LP8733 Dual high-current buck converters and dual linear regulators | TI.com

LP8733
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Dual high-current buck converters and dual linear regulators

 

Description

The LP8733xx is designed to meet the power management requirements in industrial applications. The device has two step-down DC/DC converters which can be configured as a single dual-phase regulator or two single-phase regulators, two linear regulators, and two 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 together with the automatic phase adding/shedding gives high efficiency over a wide output-current range. The LP8733xx supports remote voltage sensing (differential in dual-phase configuration) 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 LP8733xx 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.

Features

  • Device operating temperature range: –40°C to +125°C ambient 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 3 A per phase
    • Auto phase adding/shedding and force multi-phase operations in dual-phase configuration
    • Remote differential feedback voltage sensing in dual-phase configuration
    • 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

All trademarks are the property of their respective owners.

Parametrics

Compare all products in Multi-channel ICs (PMIC) Email Download to Excel
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 Rating Operating temperature range (C) Configurability Package Group Package size: mm2:W x L (PKG)
LP8733 Order now 4     NXP     i.MX 8M Mini     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    
Catalog     -40 to 125     Factory programmable
Software configurable    
VQFN | 28     28VQFN: 25 mm2: 5 x 5 (VQFN | 28)    
LP87332D Order now 4     Texas Instruments     AM570x     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    
Catalog     -40 to 125     Factory programmable
Software configurable    
VQFN | 28     28VQFN: 25 mm2: 5 x 5 (VQFN | 28)