The ISL8205M power module is a single channel synchronous step-down complete power supply, capable of delivering up to 5A of continuous current. Operating from a single 2. 6V to 5. 5V input power rail and integrating controller, power inductor and MOSFETs, the ISL8205M only requires a few external components to operate and is optimized for space constrained and portable battery operated applications. Based on current mode PWM control scheme, the ISL8205M provides a fast transient response and excellent loop stability as well as a very low duty cycle with an adjustable output voltage as low as 0. 6V and better than 1. 6% accuracy over line and load conditions. Operation frequency is selectable through an external resistor, with a 1. 8MHz default setting, or may be synchronized with an external clock signal up to 3. 5MHz. The ISL8205M also implements a selectable PFM mode to improve light-load efficiency and a 100% duty cycle LDO mode to extend battery life. A programmable soft-start reduces the inrush current required from the input supply while an automatic output discharge ensures a soft stop. Dedicated enable pin and power-good flag allow for easy system power rails sequencing. An array of protection features, including input Undervoltage Lockout (UVLO), over-temperature, overcurrent/short-circuit with hiccup mode, overvoltage and negative overcurrent, guarantees safe operations under abnormal operating conditions. The ISL8205M is available in a compact RoHS compliant 22 Ld 4. 5x7. 5x1. 85mm QFN package.


  • 5A single channel complete power supply
  • Integrates controller, MOSFETs and inductor
  • Pin/function compatible with the 3A ISL8202M
  • 2.6V to 5.5V input voltage range
  • Adjustable output voltage range
  • As low as 0.6V with ±1.6% accuracy over line/load/temperature
  • Up to 95% efficiency
  • Default 1.8MHz current mode control operations
  • 680kHz to 3.5MHz resistor adjustable
  • External synchronization up to 3.5MHz
  • Selectable light-load efficiency mode
  • 100% duty cycle LDO mode
  • Programmable soft-start
  • Soft-stop output discharge
  • Dedicated enable pin and power-good flag
  • UVLO, over-temperature, overcurrent, overvoltage and negative overcurrent protections
  • Overcurrent/short-circuit hiccup mode
  • 4.5mmx7.5mmx1.85mm 22 Ld QFN package

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active Module Reel 3000
Active Module Reel 250


Title language Type Format File Size Date
Datasheets & Errata
ISL8205M Datasheet Datasheet PDF 1.44 MB
User Guides & Manuals
ISL8205MEVAL1Z User Guide Manual PDF 713 KB
Application Notes & White Papers
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
How Green is Your Cloud? White Paper PDF 295 KB
Power Module Board Level Reliability Report Other PDF 187 KB
ISL8205M iSim:PE Model Schematic SXSCH 227 KB


Title language Type Format File Size Date
ISL8205MEVAL1Z Design Files Design File ZIP 750 KB

Software & Tool Pages

Title Type Description Company
iSim:PE Offline Simulation Tool Simulator iSim Personal Edition (iSim:PE) speeds the design cycle and reduces risk early in any project, identifying parts that can be used in current as well as next-generation designs. Renesas

Boards & Kits

Part Number Title Type Company
ISL8205MEVAL1Z 5A Single Channel High-Efficiency DC/DC Step-Down Power Module Evaluation Board Evaluation Renesas