LM5156 - Texas Instruments

LM5156 Non-synchronous Boost/SEPIC/Flyback Controller

The LM5156x (LM5156 and LM51561) device is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies. The LM5156x device can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply .

Features

• Functional Safety-Capable
  – Documentation available to aid functional safety system design
• Suited for wide input operating range battery applications
  – 3.5-V to 60-V operating range (65-V abs max)
  – 2.97-V to 16-V when BIAS = VCC
  – Minimum boost supply voltage 1.5 V when BIAS ≥ 3.5 V
  – Input transient protection up to 65 V
  – Minimized battery drain
• Low shutdown current (IQ ≤ 2.6 µA)
• Low operating current (IQ ≤ 490 µA)
• Small solution size and low cost
  – Maximum switching frequency of 2.2 MHz
  – 12-Pin WSON package (3 mm × 2 mm)
  – Integrated error amplifier allows primary-side regulatio.