The ISL81601 is a true bidirectional 4-switch synchronous buck-boost controller with peak and average current sensing and monitoring at both ends. Its wide input and output voltage ranges make it suitable for industrial, telecommunication, and after-market automotive applications.

The ISL81601 uses the proprietary buck-boost control algorithm with valley current modulation for Boost mode and peak current modulation for Buck mode control. The ISL81601 has four independent control loops for input and output voltages and currents. Inherent peak current sensing at both ends and cycle-by-cycle current limit of this family of products ensures high operational reliability by providing instant current limit in fast transient conditions at either end and in both directions. It also has two current monitoring pins at both input and output to facilitate Constant Current (CC) limit and other system management functions. CC operation down to low voltages avoids any runaway condition at overload or short-circuit conditions.

In addition to multilayer overcurrent protection, it also provides full protection features such as OVP, UVP, OTP, and average and peak current limit on both input and output to ensure high reliability in both unidirectional and bidirectional operation. The IC is packaged in a space-conscious 32 Ld 5mm x 5mm QFN package or easy to assemble 4. 4mm x 9. 7mm 38 Ld HTSSOP package. Both packages use an EPAD to improve thermal dissipation and noise immunity. Low pin count, fewer external components, and default internal values make the ISL81601 an ideal solution for quick-to-market simple power supply designs. The unique DE/Burst mode at light-load dramatically lowers standby power consumption with consistent output ripple over different load levels.

Features

  • Single inductor 4-switch buck-boost controller
  • On-the-fly bidirectional operation with independent control of voltage and current on both ends
  • Proprietary algorithm for smoothest mode transition MOSFET drivers with adaptive shoot-through protection
  • Wide input voltage range: 4.5V to 60V
  • Wide output voltage range: 0.8V to 60V
  • Supports pre-biased output with SR soft-start
  • Programmable frequency: 100kHz to 600kHz
  • Supports parallel operation current sharing with cascade phase interleaving
  • External sync with clock out or frequency dithering
  • External bias for higher efficiency supports 8V - 36V input
  • Output and input current monitor
  • Selectable PWM mode operation between PWM/DE/Burst modes
  • Accurate EN/UVLO and PGOOD indicator
  • Low shutdown current: 2.7µA
  • Complete protection: OCP, SCP, OVP, OTP, and UVP
    • Dual-level OCP protection with average current and pulse-by-pulse peak current limit
    • Selectable OCP response with either hiccup or constant current mode
    • Negative pulse-by-pulse peak current limit

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 60
Availability
Active QFN Reel 6000
Availability
Active QFN Reel 250
Availability
Active TSSOP-EP Tube 1000
Availability
Active TSSOP-EP Reel 2500
Availability
Active TSSOP-EP Reel 250
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL81601 Datasheet 日本語 Datasheet PDF 2.27 MB
Application Notes & White Papers
Design Considerations for a Bidirectional DC/DC Converter 日本語, 简体中文 White Paper PDF 759 KB
Achieve up to 99% Efficiency in a Robust Battery Backup System Using a True Bidirectional Buck-Boost Controller 日本語, 简体中文 White Paper PDF 351 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
Other
ISL81601 60Vin 5Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 60Vin 48Vout 10A iSim:PE Model Schematic SXSCH 512 KB
ISL81601 60Vin 24Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 60Vin 12Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 5Vin 24Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 5Vin 12Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 5.1Vin 5Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 48Vin 5Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 48Vin 24Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 48Vin 12Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 24Vin 5Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 24Vin 48Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 24Vin 12Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 12Vin 5Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 12Vin 24Vout 10A iSim:PE Model Schematic SXSCH 383 KB
ISL81601 iSim:PE Model Schematic SXSCH 383 KB
Industrial Power Management Brochure ( R16CL0001EJ0200 ) 日本語 Brochure PDF 3.13 MB

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
ISL81601EVAL1Z High Voltage Buck-Boost Controller Evaluation Board Evaluation Renesas
ISL81601EVAL2Z High Voltage Buck-Boost Controller Evaluation Board Evaluation Renesas
ISL81601DEMO1Z High Voltage Buck-Boost Controller Demonstration Board Demonstration Renesas
ISL81601DEMO2Z High Voltage Buck-Boost Controller Demonstration Board Demonstration Renesas