Overview
The LM27313XMFX from Texas Instruments is a high-efficiency, 1.6-MHz boost converter integrated circuit designed for a wide range of applications requiring compact and efficient power conversion. This device operates in current-mode control, ensuring fast transient response and high power density. It features a 30-V internal DMOS FET switch, which allows for boosting input voltages from 2.7 V to 14 V to output voltages up to 28 V. The LM27313XMFX is particularly suited for applications where low power consumption and small solution size are critical.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 14 | V |
| Switching Frequency | 1.15 | 1.6 | - | MHz |
| Switch Current Limit | 0.80 | - | 1.25 | A |
| Switch ON Resistance (RDS(ON)) | 500 | - | 650 | mΩ |
| Shutdown Current | - | - | < 1 µA | - |
| Junction Temperature Range | -40 | - | 125 | °C |
| Package Type | - | - | SOT-23 (5-pin) | - |
Key Features
- High switching frequency of 1.6 MHz, allowing for the use of small inductors and capacitors.
- 30-V internal DMOS FET switch with low RDS(ON) for minimal losses.
- Wide input voltage range from 2.7 V to 14 V.
- Logic-level shutdown pin for low power consumption.
- Internally compensated control loop, eliminating the need for additional external components.
- Cycle-by-cycle current limiting and thermal shutdown for protection.
- Small 5-pin SOT-23 package for compact designs.
Applications
- White LED current source.
- PDAs and palm-top computers.
- Digital cameras.
- Portable phones, games, and media players.
- GPS devices.
Q & A
- What is the switching frequency of the LM27313XMFX? The switching frequency is 1.6 MHz.
- What is the input voltage range of the LM27313XMFX? The input voltage range is from 2.7 V to 14 V.
- What is the maximum switch current limit of the LM27313XMFX? The maximum switch current limit is 1.25 A.
- What type of package does the LM27313XMFX come in? The LM27313XMFX comes in a 5-pin SOT-23 package.
- Does the LM27313XMFX have built-in protection features? Yes, it features cycle-by-cycle current limiting and thermal shutdown.
- What is the purpose of the shutdown pin on the LM27313XMFX? The shutdown pin allows for logic-level shutdown to reduce quiescent current and extend battery life.
- What are the thermal limits for the LM27313XMFX? The junction temperature range is from -40°C to 125°C.
- Can the LM27313XMFX be used in automotive applications? Yes, the LM27313-Q1 version is AEC-Q100 Grade 1 Qualified.
- How does the LM27313XMFX achieve high power density? It achieves high power density through the use of small inductors and capacitors enabled by its high switching frequency.
- What type of capacitors are recommended for use with the LM27313XMFX? Ceramic capacitors with X5R or X7R dielectric types are recommended.
