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ISL9021A

Obsolete

250mA Single LDO with Low IQ, Low Noise and High PSRR LDO

Features

  • High Performance LDO with 250mA Guaranteed Continuous Output Current
  • Input Voltage Range: 1.5V to 5.5V
  • Output Voltage Range: 1.2V to 3.3V
  • High PSRR: 75dB @ 10kHz, 50dB @ 1MHz
  • Low Quiescent Current: 35µA
  • Dropout Voltage: <150mV @ 250mA
  • Stable with 1µF to 4.7µF Output Capacitance (±30%) with an ESR range of 5mΩ to 400mΩ
  • ±1.8% Output Accuracy Over-Temperature/Load/Line
  • Soft-start Limits Input Current Surge During Enable
  • Current Limit and Overheat Protection
  • -40°C to +85°C Operating Temperature Range
  • Available in 0.975mmx1.155mm 4-bump WLCSP Package and 1.6mmx1.6mm 6 Ld µTDFN
  • Pb-free (RoHS compliant)
Find Other Products in Linear Regulators (LDO)
ISL9021A Functional Diagram
ISL9021A Functional Diagram

Description

The ISL9021A is a single LDO, which provides high performance, low input voltage and high PSRR. It delivers guaranteed continuous 250mA load current and is stable with 1µF to 4. 7µF of output capacitance (±30%) with an ESR range of 5mΩ to 400mΩ. The input voltage range for the ISL9021A is between 1. 5V to 5. 5V and the output voltage comes in many fixed voltage options with ±1. 8% accuracy over-temperature, line and load ranges. The ISL9021A has typical PSRR of 75dB @ 10kHz and 50dB @ 1MHz. The reverse current protection feature prevents current from flowing back to the power source when the output voltage is pulled higher than the input. The ISL9021A is offered in tiny 4-bump 0. 975mmx1. 155mm WLCSP and 1. 6mmx1. 6mm 6 Ld µTDFN packages.

Applications

  • PDAs, Cell Phones and Smart Phones
  • Portable Instruments, MP3 Players
  • Handheld Devices including Medical Handhelds
Part NumberStatusSamplesStockRoHSPackageLead Count (#)Carrier TypeMoisture Sensitivity Level (MSL)Pitch (mm)Pkg. Dimensions (mm)Pb (Lead) FreePb Free CategoryTemp. Range (°C)
ISL9021AIIBZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIICZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIIFZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIIKZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIIMZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIINZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIIUZ-TObsoleteN/AOut of StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIIWZ-TObsoleteN/AIn StockContactWLCSP-BP4#Reel10.4mm1.0 x 1.2 x 0.30YesPb-Free Ball Terminal (SAC405)-e1-40 to +85°C
ISL9021AIRUBZ-TObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUBZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUCZ-TObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUCZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUFZ-TObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUFZ-T7AObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUJZ-TObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUJZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUKZ-TObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUKZ-T7AObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUMZ-TObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUMZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUNZ-TObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUNZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUWZ-TObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUWZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUYZ-TObsoleteN/AOut of StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
ISL9021AIRUYZ-T7AObsoleteN/AIn StockRoHS:EN
uTDFN6#Reel10.5mm1.6 x 1.6 x 0.00YesNickel/Palladium/Gold-e4-40 to +85°C
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    Recommended Documents (1)

  1. Datasheet
    ISL9021A Datasheet
    RECOMMENDED
    PDF 625 KB isl9021a Jun 03, 2009

    Datasheets (1)

  1. Datasheet
    ISL9021A Datasheet
    RECOMMENDED
    PDF 625 KB isl9021a Jun 03, 2009

    Manuals & Guides (1)

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    Application Notes & White Papers (2)

  1. Application Note
    AN1684: Nonideality of Ground
    PDF 397 KB an1684 Jan 19, 2004
    AI-generated Summary: The document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design and safety, disclaims liability for damages, and clarifies no intellectual property licenses are granted. Products are categorized by quality grades with specific application recommendations. Users must comply with laws, avoid unauthorized modifications, and ensure safe use within specified conditions. Contact details for Renesas Electronics sales offices worldwide are provided.
  2. Application Note
    AN1681: Grounding Techniques
    PDF 509 KB an1681 Jan 19, 2004
    AI-generated Summary: The document explains grounding techniques for PCB layouts using a dual op amp example on a single-layer copper board. It compares three grounding schemes: a center spine ground trace, an outer ground plane, and a split/star ground plane, highlighting the benefits of single-point grounding to minimize noise and antenna effects. It emphasizes following current paths, minimizing loop lengths, and ensuring close forward and return paths to reduce interference. The document also includes disclaimers on product use, quality grades, safety, and legal compliance.

    Product Notices (PCN, EOL, etc) (1)

  1. Product Advisory
    PA22026 - MSL1 Packing Change for listed Renesas Products
    PDF 414 KB Aug 26, 2022

    Schematics & Design Files (1)

  1. PCB Design Files
    ISLUSPLUS-UC1DEMO1Z Design Files
    ZIP 1.8 MB islusplus-uc1demo1zbom_design Aug 28, 2018

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