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 1A 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, IQ typically 90 A
` High Efficiency
` Thermal shutdown and current limit protectionApplication· Simple high-efficiency step-down (buck) regulator
· Efficient pre-regulator for linear regulators
· On-card switching regulators
· Positive to Negative converter
Note: † Patent Number 5,382,918Specifications
| Output Current |
1000 mA |
| Input Min Voltage |
4.5 Volt |
| Input Max Voltage |
60 Volt |
| Output Min |
3.3, 1.23, 5 Volt |
| Output Max |
57, 3.3, 5 Volt |
| Frequency Min |
150 kHz |
| Frequency Max |
150 kHz |
| Efficiency (peak) |
77, 76, 82 % |
| On/Off Pin |
Yes |
| Error Flag |
Yes |
| SoftStart |
Yes |
| Sync Pin |
No |
| Inverting |
No |
| Flyback |
No |
| RegType |
Switching Regulator |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Adjustable Output |
Yes, No |
| Adj Switch Frequency |
No |
| PWM Mode |
Voltage |
| Topology |
Buck |
| Special Features |
SIMPLE SWITCHER regulator, error output delay |
| Step-Down |
Yes |
| Multiple Output Capability |
No |
| Output Power |
Undefined Watt |
| Output Voltage |
3.3, Undefined, 5 Volt |
| Output Range |
5V, 3.3V, 1.23V to 57V |
| Switching Frequency |
150 kHz |
| Regulator Family |
SIMPLE SWITCHER |
| AEC Q-100 Automotive Grade |
Undefined |
| Synchronous Rectification |
No |
| View Using Catalog |
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Maximum Supply Voltage (VIN)................................... 63V
SD /SS Pin Input Voltage (Note 2)................................ 6V
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 to +150
ESD Susceptibility
Human Body Model (Note 3) .....................................2 kV
Lead Temperature
S Package
Vapor Phase (60 sec.).......................................... +215
Infrared (10 sec.) ..................................................+245
T Package (Soldering, 10 sec.) ..............................+260
Maximum Junction Temperature +150DescriptionThe 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 with additional supervisory and performance features.
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 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 ±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 90µA 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.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LM2590HVS-3.3 |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVS-5.0 |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVS-ADJ |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVSX-3.3 |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVSX-5.0 |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVSX-ADJ |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVT-3.3 |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVT-5.0 |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
| LM2590HVT-ADJ |
LB300 |
0 |
32249 |
0 |
0 |
3406500 |
2 |
966603676 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
Design Tools
| Title |
Size in Kbytes |
Date |
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| SimpleSwitcher® DC-DC Converters Design Software |
12 Kbytes |
11-Jan-2008 |
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LM2590HV Data Sheet
