Overview
The LMR10510YMF/NOPB is a high-frequency, PWM step-down DC/DC converter produced by Texas Instruments. This regulator is designed to provide efficient and reliable local DC/DC conversion in a compact package. It is available in both SOT-23 and WSON packages, making it suitable for space-constrained applications. The LMR10510 features an internal 130-mΩ PMOS switch, allowing it to drive loads up to 1 A with high power density. The device is internally compensated, which simplifies its use and minimizes the number of external components required.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range | 3 V to 5.5 V |
| Output Voltage Range | 0.6 V to 4.5 V |
| Output Current | Up to 1 A |
| Switching Frequency | 3 MHz (LMR10510Y) |
| Package Type | SOT-23 (DBV), WSON |
| Operating Temperature Range | -40°C to 125°C |
| Switch On Resistance | 130 mΩ (SOT-23), 150 mΩ (WSON) |
| Quiescent Current (Switching) | 4.3 mA to 6.5 mA (LMR10510Y) |
| Quiescent Current (Shutdown) | 30 nA |
| Thermal Shutdown Temperature | 165°C |
Key Features
The LMR10510YMF/NOPB features several key functionalities that make it a robust and efficient DC/DC converter:
- Internal Soft Start: Reduces inrush current by ramping up the output voltage in a controlled manner during startup.
- Output Overvoltage Protection: Protects the device by turning off the internal PMOS switch if the output voltage exceeds 15% above the internal reference voltage.
- Undervoltage Lockout (UVLO): Prevents the device from operating until the input voltage exceeds 2.73 V, with a hysteresis of approximately 430 mV.
- Current Limiting: Cycle-by-cycle current limiting to protect the output switch from excessive current.
- Thermal Shutdown: Limits total power dissipation by turning off the output switch when the IC junction temperature exceeds 165°C.
- Internal Compensation: Simplifies the design by requiring fewer external components.
- Current-Mode PWM Operation: Provides high-performance regulation over a wide range of operating conditions.
Applications
The LMR10510YMF/NOPB is suitable for a variety of applications due to its compact size, high efficiency, and robust features:
- Point-of-Load Conversions: Ideal for converting from 3.3-V and 5-V rails.
- Space-Constrained Applications: Suitable for designs where PCB space is limited.
- Battery-Powered Equipment: Efficient power conversion for battery-powered devices.
- Industrial Distributed Power Applications: Reliable operation in industrial environments.
- Power Meters and Portable Hand-Held Instruments: High accuracy and stability for measurement and portable devices.
Q & A
- What is the input voltage range of the LMR10510YMF/NOPB?
The input voltage range is from 3 V to 5.5 V.
- What is the maximum output current of the LMR10510YMF/NOPB?
The maximum output current is up to 1 A.
- What are the switching frequencies available for the LMR10510YMF/NOPB?
The switching frequency for the LMR10510Y is 3 MHz.
- What type of packages are available for the LMR10510YMF/NOPB?
The device is available in SOT-23 and WSON packages.
- What is the operating temperature range of the LMR10510YMF/NOPB?
The operating temperature range is from -40°C to 125°C.
- Does the LMR10510YMF/NOPB have internal compensation?
- What is the quiescent current in shutdown mode for the LMR10510YMF/NOPB?
The quiescent current in shutdown mode is typically 30 nA.
- What is the thermal shutdown temperature for the LMR10510YMF/NOPB?
The thermal shutdown temperature is 165°C.
- Does the LMR10510YMF/NOPB have overvoltage protection?
- What types of capacitors are recommended for use with the LMR10510YMF/NOPB?
