Overview
The LM3671MFX-3.3 is a 2-MHz, 600-mA step-down DC-DC converter produced by Texas Instruments. This device is optimized for powering low-voltage circuits from a single Li-Ion cell battery or input voltage rails ranging from 2.7 V to 5.5 V. It provides up to 600-mA load current across the entire input voltage range. The LM3671MFX-3.3 is specifically configured to output a fixed voltage of 3.3 V, making it suitable for various portable and mobile applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 to 5.5 | V |
| Output Voltage | 3.3 | V |
| Maximum Load Current | 600 | mA |
| Switching Frequency | 2 MHz (typical) | |
| Quiescent Current | 16 µA (typical) | |
| Shutdown Current | 0.01 µA (typical) | |
| Ambient Operating Temperature Range | -40°C to +125°C | |
| Package Options | USON (6-pin), SOT-23 (5-pin), DSBGA (5-pin) |
Key Features
- AEC Q100-qualified for automotive applications with an ambient operating temperature range of -40°C to +125°C.
- Automatic PFM-PWM mode switching for improved system control and efficiency.
- Internal synchronous rectification for high efficiency during PWM mode operation.
- Internal soft start and current overload and thermal shutdown protection.
- Operates from a single Li-Ion cell battery.
- Requires only three tiny surface-mount external components: one inductor and two ceramic capacitors.
Applications
- Mobile phones
- PDAs
- MP3 players
- W-LAN devices
- Portable instruments
- Digital still cameras
- Portable hard disk drives
- Automotive systems
- Portable medical equipment
- Handheld transaction terminals
- Wireless home-automation equipment
Q & A
- What is the input voltage range of the LM3671MFX-3.3?
The input voltage range is from 2.7 V to 5.5 V.
- What is the fixed output voltage of the LM3671MFX-3.3?
The fixed output voltage is 3.3 V.
- What is the maximum load current of the LM3671MFX-3.3?
The maximum load current is 600 mA.
- What is the typical switching frequency of the LM3671MFX-3.3?
The typical switching frequency is 2 MHz.
- What is the quiescent current of the LM3671MFX-3.3 in PFM mode?
The quiescent current is typically 16 µA.
- What is the shutdown current of the LM3671MFX-3.3?
The shutdown current is typically 0.01 µA.
- What are the package options available for the LM3671MFX-3.3?
The package options include USON (6-pin), SOT-23 (5-pin), and DSBGA (5-pin).
- Is the LM3671MFX-3.3 qualified for automotive applications?
Yes, it is AEC Q100-qualified for automotive applications.
- What protection features does the LM3671MFX-3.3 have?
The device has current overload and thermal shutdown protection.
- How many external components are required for the LM3671MFX-3.3?
Only three external components are required: one inductor and two ceramic capacitors.
