LM2576S-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2576S-12/NOPB is a Texas Instruments SIMPLE SWITCHER step-down voltage regulator operating in the TO-263 (D2PAK) surface-mount package. It provides a fixed 12 V output with a maximum load current of 3 A. The device accepts an input voltage range from 4 V to 40 V and operates at a switching frequency of 52 kHz. It features internal feedback for ±4% output voltage tolerance over line and load conditions, thermal shutdown protection, and current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic buck converter topology designed for high-efficiency DC-DC step-down conversion
• Fixed 12 V output option eliminates external resistor divider requirements for standard voltage rails
• Built-in thermal shutdown and cycle-by-cycle current limiting ensure robust operation under fault conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for distributed power architectures
• Pre-regulator stages for downstream switching regulators
• Battery-powered systems requiring efficient voltage stepping

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer specifications. Confirm the 'S' designation corresponds to the TO-263 surface-mount package variant rather than through-hole options. Cross-reference the specific datasheet revision to ensure pinout and electrical characteristics match the design requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required with up to 3 A load capability. The TO-263 package offers superior thermal dissipation compared to smaller SMD packages. Ensure the input voltage does not exceed the 40 V absolute maximum rating. Consider the 52 kHz switching frequency for inductor selection and EMI management.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2576 series of SIMPLE SWITCHER regulators, which are widely used for replacing linear regulators to reduce heat generation. The 'S' indicates the surface-mount D2PAK package, while '12' denotes the fixed 12 V output version. It is distinct from the adjustable ADJ variant and the high-voltage HV series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2576T-12/NOPB (Through-hole equivalent)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2576S-12/NOPB?

The maximum input voltage is 40 V.

Does the LM2576S-12/NOPB require external feedback resistors?

No, it has a fixed 12 V output and does not require external feedback resistors.