The LM3150 is a simple step-down power controller from National Semiconductor that can provide up to 12A of output current in a typical application. It features an adjustable output voltage down to 0.6V, an input voltage range of 6V-42V, and a switching frequency that can be adjusted up to 1MHz. The LM3150 uses a proprietary Emulated Ripple Mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage ripple.
The LM3150 SIMPLE SWITCHER® Controller is a synchronous step‑down regulator that operates from 6 V to 42 V input and can deliver up to 12 A of output current. It features an adjustable output voltage down to 0.6 V, programmable switching frequency up to 1 MHz, and a Constant On‑Time architecture with Emulated Ripple Mode for low‑ESR capacitor use.
The document includes a connection diagram, ordering information, and a full pin‑out table. Electrical characteristics such as absolute maximum ratings, thermal shutdown at 165 °C, and protection functions (thermal shutdown, UVLO, OVP, short‑circuit, current limit) are listed, along with typical performance graphs and physical dimensions for the 14‑pin TSSOP package.
| Input voltage range | 6 V to 42 V |
|---|---|
| Maximum output current | 12 A |
| Adjustable output voltage | down to 0.6 V |
| Programmable switching frequency | up to 1 MHz |
| Feedback reference voltage | 0.6 V |
| Thermal shutdown temperature | 165 °C |
The LM3150 operates from 6 V to 42 V input.
It can deliver up to 12 A of output current.
The FB pin reference voltage is 0.6 V.
It includes thermal shutdown, under‑voltage lockout, over‑voltage protection, short‑circuit protection, current limit, and output voltage pre‑bias startup.