Datasheet MAX20480 (Analog Devices)

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MAX20480 Four- to Seven-Input Automotive Power- System Monitor Family General Description Benefits and Features
The MAX20480 is a complete ASIL-compliant SoC pow- ● Small Solution ersystem monitor with up to seven voltage monitor inputs. • 2.35V to 5.50V Operating Supply Voltage Each input has programmable OV/UV thresholds of be- • Only One External Component Required tween 2.5% and 10% with ±1% accuracy. Two of the in- • 150μA Operating Current puts have a separate remote ground-sense input and sup- • 8μA Power-Down Mode port DVS through the integrated I2C interface. ● High Precision The MAX20480 contains a programmable flexible power • Selectable 102.5% to 110% OV Monitors sequence recorder (FPSR). This recorder stores power-up • Selectable 97.5% to 90% UV Monitors and power-down timestamps separately, and supports on/ • ±1% Accuracy off and sleep/standby power sequences. The MAX20480 • 0.5% Step Size also contains a programmable challenge/response watch- • ASIL-D Compliance dog, which is accessible through the I2C interface, along ● Highly Integrated with a configurable RESET output. • Five Fixed-Voltage Monitoring Inputs The MAX20480 improves reliability while significantly re- • Two Differential DVS Tracking-Voltage Monitoring ducing system size and component count, compared to Inputs with Remote-Ground Sense separate ICs or discrete components. The MAX20480 • Power-Sequencing Recording meets ASIL-D reliability when used with a supervisory • Simple or Challenge/Response Windowed controller. The device is designed to operate over the am- Watchdog bient temperature range of -40°C to +125°C. • Fault Recording • CRC on I2C Interface
Applications
• Programmable I2C Address ● ADAS • OTP Configuration with Error-Correcting Code and ● Autonomous Driving Processing Systems Reload Functionality ● Remote Sensor Modules • Programmable RESET Pin ● Power System Supervision and MCU/SoC Monitoring ● 16-Pin Side-Wettable TQFN with Exposed Pad (3mm x 3mm) ● AEC-Q100 Qualified ● 40°C to +125°C Operating Temperature
Ordering Information appears at end of data sheet.
19-100398; Rev 9; 9/20 Document Outline General Description Applications Benefits and Features Simplified Block Diagram Absolute Maximum Ratings Package Information 16-TQFN-EP Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Typical Operating Characteristics (continued) Pin Configurations MAX20480A MAX20480B MAX20480C MAX20480D Pin Description Pin Description (continued) Functional Diagram Detailed Description I2C Interface Bit Transfer STOP and START Conditions Early STOP Condition Clock Stretching I2C General Call Address Packet Error Checking (PEC) Slave Address Acknowledge Write-Data Format Read-Data Format Voltage Monitor DVS Operation DVS Command Sequence (Low to High): DVS Command Sequence (High to Low): I2C DVS Timing Example (Low to High) Flexible Power Sequence Recorder Windowed Watchdog and Reset Control Sample C Code For Challenge/Response Watchdog Window Settings RESET Output Enable Inputs (EN0/EN1) Comparator Power States Register Map Top Level Register Details ID (0x00) CONFIG1 (0x01) CONFIG2 (0x02) VMON (0x03) RSTMAP (0x4) STATOV (0x5) STATUV (0x6) STATOFF (0x7) VIN1 (0x8) VIN2 (0x9) VIN3 (0xA) VIN4 (0xB) VIN5 (0xC) VINO6 (0xD) VINU6 (0xE) VINO7 (0xF) VINU7 (0x10) OVUV1 (0x11) OVUV2 (0x12) OVUV3 (0x13) OVUV4 (0x14) OVUV5 (0x15) FPSSTAT1 (0x16) FPSCFG1 (0x17) UTIME1 (0x18) UTIME2 (0x19) UTIME3 (0x1A) UTIME4 (0x1B) UTIME5 (0x1C) UTIME6 (0x1D) UTIME7 (0x1E) DTIME1 (0x1F) DTIME2 (0x20) DTIME3 (0x21) DTIME4 (0x22) DTIME5 (0x23) DTIME6 (0x24) DTIME7 (0x25) WDSTAT (0x26) WDCDIV (0x27) WDCFG1 (0x28) WDCFG2 (0x29) WDKEY (0x2A) WDLOCK (0x2B) RSTCTRL (0x2C) CID (0x2D) Applications Information Diagnostics Typical Application Circuit Ordering Information Revision History