The ISL78229 is an automotive grade (AEC-Q100 Grade 1), 2-phase 55V synchronous boost controller that simplifies the design of high power boost applications. It integrates strong half-bridge drivers, an analog/digital tracking input, comprehensive protection functions, and a PMBus interface for added control and telemetry. The ISL78229 enables a simple, modular design for systems requiring power and thermal scalability. It offers peak-current mode control for fast line response and simple compensation. Its synchronous 2-phase architecture enables it to support higher current while reducing the size of input and output capacitors. The integrated drivers feature programmable adaptive dead time control offering flexibility in power stage design. The ISL78229 offers a 90° output clock and supports 1-, 2-, and 4-phases. The ISL78229 offers a highly robust solution for the most demanding environments. Its unique soft-start control prevents large negative current even in extreme cases, such as a restart under high output prebias on high volume capacitances. It also offers two levels of cycle-by-cycle OCP, average current limiting, input OVP, output UVP/OVP, and internal OTP. A thermistor input is provided for external OTP for the power-stage elements. In the event of a fault, the ISL78229 offers individually programmable latch-off or hiccup recovery for each fault type. Also integrated are several functions that ease system design. A unique tracking input controls the output voltage, allowing it to track either a digital duty cycle (PWM) signal or an analog reference. The ISL78229 provides input average current limiting so the system can deliver transient bursts of high load current while limiting the average current to avoid overheating. The ISL78229 PMBus interface provides fault reporting, telemetry, and system control to support functional safety qualification.


  • Input/output voltage range: 5V to 55V, withstands 60V transients
  • Supports synchronous or standard boost topology
  • Peak current mode control with adjustable slope compensation
  • Secondary average current control loop
  • Integrated 5V 2A sourcing/3A sinking N-channel MOSFET drivers
  • Switching frequency: 50kHz to 1.1MHz per phase
  • External synchronization
  • Programmable minimum duty cycle
  • Programmable adaptive dead time control
  • Optional diode emulation and phase dropping
  • PWM and analog track function
  • Forced PWM operation with negative current limiting and protection
  • Comprehensive protection/fault reporting
  • Selectable hiccup or latch-off fault response
  • I2C/PMBus compatible digital interface
  • AEC-Q100 qualified, Grade 1: -40°C to +125°C
  • 6mm x 6mm 40 Ld WFQFN (Wettable Flank QFN) package

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active WFQFN Tube 50
Active WFQFN Reel 4000
Active WFQFN Reel 250


Title language Type Format File Size Date
Datasheets & Errata
ISL78229 Datasheet Datasheet PDF 3.29 MB
Production Configuration Utility v5.4.139 Software & Tools - Other ZIP 120.25 MB
PowerNavigator™ Software v5.4.139 Software & Tools - Software ZIP 96.49 MB
User Guides & Manuals
ISLUSBEVAL1Z User's Manual Manual - Development Tools PDF 257 KB
Application Notes & White Papers
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
How to Efficiently Boost Power in High Voltage Automotive Applications White Paper PDF 434 KB
Industrial Power Management Brochure ( R16CL0001EJ0200 ) 日本語 Brochure PDF 3.13 MB
ISL78229EV1Z Design Files Design File ZIP 1.70 MB
PowerNavigator User Guide for POL Manual PDF 4.68 MB
Production Configuration Utility User Guide Manual PDF 714 KB
ISL78229EV1Z User Guide Manual PDF 2.64 MB
ZLUSBEVAL3Z User Guide Manual PDF 393 KB
ISL78229 iSim:PE Model Schematic SXSCH 340 KB


Title language Type Format File Size Date
Production Configuration Utility v5.4.139 Software & Tools - Other ZIP 120.25 MB
PowerNavigator™ Software v5.4.139 Software & Tools - Software ZIP 96.49 MB

Software & Tool Pages

Title Type Description Company
PowerNavigator Software Software Package Renesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface. Renesas
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
ISL78227EV1Z 2-Phase Boost Controller Evaluation Board Evaluation Renesas
ISL78229EV1Z 2-Phase Boost Controller Evaluation Board Evaluation Renesas