LM2577T-ADJ Adjustable Step-Up Switching Regulator 3A
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Prices updated: 13 Oct 2026
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About this product
The LM2577T-ADJ is an adjustable step-up (boost) switching regulator from Texas Instruments' SIMPLE SWITCHER family, rated for 3 A output. It is not a linear regulator; it raises a lower DC input voltage to a higher, regulated output using an external inductor and diode.
Specifications
- Regulator type
- Step-up (boost) switching regulator
- Output voltage range
- 1.23 V to 57 V (adjustable)
- Output current
- 3 A
- Maximum voltage rating
- 63 V
- Family
- SIMPLE SWITCHER
Frequently asked questions
How do I set the output voltage?
Use a resistor divider from the output to the feedback pin, with the feedback reference of 1.23 V. The output is Vout = 1.23 × (1 + R2/R1), where R2 is between output and feedback and R1 is between feedback and ground, per the datasheet.
Is it a linear regulator?
No. Despite being listed under linear regulators in some catalogues, the LM2577 is a switching step-up converter. It requires an external inductor, catch diode and input/output capacitors as specified in the datasheet.
