The ISL6236 dual step-down, switch-mode power-supply (SMPS) controller generates logic-supply voltages in battery-powered systems. The ISL6236 include two pulse-width modulation (PWM) controllers, 5V/3. 3V and 1. 5V/1. 05V. The output of SMPS1 can also be adjusted from 0. 7V to 5. 5V. The SMPS2 output can be adjusted from 0V to 2. 5V by setting REFIN2 voltage. An optional external charge pump can be monitored through SECFB. This device features a linear regulator providing 3. 3V/5V, or adjustable from 0. 7V to 4. 5V output via LDOREFIN. The linear regulator provides up to 100mA output current with automatic linear-regulator bootstrapping to the BYP input. When in switchover, the LDO output can source up to 200mA. The ISL6236 includes on-board power-up sequencing, the power-good (POK) outputs, digital soft-start, and internal soft-stop output discharge that prevents negative voltages on shutdown. A constant ON-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic pulse-skipping mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include pulse skipping, which maximizes efficiency in light-load applications, and fixed-frequency PWM mode, which reduces RF interference in sensitive applications.

Features

  • Wide Input Voltage Range 5.5V to 25V
  • Dual Fixed 1.05V/3.3V and 1.5V/5.0V Outputs or Adjustable 0.7V to 5.5V (SMPS1) and 0V to 2.5V (SMPS2), ±1.5% Accuracy
  • Secondary Feedback Input (Maintains Charge Pump Voltage)
  • 1.7ms Digital Soft-Start and Independent Shutdown
  • Fixed 3.3V/5.0V, or Adjustable Output 0.7V to 4.5V, ±1.5% (LDO): 200mA
  • 3.3V Reference Voltage ±2.0%: 5mA
  • 2.0V Reference Voltage ±1.0%: 50µA
  • Constant ON-time Control with 100ns Load-Step Response
  • Frequency Selectable
  • rDS(ON) Current Sensing
  • Programmable Current Limit with Foldback Capability
  • Selectable PWM, Skip or Ultrasonic Mode
  • BOOT Voltage Monitor with Automatic Refresh
  • Independent POK1 and POK2 Comparators
  • Soft-Start with Pre-Biased Output and Soft-Stop
  • Independent ENABLE
  • High Efficiency - up to 97%
  • Very High Light Load Efficiency (Skip Mode)
  • 5mW Quiescent Power Dissipation
  • Thermal Shutdown
  • Extremely Low Component Count
  • Pb-Free (RoHS Compliant)

Applications

  • Notebook and Sub-Notebook Computers
  • PDAs and Mobile Communication Devices
  • 3-Cell and 4-Cell Li+ Battery-Powered Devices
  • DDR1, DDR2 and DDR3 Power Supplies
  • Graphic Cards
  • Game Consoles
  • Telecommunications

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Reel 6000
Availability
Active QFN Reel 6000
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL6236 Datasheet Datasheet PDF 3.63 MB
User Guides & Manuals
ISL6236EVAL1 User Guide Manual PDF 736 KB
ISL6236EVAL2 User Guide Manual PDF 817 KB
Application Notes & White Papers
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
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
PCNs & PDNs
PCN14036 - Wafer fabrication Site Change for Listed Intersil Products - Palm Bay, Florida Product Change Notice PDF 294 KB
PCN13025A - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li , Taiwan and STATS ChipPAC (SCM) - Kuala Lumpur, Ma Product Change Notice PDF 110 KB
PCN13025 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li , Taiwan and STATS ChipPAC (SCM) - Kuala Lumpur, Mal Product Change Notice PDF 106 KB
PCN13024 - Alternate Manufacturing Site for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering - Chung-Li, Taiwan (ASECL Product Change Notice PDF 183 KB
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump Product Change Notice PDF 173 KB
PCN10083 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia Product Change Notice PDF 79 KB
Other
PLC17007 - Q1 Cy 17 General Product Life Cycle Notice Product Life Cycle Notice PDF 292 KB

Boards & Kits

Part Number Title Type Company
ISL6236EVAL1 High-Efficiency, Quad-Output, Main Power Supply Controllers Evaluation Board Evaluation Renesas
ISL6236EVAL2 High-Efficiency, Quad-Output, Main Power Supply Controllers Evaluation Board Evaluation Renesas