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LP873220

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Industrial dual 2-A buck converters & dual linear regulators for AM570x

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Data sheet

LP873220

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) -0.3 Vout (max) (V) 7 Iout (max) (A) 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) 0.009 Rating Automotive, Catalog Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 125 Processor supplier Texas Instruments Processor name Sitara AM57x Switching frequency (typ) (kHz) 2000 Product type Processor and FPGA
Regulated outputs (#) 4 Configurability Factory programmable, Software configurable Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (min) (V) -0.3 Vout (max) (V) 7 Iout (max) (A) 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) 0.009 Rating Automotive, Catalog Switching frequency (max) (kHz) 2200 Operating temperature range (°C) -40 to 125 Processor supplier Texas Instruments Processor name Sitara AM57x Switching frequency (typ) (kHz) 2000 Product type Processor and FPGA
VQFN (RHD) 28 25 mm² 5 x 5
  • 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
  • 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

The LP873220 is designed to meet the power management requirements of the latest processors and platforms in industrial applications. The device has two step-down DC/DC converters, two linear regulators, and two 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.

The LP873220 is designed to meet the power management requirements of the latest processors and platforms in industrial applications. The device has two step-down DC/DC converters, two linear regulators, and two 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.
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Type Title Date
* Data sheet LP873220 Dual High-Current Buck Converter and Dual Linear Regulator datasheet (Rev. A) PDF | HTML 04 Jun 2021
User guide LP87332D and LP873220 User’s Guide to Power AM570x (Rev. A) 10 Jul 2018

Design & development

Power-supply solutions

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Evaluation board

LP87322Q1EVM — LP873220-Q1 Dual High-Current Buck Converters and Dual Linear Regulator Evaluation Module

The LP87322Q1EVM demonstrates the integrated circuit LP873220-Q1 from Texas Instruments.

The LP873220-Q1 has two high-performance step-down converters and two LDOs, designed to meet the power management requirements of the latest applications processors in automotive applications. The LP873220-Q1 is (...)

User guide: PDF
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Simulation model

LP87322-Q1 PSpice Transient Model (Rev. A)

SNVMB17A.ZIP (213 KB) - PSpice Model
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PEET-GUI — PMIC Efficiency Estimator Tool (PEET)

The PMIC Efficiency Estimator Tool (PEET GUI) is a graphical user interface used to easily evaluate PMIC DC/DC regulator efficiency relative to your design conditions. The PEET GUI can be used to configure each DC/DC regulator separately and provides real-time efficiency and power dissipation data (...)
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