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Four- to Seven-Input Automotive Power-System Monitor Family

Industry's Only Auto-Qualified, ASIL-D Power-System Monitor with Challenge/Response Watchdog

Product Details

Key Features

Parametric specs for Supervisors (> 5 Monitored Voltages)
Reset Thresh. (V) 0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Out Open Drain
# Voltages Monitored 7
Interface Factory Fixed
tRESET (min) <1ms
Adjustable
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
Supervisor Features Overvoltage/Window Monitor
ICC (µA) (max) 210
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.47
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Parameters

Parametric specs for Supervisors (<u>></u> 5 Monitored Voltages)
Reset Thresh. (V) 0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Out Open Drain
# Voltages Monitored 7
Interface Factory Fixed
tRESET (min) <1ms
Adjustable
Watchdog Feature Input (WDI)
Watchdog Timeout 1s to 2s
Supervisor Features Overvoltage/Window Monitor
ICC (µA) (max) 210
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.47

Key Features

  • Small Solution
    • 2.35V to 5.50V Operating Supply Voltage
    • Only One External Component Required
    • 150µA Operating Current
    • 8µA Power-Down Mode
  • High Precision
    • Selectable 102.5% to 110% OV Monitors
    • Selectable 97.5% to 90% UV Monitors
    • ±1% Accuracy
    • 0.5% Step Size
    • ASIL-D Compliance
  • Highly Integrated
    • Five Fixed-Voltage Monitoring Inputs
    • Two Differential DVS Tracking-Voltage Monitoring Inputs with Remote-Ground Sense
    • Power-Sequencing Recording
    • Simple or Challenge/Response Windowed Watchdog
    • Fault Recording
    • CRC on I2C Interface
    • Programmable I2C Address
    • OTP Configuration with Error-Correcting Code and Reload Functionality
    • Programmable Active-Low RESET Pin
  • 16-Pin Side-Wettable TQFN with Exposed Pad (3mm x 3mm)
  • AEC-Q100 Qualified
  • -40°C to +125°C Operating Temperature

Applications/Uses

  • ADAS
  • Autonomous Driving Processing Systems
  • Power System Supervision and MCU/SoC Monitoring
  • Remote Sensor Modules

Description

The MAX20480 is a complete ASIL-compliant SoC power-system monitor with up to seven voltage monitor inputs. Each input has programmable OV/UV thresholds of between 2.5% and 10% with ±1% accuracy. Two of the inputs have a separate remote ground-sense input and support DVS through the integrated I2C interface.

The MAX20480 contains a programmable flexible power sequence recorder (FPSR). This recorder stores power-up and power-down timestamps separately, and supports on/off and sleep/standby power sequences. The MAX20480 also contains a programmable challenge/response watchdog, which is accessible through the I2C interface, along with a configurable active-low RESET output.

The MAX20480 improves reliability while significantly reducing system size and component count, compared to separate ICs or discrete components. The MAX20480 meets ASIL-D reliability when used with a supervisory controller. The device is designed to operate over the ambient temperature range of -40°C to +125°C.

Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .