LP873222-Q1 Dual High-Current Buck Converters and Lnr Regulators - LP873222-Q1

LP873222-Q1 (正在供货)

LP873222-Q1 Dual High-Current Buck Converters and Lnr Regulators

 

描述

The LP873222-Q1 is designed to meet the power management requirements in automotive applications. The device contains two step-down DC-DC converters and two linear regulators and 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 LP873222-Q1 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 LP873222-Q1 device supports programmable start-up and shutdown delays and sequences including GPO signals synchronized to the enable signal. During start-up and voltage change, the device controls the output slew rate to minimize output voltage overshoot and the in-rush current.

特性

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating 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

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Regulated Outputs (#)
Processor Supplier
Processor Name
Vin (Min) (V)
Vin (Max) (V)
LDO
Step-Down DC/DC Converter
Iout (Max) (A)
Features
Rating
Operating Temperature Range (C)
Pin/Package
LP873222-Q1 LP87332B-Q1
4    4   
Renesas    Renesas   
RCAR-E2    RCAR-E2   
2.8    2.8   
5.5    5.5   
2    2   
2    2   
2    3   
Enable Pin
I2C Control
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Adjustable   
Enable Pin
I2C Control
Power Good
Power Sequencing
Spread-Spectrum Clock (SSC) Generation
Thermal Shutdown
UVLO Adjustable   
Automotive    Automotive   
-40 to 125    -40 to 125   
28VQFN    28VQFN