MAX6877
Info: : PRODUCTION
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MAX6877

Dual-/Triple-Voltage, Power-Supply Trackers/Sequencers/Supervisors

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.89
Features
  • Pin-Selectable Tracking or Sequencing Control for Up to Three Supply Voltages
  • Capacitor-Adjustable Power-Up/Down Tracking Slew Rate
  • Capacitor-Adjustable Power-Up Sequencing Delay
  • Internal Charge Pumps to Enhance External n-Channel FETs
  • Capacitor-Adjustable Timeout Period Power-Good Output (MAX6877/MAX6878)
  • Adjustable Undervoltage Lockout or Logic-Enable Input
  • Internal 100Ω Pulldown for Each Output to Discharge Capacitive Load Quickly
  • 0.5V to 5.5V Nominal IN_/OUT_ Range
  • 2.7V to 5.5V Operating Voltage Range
  • Immune to Short Voltage Transients
  • Small 4mm x 4mm 24-Pin or 16-Pin Thin QFN Packages
Additional Details
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The MAX6877/MAX6878/MAX6879 multivoltage power trackers/sequencers/supervisors monitor up to three system voltages and provide proper power-up and power-down control for systems requiring voltage tracking or sequencing. These devices ensure controlled voltage tracking within a specified range or sequencing in the proper order as system power supplies are enabled. The MAX6877/MAX6878/MAX6879 generate all required voltages and timing to control up to three external n-channel pass FETs for the OUT1/OUT2/OUT3 supply voltages (see the Selector Guide for different features of each device).

The MAX6877/MAX6878/MAX6879 feature adjustable undervoltage thresholds for each input supply. When all the voltages are above these adjustable thresholds, the devices turn on the external n-channel MOSFETs to either sequence or track the voltages to the system. During voltage-tracking mode, the voltage at the GATE of each MOSFET is increased to slowly bring up all supplies at a controlled slew rate. The MAX6877/MAX6878/MAX6879 feature an autoretry or latch-off mode with capacitor-adjusted timing.

These devices also provide a controlled power-down (tracking mode) when the system shuts off in an orderly manner. When an unexpected fault occurs, the outputs are all pulled down simultaneously with an internal 100Ω pulldown to help discharge capactive loads at the MOSFET's source. The MAX6877/MAX6878/MAX6879 feature independent internal charge pumps to fully enhance the external FETs for low-voltage drop at highpass current. The MAX6877 and MAX6878 also feature a power-good output with a selectable timeout period that can be used for system reset.

The MAX6877/MAX6878/MAX6879 are available in small 4mm x 4mm 24-pin and 16-pin thin QFN packages and are fully specified over the -40°C to +85°C extended operating temperature range.

Applications

  • Multivoltage Systems
  • Networking Systems
  • Servers/Workstations
  • Storage Equipment
  • Telecom
Part Models 2
1ku List Price Starting From $2.89

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX6877ETG+
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MAX6877ETG+T
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Part Models

Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX6877ETG+

PRODUCTION

MAX6877ETG+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Jun 20, 2016

- 1612

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ASSEMBLY

MAX6877ETG+

PRODUCTION

MAX6877ETG+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX6877EVKIT

Evaluation Kit for the MAX6877

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MAX6877EVKIT

Evaluation Kit for the MAX6877

Evaluation Kit for the MAX6877

Features and Benefits

  • Voltage Tracking of Up to Three Power Supplies During Power-Up/Power-Down
  • Configurable Input Voltage Thresholds Set to 1.05V, 1.58V, and 2.93V
  • Configurable Timing Parameters
  • Output Signals for Circuit Monitoring
  • Channel-Current Capability Up to 10A
  • Fully Assembled and Tested

Product Detail

The MAX6877 evaluation kit (EV kit) is a complete, fully assembled and tested multivoltage power tracker/sequencer/supervisor controller circuit that demonstrates the capability of the MAX6877 controller. The MAX6877 ensures controlled voltage tracking or sequencing of up to three power-supply outputs during power-up, and controlled voltage during power-down. Voltage tracking ensures that all output voltages of the supplies rise or fall at the same rate while voltage sequencing turns on the outputs in order once the input voltages reach stability. The EV kit circuit features active-low FAULT and PG/active-low RST output signals to indicate fault and power-good conditions, respectively. The circuit's timing parameters and voltage thresholds are reconfigurable. The EV kit board is designed to handle up to 10A per channel.

Applications

  • Multivoltage Systems
  • Networking Systems
  • Servers/Workstations
  • Storage Equipment
  • Telecom

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