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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

Regulated outputs (#) 3 Vin (Min) (V) 2.8 Vin (Max) (V) 5.5 Iout (Max) (A) 3.5 Rating Catalog Step-down DC/DC controller 0 Step-down DC/DC converter 2 Step-up DC/DC controller 0 Step-up DC/DC converter 1 LDO 0 Iq (Typ) (mA) 27 Features Dynamic Voltage Scaling, Enable, Enable Pin, I2C Control, Over Current Protection, Power Good, Power Sequencing, Power Supply and System Monitoring, Spread-Spectrum Clock (SSC) Generation, Thermal Shutdown, UVLO Fixed Operating temperature range (C) -40 to 105 Processor name IWRxxx Processor supplier Texas Instruments Shutdown current (ISD) (Typ) (uA) 1 Configurability Factory programmable, Software configurable
Regulated outputs (#) 3 Vin (Min) (V) 2.8 Vin (Max) (V) 5.5 Iout (Max) (A) 3.5 Rating Catalog Step-down DC/DC controller 0 Step-down DC/DC converter 2 Step-up DC/DC controller 0 Step-up DC/DC converter 1 LDO 0 Iq (Typ) (mA) 27 Features Dynamic Voltage Scaling, Enable, Enable Pin, I2C Control, Over Current Protection, Power Good, Power Sequencing, Power Supply and System Monitoring, Spread-Spectrum Clock (SSC) Generation, Thermal Shutdown, UVLO Fixed Operating temperature range (C) -40 to 105 Processor name IWRxxx Processor supplier Texas Instruments Shutdown current (ISD) (Typ) (uA) 1 Configurability Factory programmable, Software configurable
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VQFN (RHB) 32 25 mm² 5 x 5
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  • 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)
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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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Type Title Date
* Data sheet LP87702 Dual Buck Converter and 5-V Boost With Diagnostic Functions datasheet 24 Mar 2021
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Technical article Improving industrial radar RF performance with low-noise, thermal-optimized power solutions 21 Apr 2021
User guide LP87702K Technical Reference Manual 06 Jun 2020

Design & development

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