MAX16051
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MAX16051

Voltage Monitors/Sequencer Circuits with Reverse-Sequencing Capability

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Easy-to-Use, Four-/Five-Voltage, Power-Up/Power-Down Sequencer/Monitors

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Info: : PRODUCTION tooltip
Part Models 2
1ku List Price Starting From $6.10
Features
  • Monitor Up to 6 Voltages/Sequence Up to 5 Voltages (MAX16051)
  • Pin-Selectable Sequencing Order (MAX16050 Only)
  • Reverse-Sequencing Capability on Shutdown
  • Overvoltage Monitoring with Independent Output
  • ±1.5% Threshold Accuracy
  • 2.7V to 16V Operating Voltage Range
  • Charge Pump to Fully Enhance External n-Channel FETs
  • Capacitor-Adjustable Sequencing Delay
  • Fixed or Capacitor-Adjustable Reset Timeout
  • Internal 85mA Pulldowns for Discharging Capacitive Loads Quickly
  • Daisy-Chaining Capability to Communicate Across Multiple Devices
  • Small 4mm x 4mm, 28-Pin TQFN Package
Additional Details
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The MAX16050 monitors up to 5 voltages and sequences up to 4 voltages, while the MAX16051 monitors up to 6 voltages and sequences up to 5 voltages. These devices provide an adjustable delay as each supply is turned on and they monitor each power-supply voltage, including the input voltage VCC. When all of the voltages reach their final values and the reset delay timer expires, a power-on-reset (active-low RESET) output deasserts allowing the micro controller (µC) to operate. If any voltage falls below its threshold, the reset output asserts and all voltage supplies are turned off. The MAX16050/MAX16051 can be daisy-chained to control a higher number of voltages in a system.

During a power-down event, the MAX16050/MAX16051 can reverse sequence the outputs. In this situation, each voltage is turned off sequentially until it reaches a 250mV level, at which point, the next supply is turned off. The MAX16050/MAX16051 also provide internal pulldown circuitry that turns on during power-down, to help discharge large output capacitors.

The MAX16050/MAX16051 feature a charge-pump supply output that can be used as a pullup voltage for driving external n-channel MOSFETs and an overvoltage output that indicates when any of the monitored voltages exceeds its overvoltage threshold. The MAX16050 also provides three sequence control inputs for changing the sequence order, while the MAX16051 has a fixed sequence order.

The MAX16050/MAX16051 are available in a 28-pin (4mm x 4mm) thin QFN package and are fully specified over the -40°C to +85°C extended operating temperature range.

Applications

  • Networking Systems
  • Servers
  • Storage Systems
  • Telecom Equipment
  • Workstations
Part Models 2
1ku List Price Starting From $6.10

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Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX16051ETI+
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Product Lifecycle

PCN

Jun 20, 2016

- 1612

ASSEMBLY

MAX16051ETI+

PRODUCTION

MAX16051ETI+T

PRODUCTION

Feb 8, 2016

- 1609

ELECTRICAL DATASHEET

MAX16051ETI+

PRODUCTION

MAX16051ETI+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Jun 20, 2016

- 1612

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ASSEMBLY

MAX16051ETI+

PRODUCTION

MAX16051ETI+T

PRODUCTION

Feb 8, 2016

- 1609

arrow down

ELECTRICAL DATASHEET

MAX16051ETI+

PRODUCTION

MAX16051ETI+T

PRODUCTION

Software & Part Ecosystem

Evaluation Kits 1

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MAX16050EVKIT

Evaluation Kit for the MAX16050

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MAX16050EVKIT

Evaluation Kit for the MAX16050

Evaluation Kit for the MAX16050

Features and Benefits

  • Quick Demo Mode Evaluation Without DC-DC Converters
  • Monitors and Sequences Up to Nine DC-DC Converter Outputs
  • Reverse-Sequencing Operation
  • Configurable Sequencing Order (MAX16050 Only)
  • Daisy-Chaining Operation of the MAX16050 and MAX16051
  • Overvoltage and Power-Good Monitoring
  • Fully Assembled and Tested

Product Detail

The MAX16050 evaluation kit (EV kit) is a complete, fully assembled and tested multivoltage sequencer circuit that demonstrates the capability of the 4-channel MAX16050 and 5-channel MAX16051 sequencing ICs. The MAX16050 EV kit monitors up to nine DC-DC converter outputs and ensures proper power-up and power-down conditions for systems requiring voltage sequencing.

The EV kit features active-low RESET output signals to indicate an undervoltage condition, or when active-low SHDN or active-low FAULT signals are pulled low. Additionally, dedicated active-low OV_OUT outputs indicate an overvoltage fault when any of the EV kit's inputs go above the overvoltage threshold. The EV kit is capable of evaluating the MAX16050 and MAX16051 individually. The EV kit can be configured for daisy chaining these two devices together, which enables the user to sequence and monitor up to nine voltages across both devices. The MAX16050 EV kit also provides PCB pads for low-current MOSFETs that are controlled using the MAX16050 and MAX16051 charge-pump outputs.

The MAX16050 EV kit utilizes two power supplies, one for each IC. Each power supply can range from 2.7V to 13.2V, allowing the user to operate directly from an intermediate bus voltage. The MAX16050 EV kit also requires an additional 2.2V to 5.5V power supply for the pullup resistors' open-drain logic outputs.

Applications

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

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