LMR12020XSDX/NOPB

The LMR120xx regulator is a monolithic, high frequency, PWM step-down DC/DC converter in a 10-pin WSON package. It contains 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 LMR12015/20 is easy to use. The ability to drive 1.5-A or 2-A loads, with an internal 150-mΩ NMOS switch results in the best power density available. The control circuitry allows for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown is included featuring an ultra-low shutdown current of 70 nA. The LMR12015/20 utilizes peak 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 overvoltage protection.

Key Features

• Input Voltage Range of 3 V to 20 V
• Output Voltage Range of 1 V to 18 V
• LMR12015 and LMR12020 Deliver 1.5-A and 2-A Maximum Output Current, Respectively
• 2-MHz Switching Frequency
• Frequency Synchronization from 1 MHz to 2.35 MHz
• 70-nA Shutdown Current
• 1% Voltage-Reference Accuracy
• Peak-Current-Mode PWM Operation
• Thermal Shutdown
• Internally Compensated
• Internal Soft Start
• Tight Accuracy for Powering Digital ICs
• Extremely Easy to Use
• Tiny Overall Solution Reduces System Cost
• Space-Saving WSON (3 × 3 × 0.8 mm) Packaging
• Create a custom design using the LMR12015 WEBENCH^® Power Designer or LMR12020 WEBENCH^® Power Designer