LM3151/2/3 SIMPLE SWITCHER® CONTROLLER, 42V Synchronous Step-Down is an easy-to-use and simplified step down power controller capable of providing up to 12A of output current in a typical application.
The LM3151/LM3152/LM3153 SIMPLE SWITCHER® Controller is a step‑down power controller that operates from 6 V to 42 V input and delivers up to 12 A of output current at a fixed 3.3 V output. It uses a Constant On‑Time architecture with an Emulated Ripple Mode control, allowing low‑ESR output capacitors and eliminating the need for loop compensation.
Key features include selectable switching frequencies (250 kHz, 500 kHz, 750 kHz), built‑in fault protection (thermal shutdown, UVLO, OVP, short‑circuit protection), low external component count, and full WEBENCH® design‑tool support. The device is offered in a TSSOP‑14 package and is suitable for telecom, networking, security, and power‑module applications.
| Input voltage range | 6 V to 42 V |
|---|---|
| Fixed output voltage | 3.3 V |
| Switching frequencies | 250 kHz, 500 kHz, 750 kHz |
| Maximum output current | 12 A |
| Package type | TSSOP‑14 |
| Thermal shutdown temperature | 165 °C |
| Under‑voltage lockout threshold (VCC) | 4.75 V (typical) |
| Over‑voltage threshold (Vout‑ov) | 3.83 V (typical) |
The controller operates from 6 V up to 42 V input.
It provides a fixed 3.3 V output.
The controller can be set to 250 kHz, 500 kHz, or 750 kHz.
It can deliver up to 12 A of output current.