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- Model
- LM22673
- Industry
- Industrial
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- 3
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- Last added
- 2012-05-09
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National Semiconductor LM22673 Datasheet
The LM22673 series from National Semiconductor provides a monolithic step‑down (buck) regulator capable of delivering up to 3 A with high efficiency (>90%). It features a fixed 5 V output version and an adjustable version that can be set as low as 1.285 V. The device integrates a low‑ON‑resistance N‑channel MOSFET, internal voltage‑mode control, thermal shutdown, and current limiting, all selectable with a few external components.
The regulator is offered in TO‑263 THIN and PSOP‑8 exposed‑pad packages and operates over a wide input range of 4.5 V to 42 V. Design support is provided through National’s Webench® tools, and the part includes adjustable soft‑start and programmable current‑limit resistors for flexible application in industrial, automotive, telecom and embedded systems.
National Semiconductor LM22673 specifications
| Input voltage range | 4.5 V to 42 V |
|---|---|
| Maximum output current | 3 A |
| Switching frequency | 500 kHz (fixed) |
| Efficiency | >90 % |
| Operating temperature range | -40 °C to 125 °C |
| Adjustable soft‑start | Yes (external capacitor) |
| Adjustable current limit | Yes (external resistor on IADJ pin) |
All National Semiconductor LM22673 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the switching frequency of the LM22673?
The regulator operates at a fixed switching frequency of 500 kHz.
What input voltage range can the LM22673 handle?
It accepts an input voltage from 4.5 V up to 42 V.
What is the input voltage range of the LM22673?
The device operates with an input voltage from 4.5 V up to 42 V.
From: NATIONAL SEMICONDUCTOR M29F040 4 Mbit (512Kb x8 Uniform Block) Single Supply Flash Memory handbook
What is the maximum output current the LM22673 can deliver?
It can supply up to 3 A of output current.
From: NATIONAL SEMICONDUCTOR M29F040 4 Mbit (512Kb x8 Uniform Block) Single Supply Flash Memory handbook
What is the input voltage range of the LM22673?
The LM22673 operates from 4.5 V up to 42 V input.
From: National Semiconductor LM22673 Step-Down Voltage Regulator Datasheet
What is the maximum output current the device can supply?
It can drive loads of up to 3 A.
From: National Semiconductor LM22673 Step-Down Voltage Regulator Datasheet