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- Model
- LM2577
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- Industrial
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- 4
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- Last added
- 2012-04-01
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National Semiconductor LM1577/LM2577 Step-Up Voltage Regulator Datasheet
The LM1577 and LM2577 are monolithic integrated circuits that provide power and control functions for step‑up (boost), flyback, and forward converter switching regulators. They are offered in 12 V, 15 V, and adjustable output versions and require few external components.
The document includes ordering information, absolute maximum ratings, electrical characteristics, thermal parameters, and physical dimensions, along with application notes for boost, flyback, and multiple‑output regulator designs.
National Semiconductor LM2577 specifications
| Output voltage versions | 12 V, 15 V, Adjustable |
|---|---|
| Oscillator frequency | 52 kHz |
| NPN switch current | 3.0 A |
| Input voltage range | 3.5 V to 40 V |
| Output switch voltage rating | 65 V |
Source: National Semiconductor LM1577/LM2577 Step-Up Voltage Regulator Datasheet
All National Semiconductor LM2577 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- National Semiconductor LM1577/LM2577 Step-Up Voltage Regulator Datasheet 31 p
- National Semiconductor LM1577/LM2577 Series Step-Up Voltage Regulator Datasheet 27 p
- National Semiconductor LM1577/LM2577 Series Datasheet 27 p
- National Semiconductor LM1577/LM2577 Simple Switcher Step-Up Voltage Regulator Datasheet 31 p
Questions answered in these manuals
What is the oscillator frequency of the LM1577/LM2577?
The devices use a 52 kHz fixed‑frequency internal oscillator.
From: National Semiconductor LM1577/LM2577 Step-Up Voltage Regulator Datasheet
What is the maximum output switch voltage rating?
The output switch can tolerate up to 65 V.
From: National Semiconductor LM1577/LM2577 Step-Up Voltage Regulator Datasheet
What is the oscillator frequency of the LM1577/LM2577?
The internal oscillator runs at a fixed 52 kHz.
From: National Semiconductor LM1577/LM2577 Series Step-Up Voltage Regulator Datasheet
What input voltage range do these regulators support?
They operate with an input voltage from 3.5 V up to 40 V.
From: National Semiconductor LM1577/LM2577 Series Step-Up Voltage Regulator Datasheet
What is the internal oscillator frequency of the LM1577/LM2577?
The device uses a fixed‑frequency oscillator operating at 52 kHz.
What input voltage range can the LM1577/LM2577 handle?
It accepts an input voltage from 3.5 V up to 40 V.