SNVSC48A October   2021  – November 2022 LP87745-Q1

PRODUCTION DATA  

  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 Documentation Support
    2. 7.2 Receiving Notification of Documentation Updates
    3. 7.3 Support Resources
    4. 7.4 Trademarks
    5. 7.5 Electrostatic Discharge Caution
    6. 7.6 Glossary
  8. 8Mechanical, Packaging, and Orderable Information
    1. 8.1 Packaging Option Addendum
    2. 8.2 Tape and Reel Information
    3.     17

Package Options

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

3 Description

The LP87745-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 or 3.3 V LDO. The LDO is powered from the boost and intended for xWR I/O supply. An SPI serial interface and enable signals control the device.

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 device forces the switching clock into PWM mode for optimal RF performance and can also be synchronized to an external clock. The 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) PACKAGE BODY SIZE (NOM)
LP87745-Q1 VQFN-HR (28) 4.50 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Application