LM5157-Q1 - Texas Instruments

LM5157-Q1 Boost/SEPIC/Flyback Converter

The LM5157x-Q1 device is a wide input range, nonsynchronous boost converter with integrated 50-V, 6.5-A (LM5157-Q1) or 50-V, 4.33-A (LM51571-Q1) power switch. The device can be used in boost, SEPIC, and flyback topologies. The device can start up from a single-cell battery with a minimum of 2.9 V. It can operate with the input supply voltage as low as 1.5 .

Features

• AEC-Q100 qualified for automotive applications
  – Temperature grade 1:
  –40°C to +125°C TA
• Functional Safety-Capable
  – Documentation available to aid functional safety system design
• Suited for wide operating range for car battery applications
  – 2.9-V to 45-V input operating range
  – 48-V maximum output (50-V abs max)
  – Minimum boost supply voltage of 1.5 V when BIAS ≥ 2.9 V
  – Input transient protection up to 50 V
  – Minimized battery drain
• Low shutdown current (IQ ≤ 2.6 µA)
• Low operating current (IQ ≤ 700 µA)
• Small solution size and low cost
  – Maximum switching frequency up to 2.2 MHz .