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LM2574HVN-ADJ ; Step-Down Voltage Regulator 0.5A, DIP-8

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Contact on 07707857302 or e-mail
0.50 Grams

Product 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.

Features :

- 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.

Applications :

- Simple high-efficiency step-down (buck) regulator

- Efficient pre-regulator for linear regulators

- On-card switching regulators

- Positive to negative converter (Buck-Boost



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