Overview
The LMR10510XMFE/NOPB from Texas Instruments is a high-frequency, monolithic step-down DC/DC converter. This device is available in 5-pin SOT-23 and 6-pin WSON packages, making it suitable for space-constrained applications. It operates with an input voltage range of 3 V to 5.5 V and can deliver an output voltage from 0.6 V to 4.5 V with a maximum output current of 1 A. The regulator features internal soft-start, current-mode PWM operation, and thermal shutdown, ensuring high-performance regulation and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3 to 5.5 | V |
| Output Voltage Range | 0.6 to 4.5 | V |
| Output Current | Up to 1 | A |
| Switching Frequency | 1.6 MHz (LMR10510X), 3 MHz (LMR10510Y) | MHz |
| Shutdown IQ | 30 nA (typical) | nA |
| Switch On Resistance | 130 mΩ (SOT-23), 150 mΩ (WSON) | mΩ |
| Thermal Shutdown Temperature | 165°C | °C |
| Package | 5-pin SOT-23, 6-pin WSON |
Key Features
- Internal soft-start circuitry to reduce inrush current
- Current-mode PWM operation with internal compensation
- Thermal shutdown to prevent overheating
- Output overvoltage protection
- Undervoltage lockout (UVLO) to prevent operation below minimum input voltage
- Pulse-by-pulse current limit for switch protection
- Low quiescent current in shutdown mode (30 nA typical)
- High efficiency up to 93%
- Compact packaging (SOT-23 and WSON) for space-constrained applications
Applications
- Point-of-load conversions from 3.3-V and 5-V rails
- Space-constrained applications
- Battery-powered equipment
- Industrial distributed power applications
- Power meters
- Portable hand-held instruments
Q & A
- What is the input voltage range of the LMR10510?
The input voltage range is from 3 V to 5.5 V.
- What are the available switching frequencies for the LMR10510?
The switching frequencies are 1.6 MHz (LMR10510X) and 3 MHz (LMR10510Y).
- What is the maximum output current of the LMR10510?
The maximum output current is up to 1 A.
- What are the package options for the LMR10510?
The device is available in 5-pin SOT-23 and 6-pin WSON packages.
- Does the LMR10510 have thermal shutdown protection?
- What is the quiescent current in shutdown mode for the LMR10510?
The quiescent current in shutdown mode is typically 30 nA.
- Does the LMR10510 have output overvoltage protection?
- Can the LMR10510 be used in space-constrained applications?
- What type of capacitors are recommended for use with the LMR10510?
- How does the soft-start feature of the LMR10510 work?
The soft-start feature forces the output voltage to increase at a controlled rate during startup, reducing inrush current.
