LM1575/LM2575/LM2575HV Simple Switcher 1A Step Down Voltage Regulator LM2575SX-ADJ/NOPB

FEATURES Connection Diagrams

(XX indicates output voltage option.)

• 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

• Specified 1A 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

• P + Product Enhancement Tested

APPLICATIONS

• Simple High-Efficiency Step-Down (Buck)

Regulator

• Efficient Pre-Regulator for Linear Regulators

• On-Card Switching Regulators

• Positive to Negative Converter (Buck-Boost)

DESCRIPTION

The LM2575 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, 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 LM2575 series offers a high-efficiency

replacement for popular three-terminal linear

regulators. It substantially reduces the size of the

heat sink, and in many cases no heat sink is

required.

A standard series of inductors optimized for use with

the LM2575 are available from several different

manufacturers. This feature greatly simplifies the

design of switch-mode power supplies.

Other features include a specified ±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.

King--- Originator of ANTERWELL, engaged in the IC electronics industry in 1998 and establish ANTERWELL in 2004. The company is located in Shenzhen Huaqiang North, the largest electronic center in Asia. Our main business is the technical development and electronic products import and export business. Currently, we have branches in Hong Kong and Malaysia.

Up to now. ANTERWELL have more than 1,000,000 types of electronic components in stock. ANTERWELL has become one of the top choices for purchasing IC chips both domestically and internationally. King is a senior IC chip expert, sales engineer, and mentor, leading an elite team with customer first, quality first, honesty, trustworthiness, and mutual benefit. We look forward to cooperate with you to create a better future!

ANTERWELL’s main products include semiconductors, resistors, capacitors, diodes, inductors, connectors, transistors, sensors, etc. Involving the major well-known brands such like: TI, XILINX, FAIRCHILD, STM, MICRON, MICROCHIP, TDK, SAMSUNG, ON, NXP,IR,ADI, ATMEL,VISHAY,LINEAR etc.

ANTERWELL adheres to the development concept and purpose of "direct stock offer, excellent quality, favorable price, and sincere service", which is deeply recognized by domestic and foreign customers. Based on the long-term development goal, ANTERWELL provides customers with standardized, professional, and diversified high-quality services through a strong market service network. ANTEWRELL has multiple skilled and capable executives with a professional QC team and excellent sales team to win the high support and trust of the vast customer base! We provide the best quality, price and service.

ANTERWELL will be your best Partner.