Overview
The LMR10510XMF/NOPB from Texas Instruments is a high-frequency, PWM step-down DC/DC converter integrated into a compact 5-pin SOT-23 or 6-pin WSON package. This regulator is designed to provide efficient local DC/DC conversion with fast transient response and accurate regulation, making it ideal for space-constrained applications. It supports input voltages from 3 V to 5.5 V and can deliver output voltages ranging from 0.6 V to 4.5 V with a maximum output current of 1 A. The device features internal soft-start, current-mode PWM operation, and thermal shutdown, ensuring reliable and efficient performance.
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 |
| Quiescent Current (switching) | 3.3 to 5 mA (LMR10510X), 4.3 to 6.5 mA (LMR10510Y) | mA |
| 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 limit total power dissipation
- Output overvoltage protection
- Undervoltage lockout (UVLO) to prevent operation below 2.73 V
- Pulse-by-pulse current limit to protect the output switch
- Low shutdown IQ of 30 nA typical
- High efficiency up to 93%
- Compact packaging (SOT-23 and WSON) reducing system cost and board space
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 LMR10510XMF/NOPB?
The input voltage range is from 3 V to 5.5 V.
- What are the available output voltage ranges for this regulator?
The output voltage range is from 0.6 V to 4.5 V.
- What is the maximum output current of the LMR10510XMF/NOPB?
The maximum output current is up to 1 A.
- What are the switching frequencies available for this regulator?
The switching frequencies are 1.6 MHz (LMR10510X) and 3 MHz (LMR10510Y).
- What is the typical shutdown IQ of the LMR10510XMF/NOPB?
The typical shutdown IQ is 30 nA.
- Does the LMR10510XMF/NOPB have thermal shutdown protection?
- What types of packages are available for the LMR10510XMF/NOPB?
The regulator is available in 5-pin SOT-23 and 6-pin WSON packages.
- What is the purpose of the internal soft-start circuitry in the LMR10510XMF/NOPB?
The internal soft-start circuitry reduces inrush current during startup by ramping up the output voltage in a controlled manner.
- Does the LMR10510XMF/NOPB have output overvoltage protection?
- What is the recommended type of capacitors for use with the LMR10510XMF/NOPB?
Surface mount capacitors such as multilayer ceramic capacitors (MLCCs) with X7R or X5R type are recommended due to their low ESL and suitable temperature characteristics.
