrical Characteristics

LM2590HV-5.0 Electrical Characteristics

LM2590HV-ADJ Electrical Characteristics

All Output Voltage Versions Electrical Characteristics

Typical Performance Characteristics (Circuit of