| Part Number(s) (NSID) |
Top View | Type | Pins | MSL Rating | Peak Reflow | RoHS Status |
CAD Symbols | Models | Package Marking Format |
|---|---|---|---|---|---|---|---|---|---|
| LM2574HVM-12/NOPB LM2574HVM-12 |
 |
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -12 P+ |
| LM2574HVM-15/NOPB LM2574HVM-15 |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -15 P+ |
| LM2574HVM-3.3/NOPB LM2574HVM-3.3 |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -3.3 P+ |
| LM2574HVM-5.0/NOPB LM2574HVM-5.0 |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -5.0 P+ |
| LM2574HVM-ADJ/NOPB LM2574HVM-ADJ |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -ADJ P+ |
| LM2574HVMX-12/NOPB |
|
SOIC WIDE | 14 | 3 | 260 | Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -12 P+ |
| LM2574HVMX-15/NOPB LM2574HVMX-15 |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -15 P+ |
| LM2574HVMX-3.3/NOPB LM2574HVMX-3.3 |
|
SOIC WIDE | 14 | 4 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -3.3 P+ |
| LM2574HVMX-5.0/NOPB LM2574HVMX-5.0 |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -5.0 P+ |
| LM2574HVMX-ADJ/NOPB LM2574HVMX-ADJ |
|
SOIC WIDE | 14 | 3 2A |
260 220 |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVM -ADJ P+ |
| LM2574HVN-12/NOPB LM2574HVN-12 |
 |
MDIP | 8 | 1 1 |
NA NA |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVN -12 P+ |
| LM2574HVN-15/NOPB LM2574HVN-15 |
|
MDIP | 8 | 1 1 |
NA NA |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVN -15 P+ |
| LM2574HVN-5.0/NOPB LM2574HVN-5.0 |
|
MDIP | 8 | 1 1 |
NA NA |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVN -5.0 P+ |
| LM2574HVN-ADJ/NOPB LM2574HVN-ADJ |
|
MDIP | 8 | 1 1 |
NA NA |
Detail | N/A | N/A |
NSUZXYTTE# LM2574HVN -ADJ P+ |
PDF
Description
The LM2574 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.
The LM2574 series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed.
A standard series of inductors optimized for use with the LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
| • | Simple high-efficiency step-down (buck) regulator |
| • | Efficient pre-regulator for linear regulators |
| • | On-card switching regulators |
| • | Positive to negative converter (Buck-Boost) |
| • | 3.3V, 5V, 12V, 15V, and adjustable output versions |
| • | Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±4% max over line and load conditions |
| • | Guaranteed 0.5A output current |
| • | Wide input voltage range, 40V, up to 60V for HV version |
| • | Requires only 4 external components |
| • | 52 kHz fixed frequency internal oscillator |
| • | TTL shutdown capability, low power standby mode |
| • | High efficiency |
| • | Uses readily available standard inductors |
| • | Thermal shutdown and current limit protection |
Diagrams
Typical Application
|
Block Diagram
|
Typical Performance  |
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