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LM2674 Buck Regulator
LM2674
Texas Instrumentspower regulator
The LM2674 is a high-efficiency buck regulator capable of delivering up to 500mA, with adjustable or fixed output voltages from 3V to 12V.
In stock
Specifications
8- Operating Voltage
- 45V
- Supply Current
- 2.5mA to 3.6mA (3.3V, 5V, adjustable versions) mA
- Interface
- GPIO, ADC, PWM, GND
- Resolution
- ±1.5% %
- Range
- 3V to 40V (input), 1.21V to 37V (output)
- Accuracy
- ±1.5% maximum output voltage tolerance over line and load conditions %
- Temperature Range
- -40°C to 125°C
- Package
- 8-pin SOIC, PDIP, 16-pin WSON
Pinout
6| Pin | Name | Functions | Notes |
|---|---|---|---|
| CB | Bootstrap capacitor connection | GPIO | Connect a high-quality, 10-nF capacitor from CB to VSW. |
| FB | Feedback sense input pin | ADC | Connect to the midpoint of feedback divider to set VOUT for ADJ version or connect this pin directly to the output capacitor for a fixed output version. |
| ON/OFF | Enable input to the voltage regulator | GPIO | High = ON and low = OFF. Pull this pin high or float to enable the regulator. |
| VSW | Source pin of the internal high-side FET | PWM | Attached this pin to an inductor and the cathode of the external diode. |
| GND | Power ground pins | GND | Connect to system ground. Ground pins of CIN and COUT. Path to CIN must be as short as possible. |
| VIN | Supply input pin to collector pin of high-side FET | POWER | Connect to power supply and input bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and GND must be as short as possible. |
Interactive pinout
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LM2674
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