The ISL85005 and ISL85005A are monolithic, synchronous buck regulators with integrated 5A, 18V high-side and low-side FETs. These devices provide an integrated bootstrap diode for the high-side gate driver to reduce the external parts count. These devices also have a wide input voltage range to support applications with input voltage from multi-cell batteries or regulated 5V and 12V power rails. The ISL85005 and ISL85005A regulate the output voltage with current mode control and have an internal oscillator. The switching frequency of the ISL85005 is internally set as 500kHz, and can be synchronized to an external clock signal with frequency ranges from 300kHz to 2MHz. The ISL85005A has a fixed 500kHz switching frequency. The ISL85005 has a fixed 2. 3ms soft-start, while the ISL85005A features programmable soft-start to limit inrush current during startup. With the SS pin floating, the soft-start time of ISL85005A is also 2. 3ms. The ISL85005 can be configured in either forced Continuous Conduction Mode (CCM) or Diode Emulation Mode (DEM). DEM enables high efficiency at light-load conditions. The ISL85005A always operates in forced CCM. The ISL85005 and ISL85005A have built-in protections including input UVLO protection, input and output overvoltage protection, high-side cycle-by-cycle current limit, low-side forward current limit and reverse current limit, and thermal shutdown.

Features

  • 4.5V to 18V input voltage range
  • Internal 5A, 18V high-side and low-side MOSFET switches
  • ±1%, 0.8V feedback voltage reference
  • Integrated bootstrap diode with undervoltage detection
  • Current mode control with internal slope compensation
  • Internal or external compensation options
  • Default internally set 500kHz switching frequency
  • Synchronization capability to external clock (ISL85005)
  • Diode Emulation Mode (DEM) and Forced CCM (FCCM) options (ISL85005)
  • Adjustable soft-start time (ISL85005A)
  • Output Power-Good (PG) indicator
  • Input Undervoltage Lockout (UVLO), input and output overvoltage protection
  • High-side cycle-by-cycle current limit, low-side forward and reverse overcurrent protection, and thermal shutdown
  • Small 12-pin 3mmx4mm Dual Flat No-Lead (DFN) package with EPAD for enhanced thermal performance

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
Active DFN Reel 1000
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL85005, ISL85005A Datasheet Datasheet PDF 1.32 MB
User Guides & Manuals
ISL85005EVAL1Z, ISL85005AEVAL1Z User Guide Manual PDF 1.05 MB
ISL85005xDEMO1Z User Guide Manual PDF 719 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
How to Protect Buck Regulators from Overcurrent Damage White Paper PDF 378 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
ISL85005EVAL1Z Design Files Design File ZIP 805 KB
ISL85005DEMO1Z Design Files Design File ZIP 878 KB
Other
ISL85005 iSim:PE Model Schematic SXSCH 122 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
Flower-Reference-Design Flower Reference Design Featuring 4.5V - 18V Input Switching Regulator Reference Renesas
ISL85005ADEMO1Z 5A High-Efficiency Synchronous Buck Regulator Demonstration Boards Demonstration Renesas
ISL85005AEVAL1Z 5A High-Efficiency Synchronous Buck Regulator Evaluation Board Evaluation Renesas
ISL85005DEMO1Z 5A High-Efficiency Synchronous Buck Regulator Demonstration Boards Demonstration Renesas
ISL85005EVAL1Z 5A High-Efficiency Synchronous Buck Regulator Evaluation Board Evaluation Renesas