Overview
The LM2734YQMK/NOPB is a high-performance, automotive-grade step-down DC/DC converter produced by Texas Instruments. This device is designed to operate within a wide input voltage range of 3 V to 20 V and can deliver up to 1 A of output current. It features a compact 6-pin Thin SOT-23 package, making it ideal for applications where space is limited. The LM2734YQMK/NOPB is built using state-of-the-art 0.5-µm BiCMOS technology, ensuring high power density and efficient operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3 to 20 | V |
| Output Current (Max) | 1 | A |
| Output Voltage Range | 0.8 to 18 | V |
| Switching Frequency (LM2734Y) | 550 kHz | kHz |
| Switching Frequency (LM2734X) | 1.6 MHz | kHz |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | Thin SOT-23-6 | |
| Package Body Size | 2.90 mm x 1.60 mm | mm |
| Control Mode | Current-Mode, PWM | |
| Switch ON Resistance | 300 mΩ | mΩ |
| Quiescent Current (Switching) | 1.5 mA | mA |
| Quiescent Current (Shutdown) | 30 nA | nA |
Key Features
- High Efficiency: Achieves efficiencies up to 90% over a wide range of operating conditions.
- Compact Package: 6-pin Thin SOT-23 package, ideal for space-constrained applications.
- Internal Soft Start: Reduces inrush current during startup.
- Current Limiting: Cycle-by-cycle current limiting to protect the output switch.
- Thermal Shutdown: Protects against overheating by turning off the output switch when the junction temperature exceeds 165°C.
- Output Overvoltage Protection: Turns off the internal NMOS control switch if the output voltage exceeds 10% above the internal reference voltage.
- Undervoltage Lockout (UVLO): Prevents operation until the input voltage exceeds 2.74 V, with hysteresis to prevent oscillation during power-up.
- External Shutdown: Features an ultra-low standby current of 30 nA when in shutdown mode.
Applications
- Automotive Systems: Suitable for various automotive applications due to its automotive-grade temperature range and robust features.
- Local Point-of-Load Regulation: Ideal for providing local DC/DC conversion in a variety of systems.
- Advanced Driver Assistance Systems (ADAS): Can be used in ADAS systems that require high reliability and efficiency.
Q & A
- What is the input voltage range of the LM2734YQMK/NOPB?
The input voltage range is from 3 V to 20 V.
- What is the maximum output current of the LM2734YQMK/NOPB?
The maximum output current is 1 A.
- What are the switching frequencies for the LM2734Y and LM2734X versions?
The LM2734Y switches at 550 kHz, and the LM2734X switches at 1.6 MHz.
- What is the operating temperature range of the LM2734YQMK/NOPB?
The operating temperature range is from -40°C to 125°C.
- What type of control mode does the LM2734YQMK/NOPB use?
The device uses current-mode, PWM control.
- What is the switch ON resistance of the LM2734YQMK/NOPB?
The switch ON resistance is 300 mΩ.
- Does the LM2734YQMK/NOPB have internal soft start and current limiting features?
Yes, it includes internal soft start and cycle-by-cycle current limiting features.
- How does the thermal shutdown feature work in the LM2734YQMK/NOPB?
The thermal shutdown turns off the output switch when the junction temperature exceeds 165°C and remains off until the temperature drops to approximately 150°C.
- What is the quiescent current in shutdown mode for the LM2734YQMK/NOPB?
The quiescent current in shutdown mode is typically 30 nA.
- Can the LM2734YQMK/NOPB be used in automotive applications?
Yes, it is suitable for automotive applications due to its automotive-grade specifications and features.
