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.
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 |
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.
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