(China (Mainland))
Product Summary
The LM2673S-ADJ is a step-down (buck) switching regulator. The device is monolithic integrated circuits which provides all of the active functions for a regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The LM2673S-ADJ consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version. The applications of the LM2673S-ADJ include Simple to design, high efficiency (>90%) step-down switching regulators, Efficient system pre-regulator for linear voltage regulators, Battery chargers.
Parametrics
LM2673S-ADJ absolute maximum ratings: (1)nput Supply Voltage: 45V; (2)Softstart Pin Voltage: -0.1V to 6V; (3)Switch Voltage to Ground: -1V to VIN; (4)Boost Pin Voltage: VSW +8V; (5)Feedback Pin Voltage: -0.3V to 14V; (6)Power Dissipation: Internally Limited; (7)ESD: 2 kV; (8)Storage Temperature Range: -65℃ to 150℃; (9)Soldering Temperature, Wave: 4 sec, 260℃; Infrared: 10 sec, 240℃; Vapor Phase: 75 sec, 219℃.
Features
LM2673S-ADJ features: (1)Efficiency up to 94%; (2)Simple and easy to design with (using off-the-shelf external components); (3)Resistor programmable peak current limit over a range of 2A to 5A; (4)150 m DMOS output switch; (5)3.3V, 5V and 12V fixed output and adjustable (1.2V to 37V ) versions; (6)±2% maximum output tolerance over full line and load conditions; (7)Wide input voltage range: 8V to 40V; (8)260 KHz fixed frequency internal oscillator; (9)Softstart capability; (10)-40 to +125℃ operating junction temperature range.
Diagrams
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 LM2673S-ADJ |
National Semiconductor (TI) |
Switching Converters, Regulators & Controllers |
Data Sheet |
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LM2673S-ADJ/NOPB |
National Semiconductor (TI) |
Switching Converters, Regulators & Controllers 3A STEP-DOWN VLTG REG |
Data Sheet |
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