Overview

The EL7531 is a synchronous, integrated FET 1A step-down regulator with internal compensation. It operates with an input voltage range from 2. 5V to 5. 5V, which accommodates supplies of 3. 3V, 5V, or a Li-Ion battery source. The output can be externally set from 0. 8V to VIN with a resistive divider. The EL7531 features automatic PFM/PWM mode control, or PWM mode only. The PWM frequency is typically 1. 4MHz and can be synchronized up to 12MHz. The typical no load quiescent current is only 120µA. Additional features include a Power-Good output, 1µA shut-down current, short-circuit protection, and over-temperature protection. The EL7531 is available in the 10-pin MSOP package, making the entire converter occupy less than 0. 15 in2 of PCB area with components on one side only. The 10-pin MSOP package is specified for operation over the full -40°C to +85°C temperature range.

EL7531 Functional Diagram
EL7531 Functional Diagram
  • Less than 0.15 in2 (0.97 cm2) footprint for the complete 1A converter
  • Components on one side of PCB
  • Max height 1.1mm MSOP10
  • Power-Good (PG) output
  • Internally-compensated voltage mode controller
  • Up to 94% efficiency
  • <1µA shut-down current
  • 120µA quiescent current
  • Overcurrent and over-temperature protection
  • External synchronizable up to 12MHz
  • Pb-Free plus anneal available (RoHS compliant)

Applications

  • PDA and pocket PC computers Bar code readers Cellular phones Portable test equipment Li-Ion battery powered devices Small form factor (SFP) modules

Documentation

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    EL7531IYZ
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 MSOP Tube 2 Get Samples,
    EL7531IYZ-T13
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    		 MSOP Reel 2 Get Samples,
    EL7531IYZ-T7
    circleActive
    memory
    spa
    view_in_ar
    Samples Available
    Buy Now
    		MSOP Reel 2 Get Samples,
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product