Powrót do: Texas Instruments

Texas Instruments LP8758-E3 Synchronous Step-Down DC-DC Converters

Texas Instruments LP8758-E3 Synchronous Step-Down DC-DC Converters are designed to meet power management requirements for low-power processors in mobile phones, network cards, and similar applications. The device contains four step-down DC-DC converter cores, providing four output voltage rails. The device is controlled by an I2C-compatible serial interface. The automatic PWM-PFM (AUTO mode) operation maximizes efficiency over a wide output current range. The Texas Instruments LP8758-E3 supports programmable start-up and shutdown sequencing synchronized to hardware enable input signal.

The protection features include short-circuit protection, current limits, input supply UVLO, and temperature warning and shutdown functions. Several error flags are provided for the device's status information. Also, the LP8758-E3 device supports load current measurement without the addition of external current sense resistors. During start-up and voltage change, the device controls the output slew rate to minimize output voltage overshoot and inrush current.

Features

  • Fully integrated quad buck, up to 4A programmable maximum output current per buck
    • Auto PWM-PFM and Forced-PWM operations
    • Programmable output voltage slew rate from 30mV/µs to 0.5mV/µs
    • 2.5V to 5.5V input voltage range
    • 0.5V to 3.36V with DVS VOUT range
  • Programmable start-up and shutdown sequencing with enable signal
  • I2C-compatible interface that supports standard (100kHz), fast (400kHz), fast+ (1MHz), and high-speed (3.4MHz) modes
  • Interrupt function with programmable masking
  • Load current measurement
  • Output short-circuit and overload protection
  • Spread-spectrum mode for EMI reduction
  • The four buck cores operate 90° out of phase, thereby reducing the input ripple current
  • Overtemperature warning and protection
  • Undervoltage Lockout (UVLO)

Applications

  • Optical modules
  • Drone systems
  • Smartphones, eBooks, and tablets
  • Solid-state drives

Functional Block Diagram

Block Diagram - Texas Instruments LP8758-E3 Synchronous Step-Down DC-DC Converters
Opublikowano: 2020-05-29 | Zaktualizowano: 2024-06-20