The ISL8022 is a high efficiency, dual synchronous step-down DC/DC regulator that can deliver up to 2A/1. 7A continuous output current per channel. The channels are 180° out-of-phase for input RMS current and EMI reduction. The supply voltage range of 2. 8V to 5. 5V allows for the use of a single Li+ cell, three NiMH cells or a regulated 5V input. The current mode control architecture enables very low duty cycle operation at high frequency with fast transient response and excellent loop stability. The ISL8022 operates at 2. 25MHz switching frequency allowing for the use of small, low cost inductors and capacitors. Each channel is optimized for generating an output voltage as low as 0. 6V. The ISL8022 has a user configurable mode of operation-forced PWM mode and PFM/PWM mode. The forced PWM mode operation reduces noise and RF interference while the PFM mode operation provides high efficiency by reducing switching losses at light loads. In PFM mode of operation, both channels draw a total quiescent current of only 40µA, hence enabling high light load efficiency in order to maximize battery life. The ISL8022 offers a 1ms Power-Good (PG) to monitor both outputs at power-up. When shutdown, ISL8022 discharges the outputs capacitor. Other features include internal digital soft-start, enable for power sequence, overcurrent protection, and thermal shutdown. The ISL8022 is offered in a 4mmx3mm 12 Ld DFN package with 1mm maximum height. The complete converter occupies less than 1. 8cm2 area.

Features

  • Dual 2A/1.7A high efficiency synchronous buck regulator with up to 97% efficiency, low iq (40µA)
  • 180° out-of-phase
  • Start-up with pre-biased output
  • Selectable forced PWM mode and PFM mode
  • External synchronization up to 8MHz
  • Negative current detection and protection
  • 100% maximum duty cycle for lowest dropout
  • Internal current mode compensation
  • Peak current limiting, hiccup mode short circuit protection and over-temperature protection
  • Pb-free (RoHs compliant)

Applications

  • DC/DC POL modules
  • µC/µP, FPGA and DSP power
  • Plug-in DC/DC modules for routers and switchers
  • Test and measurement systems
  • Li-ion battery powered devices
  • Bar code readers

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active DFN Tube 75
Availability
Active DFN Reel 6000
Availability
Active DFN Reel 250
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL8022 Datasheet 日本語 Datasheet PDF 1.48 MB
User Guides & Manuals
ISL8022EVAL2Z User Guide Manual PDF 243 KB
ISL8022EVAL1Z User Guide Manual PDF 526 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN9208: High Frequency Power Converters Application Note PDF 592 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
AN9210: A New Pspice Subcircuit For The Power MOSFET Featuring Global Temperature Options Application Note PDF 650 KB
AN9209: A Spice-2 Subcircuit Representation For Power MOSFETs Using Empirical Methods Application Note PDF 387 KB
AN7244: Understanding Power MOSFETs Application Note PDF 349 KB
Downloads
ISL8022EVAL2Z Design Files Design File ZIP 190 KB
ISL8022EVAL1Z Design Files Design File ZIP 238 KB

Boards & Kits

Part Number Title Type Company
ISL8022EVAL1Z Dual 2A/1.7A Low Quiescent Current 2.25MHz Synchronous Buck Regulator Evaluation Board Evaluation Renesas
ISL8022EVAL2Z Dual 2A/1.7A Low Quiescent Current 2.25MHz Synchronous Buck Regulator Evaluation Board Evaluation Renesas