SNVSCM1 september   2023 LM70880-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Revision History
  6. 5Description (continued)
  7. 6Device and Documentation Support
    1. 6.1 Device Support
      1. 6.1.1 Development Support
    2. 6.2 Documentation Support
      1. 6.2.1 Related Documentation
        1. 6.2.1.1 PCB Layout Resources
        2. 6.2.1.2 Thermal Design Resources
    3. 6.3 Receiving Notification of Documentation Updates
    4. 6.4 Support Resources
    5. 6.5 Trademarks
    6. 6.6 Electrostatic Discharge Caution
    7. 6.7 Glossary
  8. 7Mechanical, Packaging, and Orderable Information
    1. 7.1 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
  • RRX|29
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The LM70880-Q1 is a compact, easy-to-use, 4.5-V to 80-V, ultra-low IQ, synchronous step-down DC/DC converter featuring a versatile buck controller and a pair of power MOSFETs designed for delivering of up to 8 A of output current at fixed output voltages of 3.3 V, 5 V, 12 V, or an adjustable output.

The converter uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM70880-Q1 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16 A of output current.

The LM70880-Q1 features a unique Dual Random Spread Spectrum (DRSS) function that combines a low-frequency triangular modulation with a high-frequency cycle-by-cycle random modulation for improved EMI performance across a high range of radio frequency bands.

Device Information
PART NUMBERPACKAGE(1)PACKAGE SIZE(2)
LM70880-Q1RRX (QFN, 29)6 mm × 6 mm
LM70860-Q1(3)
LM70840-Q1(3)
(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.
(3) Preview information (not Advance Information)
GUID-20201008-CA0I-FXHW-QD0G-H0SRGTKLGZXW-low.svgTypical Application Circuit
GUID-20230831-SS0I-PGWB-CJCQ-Q1MTGQKF1ZMR-low.svgFigure 3-1 Typical Application Circuit Efficiency VOUT = 12 V, fSW = 400 kHz