LM2575-3.3BT

LM2575-3.3BT

Compare
LM2575-3.3BT
52KHZ SIMPLE 1A BUCK REGULATOR
Compare
45
Serves customers in 45 countries
1000+
Worldwide Manufacturers
$140M
$140M Growth in 5 Years
50.0M+
50M Parts Shipped in 5 Years

The LM2575-3.3BT series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3V, 5V, 12V, or 15V fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 1A load with excellent line and load regulation.

These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator.

The LM2575-3.3BT series offers a high efficiency replacement for popular three-terminal adjustable 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 available from several different manufacturers are ideal for use with the LM2575-3.3BT series. This feature greatly simplifies the design of switch-mode power supplies.

The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified input voltages and output load conditions. The oscillator frequency is guaranteed to ±10%. External shutdown is included, featuring less than 200µA standby current. The output switch includes cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.

Feature

  • 3.3V, 5V, 12V, and adjustable output versions
  • Voltage over specified line and load conditions:
    • Fixed version: ±3% max. output voltage
    • Adjustable version: ±2% max. feedback voltage
  • Guaranteed 1A output current
  • Wide input voltage range: 4V to 40V
  • Wide output voltage range: 1.23V to 37V
  • Requires only 4 external components
  • 52kHz fixed frequency internal oscillator
  • Low power standby mode IQ typically < 200µA
  • 80% efficiency (adjustable version typically > 80%)
  • Uses readily available standard inductors
  • Thermal shutdown and current limit protection
  • 100% electrical thermal limit burn-in

Product Attributes

TYPE DESCRIPTION Select all
Voltage - Output (Min/Fixed) 3.3V
Package Bulk
Current - Output 1A
Product Status Obsolete
Frequency - Switching 52kHz
Function Step-Down
Synchronous Rectifier No
Output Configuration Positive
Operating Temperature -40°C ~ 125°C (TJ)
Topology Buck
Mounting Type Through Hole
Output Type Fixed
Package / Case TO-220-5
Number of Outputs 1
Supplier Device Package TO-220-5
Voltage - Input (Min) 4V
Voltage - Input (Max) 40V

$0.90

Price update:a months ago
Available in stock: 1287
Microchip Technology

Microchip Technology

Microchip Technology Inc., headquartered in Chandler, Arizona, leads in microcontrollers and analog semiconductors, facilitating diverse global applications with innovative solutions, low-risk development, and dependable quality assurance.

View All Product from Microchip Technology

Blog