Overview
The LMR10515XMFE/NOPB is a high-frequency, PWM step-down DC/DC converter produced by Texas Instruments. This regulator is designed to provide efficient and compact local DC/DC conversion with fast transient response and accurate regulation. It is available in both SOT-23 and WSON packages, making it suitable for space-constrained applications. The device operates over an input voltage range of 3 V to 5.5 V and can deliver an output current of up to 1.5 A. It features internal compensation, soft-start circuitry, and a range of protection mechanisms including thermal shutdown, output over-voltage protection, and cycle-by-cycle current limiting.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 3 | - | 5.5 | V |
| Output Voltage Range | 0.6 | - | 4.5 | V |
| Output Current | - | - | 1.5 | A |
| Switching Frequency (LMR10515X) | 1.2 | 1.6 | 1.95 | MHz |
| Switching Frequency (LMR10515Y) | 2.25 | 3.0 | 3.75 | MHz |
| Feedback Voltage | 0.588 | 0.600 | 0.612 | V |
| Undervoltage Lockout (VIN Rising) | 2.73 | 2.90 | - | V |
| Undervoltage Lockout (VIN Falling) | 1.85 | 2.3 | - | V |
| Shutdown Current | - | - | 30 | nA |
| Thermal Shutdown Temperature | - | - | 165 | °C |
| Package Types | - | - | SOT-23, WSON | - |
Key Features
- High-frequency operation: 1.6 MHz (LMR10515X) and 3 MHz (LMR10515Y) switching frequencies, allowing the use of small surface mount inductors and capacitors.
- Internal compensation: Simplifies the design and reduces the number of external components required.
- Internal soft-start: Reduces inrush current during startup.
- Current-mode PWM operation: Provides high-performance regulation over a wide range of operating conditions.
- Thermal shutdown and output over-voltage protection: Enhances reliability and safety.
- Low shutdown current: Ultra-low standby current of 30 nA.
- Compact packaging: Available in SOT-23 and WSON packages, ideal for space-constrained applications.
- High efficiency: Efficiencies up to 93% can be achieved.
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 LMR10515?
The input voltage range is from 3 V to 5.5 V.
- What are the available switching frequencies for the LMR10515?
The switching frequencies are 1.6 MHz (LMR10515X) and 3 MHz (LMR10515Y).
- What is the maximum output current of the LMR10515?
The maximum output current is up to 1.5 A.
- What are the package types available for the LMR10515?
The device is available in SOT-23 and WSON packages.
- What is the typical shutdown current of the LMR10515?
The typical shutdown current is 30 nA.
- Does the LMR10515 have thermal shutdown protection?
Yes, it has thermal shutdown protection with a threshold temperature of 165°C.
- How does the internal soft-start feature work?
The internal soft-start circuitry ramps up the reference voltage over approximately 600 µs to reduce inrush current during startup.
- What is the feedback voltage range for the LMR10515?
The feedback voltage range is from 0.588 V to 0.612 V.
- What are some common applications for the LMR10515?
Common applications include point-of-load conversions, space-constrained applications, battery-powered equipment, industrial distributed power applications, power meters, and portable hand-held instruments.
- How efficient is the LMR10515?
The LMR10515 can achieve efficiencies up to 93%.
