Overview
The Texas Instruments LM2733YMFX/NOPB is a high-performance boost converter IC designed for applications requiring high efficiency and compact design. This device operates in current-mode control, offering fast transient response and high power density. It is available in a 5-pin SOT-23 package, making it suitable for space-constrained designs. The LM2733YMFX/NOPB features a 40-V internal DMOS FET switch, supporting output voltages up to 40V and input voltages ranging from 2.7V to 14V. It is ideal for various portable and consumer electronics applications where high efficiency and small form factor are critical.
Key Specifications
| Parameter | Description |
|---|---|
| Output Type | Adjustable |
| Output Voltage | 2.7V ~ 40V |
| Output Current | Up to 1A |
| Input Voltage | 2.7V ~ 14V |
| Switching Frequency | 0.6 MHz (Y option), 1.6 MHz (X option) |
| Package | SOT-23-5 |
| Internal FET Switch | 40V DMOS FET |
| Shutdown Current | < 1 µA |
| Protection Features | Cycle-by-cycle current limiting, thermal shutdown |
Key Features
- High Efficiency: The LM2733YMFX/NOPB offers high power conversion efficiency, making it suitable for battery-powered devices.
- High Power Density: The use of a 5-pin SOT-23 package and minimal power loss of the internal switch result in high power density.
- Wide Input Voltage Range: Supports input voltages from 2.7V to 14V.
- Adjustable Output Voltage: Output voltage can be adjusted from 2.7V to 40V.
- Low Shutdown Current: Less than 1 µA shutdown current to extend battery life.
- Internal Compensation: Simplifies design and reduces component count.
- Protection Features: Includes cycle-by-cycle current limiting and thermal shutdown for robust operation.
Applications
- White LED Current Source: Ideal for driving white LEDs in various lighting applications.
- Portable Electronics: Suitable for PDAs, palm-top computers, digital cameras, and portable phones and games.
- Local Boost Regulator: Can be used as a local boost regulator in systems requiring higher voltages than the main supply.
Q & A
- What is the output voltage range of the LM2733YMFX/NOPB?
The output voltage can be adjusted from 2.7V to 40V.
- What are the switching frequencies available for the LM2733YMFX/NOPB?
The device is available in two switching frequency options: 0.6 MHz (Y option) and 1.6 MHz (X option).
- What is the maximum output current of the LM2733YMFX/NOPB?
The maximum output current is up to 1A.
- What is the package type of the LM2733YMFX/NOPB?
The device is packaged in a 5-pin SOT-23 package.
- What protection features does the LM2733YMFX/NOPB have?
The device includes cycle-by-cycle current limiting and thermal shutdown for protection.
- How does the shutdown pin function on the LM2733YMFX/NOPB?
The device can be turned off by pulling the shutdown pin low. If not used, the pin should be tied directly to VIN.
- What type of FET switch is used in the LM2733YMFX/NOPB?
The device uses a 40V DMOS FET switch.
- What is the recommended type of capacitors for use with the LM2733YMFX/NOPB?
Multilayer ceramic capacitors with X5R and X7R dielectric types are recommended.
- What are some typical applications of the LM2733YMFX/NOPB?
Typical applications include white LED current sources, PDAs, palm-top computers, digital cameras, and portable phones and games.
- How does the internal compensation of the LM2733YMFX/NOPB simplify design?
The internal compensation reduces the component count and simplifies the design process.
