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See Technical Specifications

LP87702DRHBTQ1 +BOM

Dual buck converter and 5-V boost with diagnostic functions

Manufacturer:

TI
Mfr.Part #:

LP87702DRHBTQ1
Datasheet:

LP87702DRHBTQ1 Datasheet (PDF)
Regulated outputs (#):

3
Vin (min) (V):

2.8
Vin (max) (V):

5.5
Iout (max) (A):

3.5
EDA/CAD Models:

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LP87702DRHBTQ1 General Description

The LP87702-Q1helps 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 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.

Key Features

AEC-Q100 Qualified for Automotive Applications:
- Device Temperature Grade 1: –40°C to +125°C, T_A
Functional Safety Quality-Managed
- Documentation Available to Aid Functional Safety System Design
- Two Inputs for External Voltage Monitoring
- Two Programmable Power-Good Signals
- Dedicated Reference Voltage for Diagnostics
- Window Watchdog with Reset Output
- Output Short-Circuit and Overload Protection
- Overtemperature Warning and Protection
- Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)
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
- Maximum Output Current 600 mA
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

Specifications

Regulated outputs (#)	3	TI functional safety category	Functional Safety Quality-Managed
Vin (min) (V)	2.8	Vin (max) (V)	5.5
Iout (max) (A)	3.5	Configurability	Factory programmable, Software configurable
Rating	Automotive	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	Switching frequency (max) (kHz)	4000
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	Operating temperature range (°C)	-40 to 125
Processor name	mmWave AWR, mmWave IWR	Processor supplier	Texas Instruments
Shutdown current (ISD) (typ) (µA)	1	Switching frequency (typ) (kHz)	2000