TI LP873220RHDT

The LP873220 is designed to meet the power management requirements of new processors and platforms in industrial applications. The device features two step-down DC/DC converters, two LDOs, and two general-purpose digital output signals. The device is controlled via an I2C-compatible serial interface and enable signals.

Auto PWM/PFM (AUTO mode) operation delivers high efficiency over a wide output current range. The LP873220 supports remote voltage sensing to compensate for IR drop between the regulator output and the point-of-load (POL), improving output voltage accuracy. In addition, the switching clock can be forced into PWM mode and synchronized with an external clock to minimize interference.

The LP873220 supports load current measurement without external current sense resistors. The LP873220 also supports programmable startup, shutdown delays, and sequencing control, including GPO signals synchronized with the enable signal. If an external clock is not required, a second GPO signal can be provided through pin multiplexing on the CLKIN pin. During startup and voltage transitions, the device controls the output slew rate to minimize output voltage overshoot and inrush current.

• Operating temperature range: -40°C to +125°C ambient temperature
• Input voltage: 2.8V to 5.5V
• Two high-efficiency step-down DC/DC converters:
  • Output voltage: 0.7V to 3.36V
  • Maximum output current: 2A
  • Programmable output voltage slew rate: 0.5mV/µs to 10mV/µs
  • 2MHz switching frequency
  • Spread spectrum mode and phase interleaving for EMI reduction
• Two LDO regulators:
  • Input voltage: 2.5V to 5.5V
  • Output voltage: 0.8V to 3.3V
  • Maximum output current: 300mA
• Configurable general-purpose output signals (GPO, GPO2)
• Interrupt function with programmable masking
• Programmable power-good signal (PGOOD)
• Output short-circuit and overload protection
• Overtemperature warning and protection
• OVP and UVLO
• 28-pin, 5mm × 5mm VQFN package with wettable flanks

• Industrial applications