LP87745 - Texas Instruments

LP87745 Three Buck Converters and 5-V Boost

The LP8774x device is designed to meet the power management requirements of the IWR MMICs in various industrial radar applications. The device has three step-down DC/DC converters, a 5-V boost converter and a 1.8 V or 3.3 V LDO. The LDO is powered from the boost and intended for xWR I/O supply. An SPI serial interface and enable signals control the device. .

Features

• Device operating temperature :
  –40°C to +125°C ambient
• Input voltage: 3.3 V nominal (3 V to 4 V range)
• Three low-noise step-down DC/DC converters:
  – Output voltage: 0.9 V to 1.9 V, 0.8 V (BUCK3), 0.82 V (BUCK3)
  – Maximum output current: 3 A/ 3 A/ 3 A
  – Switching frequency: 4.4 MHz, 8.8 MHz, and 17.6 MHz
• 5 V boost converter
  – Maximum output current: 350 mA
• 150 mA LDO
  – Output voltage 1.8 V or 3.3 V
• Output short-circuit and overload protection
• Input overvoltage protection (OVP) and undervoltage lockout (UVLO)
• Overtemperature warning and protection
• Serial peripheral interface (S.