SNVSC48 October   2021 LP87745-Q1

ADVANCE INFORMATION  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Revision History
  5. 5Description (continued)
  6. 6Pin Configuration and Functions
  7. 7Device and Documentation Support
    1. 7.1 Receiving Notification of Documentation Updates
    2. 7.2 Support Resources
    3. 7.3 Trademarks
    4. 7.4 Electrostatic Discharge Caution
    5. 7.5 Glossary
  8. 8Mechanical, Packaging, and Orderable Information
    1. 8.1 Packaging Option Addendum
    2. 8.2 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
  • RXV|28
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Description

The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and intended for xWR IO supply. The device is controlled by an SPI serial interface and by enable signals.

The step-down DC/DC converters support programmable switching frequency of 4.4 MHz, 8.8 MHz, or 17.6 MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. This improves thermals and transient settling for the MMIC RF rails. The switching clock is forced to PWM mode for optimal RF performance and can also be synchronized to an external clock. The LP8774x-Q1 device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage.

Device Information
PART NUMBER(1)PACKAGEBODY SIZE (NOM)
LP8774x-Q1VQFN-HR (28)4.50 mm × 5.00 mm
For all available packages, see the orderable addendum at the end of the data sheet.
GUID-797195D9-4720-434F-B313-17FE19ED35BB-low.gifSimplified Schematic