60V Bidirectional 4-Switch Synchronous Buck-Boost Controller
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Overview
Description
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
Applications
Design & Development
Software & Tools
Software & Tools
| iSim:PE Offline Simulation TooliSim 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.Downloads: | Simulator | Renesas |
Boards & Kits
Boards & Kits
60V Synchronous Buck-Boost Controller Evaluation Board with 9V to 60V Vin range and 12V 10A Output
The ISL81601EVAL1Z evaluation board features the ISL81601, a 60V high voltage synchronous buck-boost controller that offers external soft-start and independent enable...
Featured Documents:
60V Synchronous Buck-Boost Controller Evaluation Board with 32V to 60V Vin range and 48V 5A Output
The ISL81601EVAL2Z evaluation board features the ISL81601, a 60V high voltage synchronous buck-boost controller that offers external soft-start and independent enable...
Featured Documents:
Parallelable 60V Sync Buck-Boost Controller Evaluation Board with 32V to 60V Vin range and 48V 10A Output
The ISL81601DEMO1Z demonstration board features the ISL81601, a 60V high voltage synchronous buck-boost controller that offers external soft-start, independent enable...
Featured Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Models
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Product Options
Processing table
| QFN | Tube | 660 | ||
ISL81601FRZ-T Active Samples Available |
QFN | Reel | 6000 | Get Samples, |
ISL81601FVEZ Active Samples Available |
TSSOP-EP | Tube | 1000 | Get Samples, |
| TSSOP-EP | Reel | 2500 |
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