LMR10515XMF/NOPB

The LMR10515 regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 5 pin SOT-23 and a 6 Pin WSON package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LMR10515 is easy to use. The ability to drive 1.5A loads with an internal 130 mΩ PMOS switch results in the best power density available. The control circuitry allows on-times as low as 30ns, thus supporting exceptionally high frequency conversion over the entire 3V to 5.5V input operating range down to the minimum output voltage of 0.6V. The LMR10515 is internally compensated, so it is simple to use and requires few external components. Switching frequency is internally set to 1.6 MHz, or 3.0 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30 nA. The LMR10515 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection.

Applications

• Point-of-Load Conversions from 3.3V, and 5V Rails
• Space Constrained Applications
• Battery Powered Equipment
• Industrial Distributed Power Applications
• Power Meters
• Portable Hand-Held Instruments

Key features

• Input Voltage Range of 3V to 5.5V
• Output Voltage Range of 0.6V to 4.5V
• Output Current up to 1.5A
• 1.6MHz (LMR10515X) and 3 MHz (LMR10515Y) Switching Frequencies
• Low Shutdown Iq, 30 nA Typical
• Internal Soft-Start
• Internally Compensated
• Current-Mode PWM Operation
• Thermal Shutdown
• SOT-23 (2.92×2.84×1 mm) and WSON (3×3×0.8 mm) Packaging
• Fully Enabled for WEBENCH Power Designer