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LP87702

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Dual buck converter and 5-V boost with diagnostic functions for industrial radar

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Data sheet

LP87702

ACTIVE
Data sheet Order now

Product details

Processor supplier Texas Instruments Processor name mmWave IWR Product type Radar sensor Regulated outputs (#) 3 Step-down DC/DC converter 2 Step-up DC/DC converter 1 LDO 0 Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (min) (V) 0.7 Vout (max) (V) 5.2 Iout (max) (A) 3.5 Configurability Factory programmable, Software configurable TI functional safety category Functional Safety Quality-Managed Features Dynamic voltage scaling, Enable, Enable pin, I2C control, Overcurrent protection, Power good, Power sequencing, Power supply and system monitoring, Spread-Spectrum Clock (SSC) Generation, Thermal shutdown, UVLO fixed Rating Catalog Operating temperature range (°C) -40 to 105 Step-down DC/DC controller 0 Step-up DC/DC controller 0 Iq (typ) (mA) 27 Switching frequency (max) (kHz) 4000 Shutdown current (ISD) (typ) (µA) 1 Switching frequency (typ) (kHz) 2000
Processor supplier Texas Instruments Processor name mmWave IWR Product type Radar sensor Regulated outputs (#) 3 Step-down DC/DC converter 2 Step-up DC/DC converter 1 LDO 0 Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (min) (V) 0.7 Vout (max) (V) 5.2 Iout (max) (A) 3.5 Configurability Factory programmable, Software configurable TI functional safety category Functional Safety Quality-Managed Features Dynamic voltage scaling, Enable, Enable pin, I2C control, Overcurrent protection, Power good, Power sequencing, Power supply and system monitoring, Spread-Spectrum Clock (SSC) Generation, Thermal shutdown, UVLO fixed Rating Catalog Operating temperature range (°C) -40 to 105 Step-down DC/DC controller 0 Step-up DC/DC controller 0 Iq (typ) (mA) 27 Switching frequency (max) (kHz) 4000 Shutdown current (ISD) (typ) (µA) 1 Switching frequency (typ) (kHz) 2000
VQFN (RHB) 32 25 mm² 5 x 5
  • FMEDA and Functional Safety Manual Available to Support System-Level Functional Safety Requirements up to SIL-2 (IEC 61508)
  • Two High-Efficiency Step-Down DC/DC converters:
    • Maximum Output Current 3.5 A
    • 2-MHz, 3-MHz, or 4-MHz Switching Frequency
    • Auto PWM/PFM and Forced-PWM Operations
    • Output Voltage = 0.7 V to 3.36 V
  • 5-V 600 mA Boost Converter
  • Two Inputs for External Voltage Monitoring
  • Two Programmable Power-Good Signals
  • Dedicated Reference Voltage for Diagnostics
  • Window Watchdog with Reset Output
  • External Clock Input to Synchronize Switching
  • Spread-Spectrum Modulation
  • Programmable Start-up and Shutdown Delays and Sequencing with Enable Signal
  • Configurable General Purpose Outputs (GPOs)
  • I2C-Compatible Interface
  • Interrupt Function with Programmable Masking
  • Output Short-Circuit and Overload Protection
  • Overtemperature Warning and Protection
  • Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)
  • FMEDA and Functional Safety Manual Available to Support System-Level Functional Safety Requirements up to SIL-2 (IEC 61508)
  • Two High-Efficiency Step-Down DC/DC converters:
    • Maximum Output Current 3.5 A
    • 2-MHz, 3-MHz, or 4-MHz Switching Frequency
    • Auto PWM/PFM and Forced-PWM Operations
    • Output Voltage = 0.7 V to 3.36 V
  • 5-V 600 mA Boost Converter
  • Two Inputs for External Voltage Monitoring
  • Two Programmable Power-Good Signals
  • Dedicated Reference Voltage for Diagnostics
  • Window Watchdog with Reset Output
  • External Clock Input to Synchronize Switching
  • Spread-Spectrum Modulation
  • Programmable Start-up and Shutdown Delays and Sequencing with Enable Signal
  • Configurable General Purpose Outputs (GPOs)
  • I2C-Compatible Interface
  • Interrupt Function with Programmable Masking
  • Output Short-Circuit and Overload Protection
  • Overtemperature Warning and Protection
  • Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)

The LP87702 contains two step-down DC/DC converters, and a 5-V boost converter to support safety critical applications. The device integrates two voltage monitoring inputs for external power supplies and a window watchdog.

The automatic PWM/PFM (AUTO mode) operation gives high efficiency over a wide output current range for buck converters.

This device contains one-time-programmable (OTP) memory. Each orderable part number has specific OTP settings for a given application. Details of the default OTP configuration for each orderable part number is found in the technical reference manual.

The LP87702 contains two step-down DC/DC converters, and a 5-V boost converter to support safety critical applications. The device integrates two voltage monitoring inputs for external power supplies and a window watchdog.

The automatic PWM/PFM (AUTO mode) operation gives high efficiency over a wide output current range for buck converters.

This device contains one-time-programmable (OTP) memory. Each orderable part number has specific OTP settings for a given application. Details of the default OTP configuration for each orderable part number is found in the technical reference manual.
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Technical documentation

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* Data sheet LP87702 Dual Buck Converter and 5-V Boost With Diagnostic Functions datasheet PDF | HTML 24 Mar 2021
Technical article Improving industrial radar RF performance with low-noise, thermal-optimized power PDF | HTML 21 Apr 2021
User guide LP87702K Technical Reference Manual 06 Jun 2020

Design & development

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Evaluation board

LP8770Q1EVM — Evaluation Module for LP8770-Q1 Boost and Dual Buck Regulators With Diagnostic Functions

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Reference designs

TIDEP-01025 — mmWave diagnostic and monitoring reference design

This reference design showcases the inbuilt autonomous monitoring functionality in mmWave radar sensors that enhances system efficiency by minimizing the processing load on the host. The design uses a safety diagnostic library (SDL) to run diagnostic tests on programmable digital cores, peripherals (...)
Design guide: PDF
Schematic: PDF
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VQFN (RHB) 32 Ultra Librarian
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