LP873220 (ACTIVE)

Dual High-Current Buck Converters and Linear Regulators

Dual High-Current Buck Converters and Linear Regulators - LP873220


The LP873220 is designed to meet the power management requirements of the latest processors and platforms in industrial applications. The device contains two step-down DC-DC converters and two linear regulators and general-purpose digital-output signals. The device is controlled by an I2C-compatible serial interface and by an enable signal.

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

The LP873220 device supports load-current measurement without the addition of external current-sense resistors. The LP873220 device also supports programmable start-up and shutdown delays and sequences including GPO signals synchronized to the enable signal. A second GPO signal is available with pin multiplexing of CLKIN pin, if external clock is not needed. During start-up and voltage change, the device controls the output slew rate to minimize output voltage overshoot and the in-rush current.


  • Device Operating Temperature Range: –40°C to +125°C Ambient Temperature
  • Input Voltage: 2.8 V to 5.5 V
  • Two High-Efficiency Step-Down DC-DC Converters:
    • Output Voltage: 0.7 V to 3.36 V
    • Maximum Output Current 2 A
    • Programmable Output-Voltage Slew Rate From 0.5 mV/µs to 10 mV/µs
    • 2-MHz Switching Frequency
    • Spread-Spectrum Mode and Phase Interleaving for EMI Reduction
  • Two Linear Regulators:
    • Input Voltage: 2.5 V to 5.5 V
    • Output Voltage: 0.8 V to 3.3 V
    • Maximum Output Current 300 mA
  • 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
  • Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)
  • 28-pin, 5-mm × 5-mm VQFN Package with Wettable Flanks

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Parametrics Compare all products in Power Management Multi-Channel IC (PMIC) Solutions

Regulated Outputs (#)
Processor Supplier
Processor Name
Vin (Min) (V)
Vin (Max) (V)
Step-Down DC/DC Converter
Iout (Max) (A)
Operating Temperature Range (C)
LP873220 LP87332D
4    4   
Texas Instruments    Texas Instruments   
AM570x    AM570x   
2.8    2.8   
5.5    5.5   
2    2   
2    2   
2    3   
Enable Pin
I2C Control
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Adjustable   
Enable Pin
I2C Control
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Adjustable   
Catalog    Catalog   
-40 to 125    -40 to 125   
28VQFN    28VQFN   

Other qualified versions of LP873220

Version Part Number Definition
Automotive LP873220-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects