LP87702-Q1 Dual Buck Converter and 5-V Boost With Diagnostic Functions | TI.com

LP87702-Q1
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Dual Buck Converter and 5-V Boost With Diagnostic Functions

 

More information

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Description

The LP87702-Q1 helps meet the power management requirements of the latest platforms, particularly in automotive radar and camera and industrial radar applications. The device contains two step-down DC/DC converters, and a 5-V boost converter/bypass switch. 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. The LP87702-Q1 uses remote voltage sensing to compensate IR drop between the converter output and the point-of-load, thus improving the accuracy of the output voltage.

Programmable start-up and shutdown sequences synchronized to the enable signal are supported, including general purpose digital outputs. During start-up and voltage change, the device controls the output slew rate for minimum output voltage overshoot and inrush current. 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 can be found in the technical reference manual.

Features

  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C, TA
  • FMEDA and Functional Safety Manual available to support your ASIL compliant system designs
  • 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 Boost Converter With Bypass-Mode Option:
    • Maximum Output Current 600 mA
  • 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 Supporting Standard (100 kHz), Fast (400 kHz), Fast+ (1 MHz), and High-Speed (3.4 MHz) Modes
  • 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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Parametrics

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Part number Order Regulated outputs (#) Processor supplier Processor name Vin (Min) (V) Vin (Max) (V) Step-up DC/DC controller Step-down DC/DC controller LDO Step-up DC/DC converter Step-down DC/DC converter Iout (Max) (A) Iq (Typ) (mA) Features Shutdown current (Typ) (uA) Rating Operating temperature range (C) Configurability Package Group Package size: mm2:W x L (PKG)
LP87702-Q1 Order now 3     TI     AWRxxx, IWRxxx     2.8     5.5     0     0     0     1     2     3.5     27     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    
1     Automotive     -40 to 125       VQFN | 32     32VQFN: 25 mm2: 5 x 5 (VQFN | 32)    
LP873220-Q1 Order now 4     Texas Instruments     DRA71x
DRA79x    
2.8     5.5     0     0     2     0     2     2     0.009     Enable Pin
I2C Control
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Adjustable    
  Automotive     -40 to 125     Software configurable     VQFN | 28     28VQFN: 25 mm2: 5 x 5 (VQFN | 28)    
LP87332A-Q1 Order now 4     Texas Instruments     TDA3x     2.8     5.5     0     0     2     0     2     3     0.009     Enable Pin
I2C Control
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Adjustable    
  Automotive     -40 to 125     Software configurable     VQFN | 28     28VQFN: 25 mm2: 5 x 5 (VQFN | 28)    
LP87524B-Q1 Order now 4     Texas Instruments     AWR1243     2.8     5.5     0     0     0     0     4     3     0.0067     Diagnostics
Dynamic Voltage Scaling
Enable
I2C Control
Over Current Protection
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Fixed    
1.4     Automotive     -40 to 125     Factory programmable
Software configurable    
VQFN-HR | 26     26VQFN-HR: 18 mm2: 4 x 4.5 (VQFN-HR | 26)    
LP87524J-Q1 Order now 4     Texas Instruments     AWR1243, AWR1443