LMR36006 4.2-V to 60-V, 0.6-A Ultra-Small Synchronous Step-Down Converter

1 Features

• Designed for reliable and rugged applications
  • Input transient protection up to 66 V
  • Junction temperature range –40°C to +150°C
  • Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
  • 0.2-V dropout with 0.6-A load (typical)
• Suited for scalable industrial power supplies
  • Pin compatible with:
    • LMR36015 (60 V, 1.5 A)
    • LMR33620/LMR33630 (36 V, 2 A, or 3 A)
  • 1-MHz, 2.1-MHz frequency options
• Low power dissipation across load spectrum
  • 87% efficiency at 1 MHz (24V_IN, 5V_OUT, 0.6A)
  • 92% efficiency at 1 MHz (12V_IN, 5V_OUT, 0.6A)
  • Increased light load efficiency in PFM
  • Low operating quiescent current of 26 µA
• Small 2-mm × 3-mm HotRod™ package
• Solution with few external components
• LMR36006-Q1 and LMR36015-Q1 available in 400 kHz and 2.1 MHz, adjustable output, and fixed 3.3 V_OUT
• Optimized for ultra low EMI requirements
  • Meets CISPR25 class 5 standard
  • Hotrod™ package minimizes switch node ringing
  • Parallel input path minimizes parasitic inductance
  • Spread spectrum reduces peak emissions
• Create a custom design using the LMR36006 with the WEBENCH® Power Designer

2 Applications

• Field transmitters and sensors, PLC modules
• Thermostats, video surveillance, HVAC systems
• AC and servo drives, rotary encoders
• Industrial transport, asset tracking

3 Description

The LMR36006 regulator is an easy-to-use, synchronous, step-down DC/DC converter. With integrated high-side and low-side power MOSFETs, up to 0.6 A of output current is delivered over a wide input voltage range of 4.2 V to 60 V. Tolerance goes up to 66 V. The transient tolerance reduces the necessary design effort to protect against overvoltages and meets the surge immunity requirements of IEC 61000-4-5.

The LMR36006 uses peak-current-mode control to provide optimal efficiency and output voltage accuracy. Precision enable gives flexibility by enabling a direct connection to the wide input voltage or precise control over device start-up and shutdown. The power-good flag, with built-in filtering and delay, offers a true indication of system status eliminating the requirement for an external supervisor.

The LMR36006 is in a HotRod™ package which enables low noise, higher efficiency, and the smallest package to die ratio. The device requires few external components and has a pinout designed for simple PCB layout. The small solution size and feature set of the LMR36006 are designed to simplify implementation for a wide range of end equipment, including space critical applications of ultra-small field transmitters and vision sensors.

1. For all available packages, see the orderable addendum at the end of the data sheet.