LP8731-Q1 (ACTIVE)

LP8731-Q1 Dual High-Current Step-Down DC/DC & Dual Linear Reg with I2C Interface

LP8731-Q1 Dual High-Current Step-Down DC/DC & Dual Linear Reg with I2C Interface - LP8731-Q1


The LP8731-Q1 is a multi-function, programmable Power Management Unit (PMU), optimized for low power FPGAs, microprocessors, and DSPs. This device integrates two highly efficient 1.2-A step-down DC-DC converters with dynamic voltage management (DVM), two 300-mA linear regulators, and a 400-kHz I2C-compatible interface to allow a host controller access to the internal control registers of the LP8731-Q1. The LP8731-Q1 device additionally features programmable power-on sequencing.


  • Two LDOs for Powering Internal Processor Functions and I/Os
  • High-Speed Serial Interface for Independent Control of Device
    Functions and Settings
  • Precision Internal Reference
  • Thermal Overload Protection
  • Current Overload Protection
  • Software Programmable Regulators
  • External Power-On-Reset Function for Buck1 and Buck2
    (Power Good with Delay Function)
  • Undervoltage Lockout (UVLO)
  • LP8731-Q1 is an Automotive-Grade Product: AECQ-100
    Grade-1 Qualified
  • Step-Down DC/DC Converter (2xBuck)
    • Programmable VOUT from:
      • Buck1 : 0.8875 V – 1.675 V at 1.2 A
      • Buck2 : 0.8875 V – 1.675 V at 1.2 A
    • Up to 96% Efficiency
    • PWM Switching Frequency of 2.1 MHz
    • ±2% Output Voltage Accuracy
    • Automatic Soft Start
  • Linear Regulators (2xLDO)
    • Programmable VOUT of 0.8 V to 3.3 V
    • ±3% Output Voltage Accuracy
    • 300-mA Output Current
    • 30-mV (Typical) Dropout

View more

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)
Iq (Typ) (mA)
Shutdown Current (Typ) (uA)
Operating Temperature Range (C)
LP8731-Q1 LP3907-Q1
4    4   
  Advanced Apps Processors
2.8    1.74   
5.5    5.5   
2    2   
2    2   
1.2    1   
0.06    0.03   
  Comm Control
Dynamic Voltage Scaling
Over Current Protection
Power Good
Synchronous Rectification
Thermal Shutdown
UVLO Adjustable   
0.03    0.01   
Automotive    Automotive   
-40 to 125    -40 to 125