Model No: LM3671MFX-ADJ/NOPB
Texas Instruments LM3671MFX-ADJ/NOPB
Manufacturer: Texas Instruments
SEMICON NO.: LM3671MFX-ADJ/NOPB
Package: SC-74A, SOT-753
Stock: In stock
Description: Buck Switching Regulator IC 2MHz 600mA
SEMICON NO.: LM3671MFX-ADJ/NOPB
Package: SC-74A, SOT-753
Stock: In stock
Description: Buck Switching Regulator IC 2MHz 600mA
Quantity :
| Mfr | Texas Instruments |
| Device Type | Synchronous Step-Down (Buck) DC-DC Converter |
| Topology | Buck (Step-Down), Synchronous Rectification |
| Number of Outputs | 1 |
| Output Type | Adjustable |
| Input Voltage | 2.7 V to 5.5 V |
| Output Voltage | 1.1 V to 3.3 V |
| Output Current (Max) | 600 mA |
| Switching Frequency | 2 MHz (Fixed, PWM mode) |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Temperature | –40°C to +85°C |
| Package | SC-74A, SOT-753 |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
LM3671MFX-ADJ/NOPB - 2 MHz 600 mA Adjustable Step-Down DC-DC Converter (SOT-23-5)
The LM3671MFX-ADJ/NOPB is a 2 MHz, 600 mA adjustable step-down DC-DC converter from Texas Instruments, optimized for powering low-voltage circuits from a single Li-Ion cell or any 2.7 V to 5.5 V input rail. Housed in a compact SOT-23-5 (DBV), it supplies up to 600 mA across the full input range and programs its output from 1.1 V to 3.3 V through an external resistor divider referred to an internal 0.5 V reference. It switches automatically between PWM low-noise and PFM low-current modes, holding a fixed 2 MHz frequency for tiny external parts and cutting quiescent current to 16 uA in PFM to extend battery life. Internal synchronous rectification adds efficiency, soft start limits inrush, and current-overload plus thermal-shutdown protection safeguard the load. Shutdown current is 0.01 uA and the part is rated -40 C to +85 C.
Applications
● Mobile phones and similar portable systems powered by a single Li-Ion cell.
● PDAs, handheld computers and portable instruments.
● MP3 players, portable media players and WLAN modules.
● Digital still cameras and portable hard-disk drives.
● Portable medical equipment and handheld transaction terminals.
● Wireless home-automation equipment and battery-backed accessories.
● Automotive electronics through the AEC-Q100 qualified LM3671-Q1 variant.
Frequently Asked Questions
Q: How is the output voltage programmed?
A: A divider from VOUT to FB to GND is used; VOUT regulates so the FB node sits at 0.5 V.
Q: What is the maximum output current?
A: Up to 600 mA over the whole 2.7 V to 5.5 V input range, subject to thermal limits.
Q: What precautions apply?
A: Keep divider current low (R2 = 200 kOhm), add a compensation zero near 45 kHz, and never leave EN floating.
The LM3671MFX-ADJ/NOPB is a 2 MHz, 600 mA adjustable step-down DC-DC converter from Texas Instruments, optimized for powering low-voltage circuits from a single Li-Ion cell or any 2.7 V to 5.5 V input rail. Housed in a compact SOT-23-5 (DBV), it supplies up to 600 mA across the full input range and programs its output from 1.1 V to 3.3 V through an external resistor divider referred to an internal 0.5 V reference. It switches automatically between PWM low-noise and PFM low-current modes, holding a fixed 2 MHz frequency for tiny external parts and cutting quiescent current to 16 uA in PFM to extend battery life. Internal synchronous rectification adds efficiency, soft start limits inrush, and current-overload plus thermal-shutdown protection safeguard the load. Shutdown current is 0.01 uA and the part is rated -40 C to +85 C.
Applications
● Mobile phones and similar portable systems powered by a single Li-Ion cell.
● PDAs, handheld computers and portable instruments.
● MP3 players, portable media players and WLAN modules.
● Digital still cameras and portable hard-disk drives.
● Portable medical equipment and handheld transaction terminals.
● Wireless home-automation equipment and battery-backed accessories.
● Automotive electronics through the AEC-Q100 qualified LM3671-Q1 variant.
Frequently Asked Questions
Q: How is the output voltage programmed?
A: A divider from VOUT to FB to GND is used; VOUT regulates so the FB node sits at 0.5 V.
Q: What is the maximum output current?
A: Up to 600 mA over the whole 2.7 V to 5.5 V input range, subject to thermal limits.
Q: What precautions apply?
A: Keep divider current low (R2 = 200 kOhm), add a compensation zero near 45 kHz, and never leave EN floating.
Alternative and Equivalent Buck Converter Models
● LM3671MFX-1.8/NOPB - the fixed 1.8 V version in SOT-23-5 for designs that need no external divider.
● LM3671LC-ADJ/NOPB - the 6-USON option for space-constrained, low-profile layouts.
● LM3671-Q1 - the AEC-Q100 Grade 1 automotive variant rated -40 C to +125 C for harsh environments.
● TPS62230 - a 2 MHz ultra-small step-down converter with DCS-Control in a 1 x 1.5 mm SON for new designs.
● TPS62671 - a 500 mA, 6 MHz high-efficiency step-down converter in CSP for an even smaller total BOM.
● LM3671MFX-1.8/NOPB - the fixed 1.8 V version in SOT-23-5 for designs that need no external divider.
● LM3671LC-ADJ/NOPB - the 6-USON option for space-constrained, low-profile layouts.
● LM3671-Q1 - the AEC-Q100 Grade 1 automotive variant rated -40 C to +125 C for harsh environments.
● TPS62230 - a 2 MHz ultra-small step-down converter with DCS-Control in a 1 x 1.5 mm SON for new designs.
● TPS62671 - a 500 mA, 6 MHz high-efficiency step-down converter in CSP for an even smaller total BOM.
