Product Summary

The LM2574HVM-12 regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. The LM2574HVM-12 is 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 LM2574HVM-12 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 LM2574HVM-12 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

Parametrics

LM2574HVM-12 absolute maximum ratings: (1)Maximum Supply Voltage: 63V; (2)ON /OFF Pin Input Voltage: -0.3V ≤ V ≤ +VIN; (3)Output Voltage to Ground: -1V; (4)Minimum ESD Rating: 2kV; (5)Storage Temperature Range: -65℃ to +150℃; (6)Lead Temperature: 260℃; (7)Maximum Junction Temperature: 150℃; (8)Power Dissipation: Internally Limited.

Features

LM2574HVM-12 features: (1)3.3V, 5V, 12V, 15V, and adjustable output versions; (2)Adjustable versiooutput voltage range, 1.23V to 37V (57V for HV version) ±4% max over line and load conditions; (3)Guaranteed 0.5A output current; (4)Wide input voltage range, 40V, up to 60V for HV version; (5)Requires only 4 external components; (6)52 kHz fixed frequency internal oscillator; (7)TTL shutdowcapability, low power standby mode; (8)High efficiency; (9)Uses readily available standard inductors; (10)Thermal shutdowand current limit protection.

Diagrams

LM2574HVM-12 Typical Application

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM2574HVM-12
LM2574HVM-12
National Semiconductor (TI)
Switching Converters, Regulators & Controllers
Data Sheet
0-250: $1.74
250-500: $1.52
500-1000: $1.21
1000-2500: $1.15
LM2574HVM-12/NOPB
LM2574HVM-12/NOPB
National Semiconductor (TI)
Switching Converters, Regulators & Controllers
Data Sheet
0-1: $2.44
1-25: $1.96
25-100: $1.78
100-250: $1.61