Overview
The LM2623AMMX/NOPB is a high-efficiency, general-purpose, step-up DC-DC switching regulator produced by Texas Instruments. This device is designed for battery-powered and low-input voltage systems, offering a wide range of applications due to its adjustable output voltage, operating frequency, and duty cycle. The LM2623 can boost an input voltage between 0.8 V and 14 V to a regulated output voltage between 1.24 V and 14 V, making it suitable for various portable and low-power devices.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 0.8 V to 14 V |
| Output Voltage Range | 1.24 V to 14 V |
| Switching Frequency | 300 kHz to 2 MHz |
| Maximum Load Current | Up to 2 A at low output voltages |
| Internal MOSFET Resistance | 0.17 Ω |
| Efficiency | Up to 90% |
| Operating Current (VDD Pin) | 80 µA typical |
| Shutdown Current | < 2.5 µA |
| Package Options | 8-Pin VSSOP, 4-mm × 4-mm Thermally Enhanced WSON |
| Package Height | 1.09 mm (VSSOP) |
Key Features
- High-efficiency gated-oscillator topology
- Adjustable output voltage, operating frequency, and duty cycle
- Low voltage start-up from 1.1 V
- Built-in peak switch current limit and thermal protection circuitry
- Ultra-low quiescent current for maximum battery life
- Active-low shutdown input (EN pin)
- Small footprint packages (VSSOP and WSON)
Applications
- Cameras, pagers, and cell phones
- PDAs, palmtop computers, and GPS devices
- White LED drive, TFT, or scanned LCDs
- Flash memory programming
- Hand-held instruments
- 1, 2, 3, or 4 cell alkaline systems
- 1, 2, or 3 cell lithium-ion systems
Q & A
- What is the input voltage range of the LM2623AMMX/NOPB? The input voltage range is from 0.8 V to 14 V.
- What is the output voltage range of the LM2623AMMX/NOPB? The output voltage range is from 1.24 V to 14 V.
- What is the maximum load current of the LM2623AMMX/NOPB? The maximum load current is up to 2 A at low output voltages.
- How can the switching frequency of the LM2623AMMX/NOPB be adjusted? The switching frequency can be adjusted using an external resistor connected to the FREQ pin.
- What is the typical operating current of the LM2623AMMX/NOPB? The typical operating current is 80 µA.
- How does the LM2623AMMX/NOPB enter shutdown mode? The device enters shutdown mode when the logic input to the EN pin is pulled below 0.15 VDD.
- What are the package options for the LM2623AMMX/NOPB? The package options include 8-Pin VSSOP and 4-mm × 4-mm Thermally Enhanced WSON.
- What is the minimum start-up voltage for the LM2623AMMX/NOPB? The minimum start-up voltage is 1.1 V.
- Does the LM2623AMMX/NOPB have built-in protection features? Yes, it includes built-in peak switch current limit and thermal protection circuitry.
- What are some typical applications of the LM2623AMMX/NOPB? Typical applications include cameras, cell phones, PDAs, GPS devices, and hand-held instruments.
