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Dual-/Triple-/Quad-Voltage, Capacitor-Adjustable, Sequencing/Supervisory Circuits

Dual-/Triple-/Quad-Voltage Sequencers/Monitors with Capacitor-Adjustable Timing

Product Details

The MAX16025–MAX16030 are dual-/triple-/quad-voltage monitors and sequencers that are offered in a small TQFN package. These devices offer enormous design flexibility as they allow fixed and adjustable thresholds to be selected through logic inputs and provide sequence timing through small external capacitors. These versatile devices are ideal for use in a wide variety of multivoltage applications.

As the voltage at each monitored input exceeds its respective threshold, its corresponding output goes high after a propagation delay or a capacitor-set time delay. When a voltage falls below its threshold, its respective output goes low after a propagation delay. Each detector circuit also includes its own enable input, allowing the power-good outputs to be shut off independently. The independent output for each detector is available with push-pull or open-drain configuration with the open-drain version capable of supporting voltages up to 28V, thereby allowing them to interface to shutdown and enable inputs of various DC-DC regulators. Each detector can operate independently as four separate supervisory circuits or can be daisy-chained to provide controlled power-supply sequencing.

The MAX16025–MAX16030 also include a reset function that deasserts only after all of the independently monitored voltages exceed their threshold. The reset timeout is internally fixed or can be adjusted externally. These devices are offered in a 4mm x 4mm TQFN package and are fully specified from -40°C to +125°C.

Key Features

  • 2.2V to 28V Operating Voltage Range
  • Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems
  • 1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V
  • 2.7% Accurate Fixed Thresholds Over Temperature
  • Fixed (140ms min)/Capacitor-Adjustable Delay Timing
  • Independent Open-Drain/Push-Pull Outputs
  • Enable Inputs for Each Monitored Voltage
  • 9 Logic-Selectable Threshold Options
  • Manual Reset and Tolerance Select (5%/10%) Inputs
  • Small, 4mm x 4mm TQFN Package
  • Fully Specified from -40°C to +125°C

Applications/Uses

  • DC-DC Supplies
  • Multivoltage Systems
  • Networking/Telecommunication Equipment
  • Servers/Workstations
  • Storage Systems
Parametric specs for Supervisors (2 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
>=5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Open Drain
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
High Voltage (>6V)
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 75
Package/Pins TQFN/16
Parametric specs for Supervisors (4 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
>=5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Open Drain
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
High Voltage (>6V)
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 75
Package/Pins TQFN/24
Budgetary
Price (See Notes)
-
View More
Parametric specs for Supervisors (3 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
>=5.5
Reset Thresh. Accur. (%) (@ +25°C) 1.5
Reset Out Active Low
Push-Pull
tRESET (min) 1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
High Voltage (>6V)
Manual Reset
Power Fail Comparator/Low Battery Detect
ICC (µA) (max) 75
Package/Pins TQFN/20
View More
Parametric specs for Power-Supply Sequencers and Voltage Trackers
# Input Channels 3
Interface Factory Fixed
R/C Adjustable
Option Sequence
VIN (V) (max) <6
>6
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN/20
Budgetary
Price (See Notes)
$2.44 @1k
View More

Simplified Block Diagram

MAX16025, MAX16026, MAX16027, MAX16028, MAX16029, MAX16030: Typical Operating Circuit MAX16025, MAX16026, MAX16027, MAX16028, MAX16029, MAX16030: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX16029 evaluation kit (EV kit) is designed to evaluate the MAX16029 quad-voltage, capacitor-adjustable, sequencing/supervisory circuit. The kit includes a fully assembled and tested PCB that allows easy access to all major functions of the part, including the inputs, timeout-delay capacitors, and outputs.

The MAX16029 EV kit comes with the MAX16029 installed, but can also be used to evaluate the MAX16030 and MAX16043.

View Details

Features

  • Easy Configuration with Jumpers
  • Input Connections Include Pads for Resistive Dividers
  • Master Reset Pushbutton
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    Search our knowledge base for answers to your technical questions.

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    Parameters

    Parametric specs for Supervisors (2 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
    >=5.5
    Reset Thresh. Accur. (%) (@ +25°C) 1.5
    Reset Out Active Low
    Open Drain
    tRESET (min) 1ms to 15ms
    15ms to 85ms
    85ms to 300ms
    300ms to 1s
    <1ms
    >1s
    Adjustable
    Watchdog Feature No Watchdog
    Supervisor Features Adjustable Reset Input
    High Voltage (>6V)
    Manual Reset
    Power Fail Comparator/Low Battery Detect
    ICC (µA) (max) 75
    Package/Pins TQFN/16
    Parametric specs for Supervisors (4 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
    >=5.5
    Reset Thresh. Accur. (%) (@ +25°C) 1.5
    Reset Out Active Low
    Open Drain
    tRESET (min) 1ms to 15ms
    15ms to 85ms
    85ms to 300ms
    300ms to 1s
    <1ms
    >1s
    Adjustable
    Watchdog Feature No Watchdog
    Supervisor Features Adjustable Reset Input
    High Voltage (>6V)
    Manual Reset
    Power Fail Comparator/Low Battery Detect
    ICC (µA) (max) 75
    Package/Pins TQFN/24
    Budgetary
    Price (See Notes)
    -
    Parametric specs for Supervisors (3 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
    >=5.5
    Reset Thresh. Accur. (%) (@ +25°C) 1.5
    Reset Out Active Low
    Push-Pull
    tRESET (min) 1ms to 15ms
    15ms to 85ms
    85ms to 300ms
    300ms to 1s
    <1ms
    >1s
    Adjustable
    Watchdog Feature No Watchdog
    Supervisor Features Adjustable Reset Input
    High Voltage (>6V)
    Manual Reset
    Power Fail Comparator/Low Battery Detect
    ICC (µA) (max) 75
    Package/Pins TQFN/20
    Parametric specs for Power-Supply Sequencers and Voltage Trackers
    # Input Channels 3
    Interface Factory Fixed
    R/C Adjustable
    Option Sequence
    VIN (V) (max) <6
    >6
    Oper. Temp. (°C) -40 to +125
    Package/Pins TQFN/20
    Budgetary
    Price (See Notes)
    $2.44 @1k

    Key Features

    • 2.2V to 28V Operating Voltage Range
    • Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems
    • 1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V
    • 2.7% Accurate Fixed Thresholds Over Temperature
    • Fixed (140ms min)/Capacitor-Adjustable Delay Timing
    • Independent Open-Drain/Push-Pull Outputs
    • Enable Inputs for Each Monitored Voltage
    • 9 Logic-Selectable Threshold Options
    • Manual Reset and Tolerance Select (5%/10%) Inputs
    • Small, 4mm x 4mm TQFN Package
    • Fully Specified from -40°C to +125°C

    Applications/Uses

    • DC-DC Supplies
    • Multivoltage Systems
    • Networking/Telecommunication Equipment
    • Servers/Workstations
    • Storage Systems

    Description

    The MAX16025–MAX16030 are dual-/triple-/quad-voltage monitors and sequencers that are offered in a small TQFN package. These devices offer enormous design flexibility as they allow fixed and adjustable thresholds to be selected through logic inputs and provide sequence timing through small external capacitors. These versatile devices are ideal for use in a wide variety of multivoltage applications.

    As the voltage at each monitored input exceeds its respective threshold, its corresponding output goes high after a propagation delay or a capacitor-set time delay. When a voltage falls below its threshold, its respective output goes low after a propagation delay. Each detector circuit also includes its own enable input, allowing the power-good outputs to be shut off independently. The independent output for each detector is available with push-pull or open-drain configuration with the open-drain version capable of supporting voltages up to 28V, thereby allowing them to interface to shutdown and enable inputs of various DC-DC regulators. Each detector can operate independently as four separate supervisory circuits or can be daisy-chained to provide controlled power-supply sequencing.

    The MAX16025–MAX16030 also include a reset function that deasserts only after all of the independently monitored voltages exceed their threshold. The reset timeout is internally fixed or can be adjusted externally. These devices are offered in a 4mm x 4mm TQFN package and are fully specified from -40°C to +125°C.

    Simplified Block Diagram

    MAX16025, MAX16026, MAX16027, MAX16028, MAX16029, MAX16030: Typical Operating Circuit MAX16025, MAX16026, MAX16027, MAX16028, MAX16029, MAX16030: Typical Operating Circuit Zoom icon

    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