SNVSCH5 November   2023 LP87745

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Description (continued)
  6. 5Pin Configuration and Functions
  7. 6Device and Documentation Support
    1. 6.1 Documentation Support
    2. 6.2 Receiving Notification of Documentation Updates
    3. 6.3 Support Resources
    4. 6.4 Trademarks
    5. 6.5 Electrostatic Discharge Caution
    6. 6.6 Glossary
  8. 7Revision History
  9. 8Mechanical, Packaging, and Orderable Information
    1. 8.1 Packaging Option Addendum
    2. 8.2 Tape and Reel Information
    3.     18

Package Options

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

3 Description

The LP8774x device is designed to meet the power management requirements of the IWR MMICs in various 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. The high switching frequency 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.

Package Information
PART NUMBER(1) PACKAGE PACKAGE SIZE(2) BODY SIZE (NOM)
LP8774x RXV (VQFN-HR, 28) 4.50 mm × 5.00 mm 4.50 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
GUID-20200922-CA0I-Q597-W6RR-J87QTS4FMMTP-low.svg Simplified Application