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LP8731-Q1

ACTIVE

Dual high-current step-down DC/DC & dual linear reg with I²C interface

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Data sheet

LP8731-Q1

ACTIVE
Data sheet Order now

Product details

Regulated outputs (#) 4 Configurability Factory programmable, Software configurable Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (min) (V) 0.8875 Vout (max) (V) 1.675 Iout (max) (A) 1.2 Features Enable pin, I2C control, Power good, Power sequencing, Spread-Spectrum Clock (SSC) Generation, Thermal shutdown, UVLO adjustable Step-up DC/DC converter 0 Step-down DC/DC converter 2 Step-down DC/DC controller 0 Step-up DC/DC controller 0 LDO 2 Iq (typ) (mA) 0.04 Rating Automotive Switching frequency (max) (kHz) 2500 Operating temperature range (°C) -40 to 125 Processor supplier Generic Processor name Generic Shutdown current (ISD) (typ) (µA) 0.03 Switching frequency (typ) (kHz) 2100
Regulated outputs (#) 4 Configurability Factory programmable, Software configurable Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (min) (V) 0.8875 Vout (max) (V) 1.675 Iout (max) (A) 1.2 Features Enable pin, I2C control, Power good, Power sequencing, Spread-Spectrum Clock (SSC) Generation, Thermal shutdown, UVLO adjustable Step-up DC/DC converter 0 Step-down DC/DC converter 2 Step-down DC/DC controller 0 Step-up DC/DC controller 0 LDO 2 Iq (typ) (mA) 0.04 Rating Automotive Switching frequency (max) (kHz) 2500 Operating temperature range (°C) -40 to 125 Processor supplier Generic Processor name Generic Shutdown current (ISD) (typ) (µA) 0.03 Switching frequency (typ) (kHz) 2100
DSBGA (YZR) 25 7.5625 mm² 2.75 x 2.75
  • 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
  • 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

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.

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.
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* Data sheet LP8731-Q1 Dual High-Current Step-Down DC-DC And Dual Linear Regulators with I2C Interface datasheet PDF | HTML 08 Dec 2014
User guide Using the LP8731-Q1 Evaluation Module 21 Nov 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

GUI for evaluation module (EVM)

SNVC163 — LP8731-Q1 Evaluation Program Installer

Supported products & hardware

Supported products & hardware

Products
Multi-channel ICs (PMICs)
LP8731-Q1 — Dual high-current step-down DC/DC & dual linear reg with I²C interface
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Reference designs

TIDA-00530 — Automotive Power Reference Design for Low Power TDA3x Based Systems

This solution was designed to make an integrated, size-optimized power design for ADAS applications using the TDA3x SoC off of an automotive battery input.  By targeting only applications with lower processing needs, we’re able to choose devices and components which are smaller, compared (...)
Design guide: PDF
Schematic: PDF
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DSBGA (YZR) 25 Ultra Librarian
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