MAX16050ETI データシートの表示（PDF） - Maxim Integrated

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MAX16050ETI

Voltage Monitors/Sequencer Circuits with Reverse-Sequencing Capability

Maxim Integrated 

MAX16050/MAX16051

EVALUATION KIT AVAILABLE

Voltage Monitors/Sequencer Circuits with

Reverse-Sequencing Capability

General Description

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 (RESET) output deasserts allowing the

microcontroller (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

●● Servers

●● Workstations

●● Networking Systems

●● Telecom Equipment

●● Storage Systems

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

Ordering Information and Typical Operating Circuit appears

at end of data sheet.

19-1013; Rev 2; 5/17

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