MAX16070 datasheet(11/52 Pages) MAXIM

部件名	MAX16070

功能描述	12-Channel/8-Channel, Flash-Configurable System Monitors with Nonvolatile Fault Registers

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制造商	MAXIM [Maxim Integrated Products]

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12-Channel/8-Channel, Flash-Configurable System

Managers with Nonvolatile Fault Registers

______________________________________________________________________________________ 11

Detailed Description

The MAX16070 monitors up to twelve system power sup-

plies and the MAX16071 can monitor up to eight system

power supplies. After boot-up, if EN is high and the soft-

ware enable bit is set to ‘1,’ monitoring begins based on

the configuration stored in flash. An internal multiplexer

cycles through each MON_ input. At each multiplexer

stop, the 10-bit ADC converts the monitored analog volt-

age to a digital result and stores the result in a register.

Each time a conversion cycle (50Fs, max) completes,

internal logic circuitry compares the conversion results

to the overvoltage and undervoltage thresholds stored in

memory. When a result violates a programmed threshold,

the conversion can be configured to generate a fault.

GPIO_ can be programmed to assert on combinations

of faults. Additionally, faults can be configured to shut off

the system and trigger the nonvolatile fault logger, which

writes all fault information automatically to the flash and

write-protects the data to prevent accidental erasure.

The MAX16070/MAX16071 contain both SMBus and

JTAG serial interfaces for accessing registers and flash.

Use only one interface at any given time. For more infor-

mation on how to access the internal memory through

these interfaces, see the SMBus-Compatible Interface

and JTAG Serial Interface sections. The memory map

is divided into three pages with access controlled by

special SMBus and JTAG commands.

The factory-default values at POR (power-on reset) for all

RAM registers are ‘0’s. POR occurs when VCC reaches

the undervoltage-lockout threshold (UVLO) of 2.8V (max).

At POR, the device begins a boot-up sequence. During

the boot-up sequence, all monitored inputs are masked

from initiating faults and flash contents are copied to

the respective register locations. During boot-up, the

MAX16070/MAX16071 are not accessible through the

serial interface. The boot-up sequence takes up to

150Fs, after which the device is ready for normal opera-

tion. RESET is asserted low up to the boot-up phase and

remains asserted for its programmed timeout period once

sequencing is completed and all monitored channels

are within their respective thresholds. Up to the boot-up

phase, the GPIO_s are high impedance.

Power

Apply 2.8V to 14V to VCC to power the MAX16070/

MAX16071. Bypass VCC to ground with a 10FF capaci-

tor. Two internal voltage regulators, ABP and DBP,

supply power to the analog and digital circuitry within

the device. For operation at 3.6V or lower, disable the

regulators by connecting ABP and DBP to VCC.

ABP is a 3.0V (typ) voltage regulator that powers the inter-

nal analog circuitry. Bypass ABP to GND with a 1FF ceram-

ic capacitor installed as close to the device as possible.

DBP is an internal 3.0V (typ) voltage regulator. DBP pow-

ers flash and digital circuitry. All push-pull outputs refer to

DBP. Bypass the DBP output to GND with a 1FF ceramic

capacitor installed as close as possible to the device.

Do not power external circuitry from ABP or DBP.

Enable

To enable monitoring, the voltage at EN must be above

1.4V and the software enable bit in r73h[0] must be set

to ‘1.’ To power down and disable monitoring, either pull

EN below 1.35V or set the Software Enable bit to ‘0.’

See Table 1 for the software enable bit configurations.

Connect EN to ABP if not used.

Table 1. Software Enable Configurations

REGISTER

ADDRESS

FLASH

ADDRESS

BIT RANGE

DESCRIPTION

73h

273h

[0]

Software enable

[1]

Reserved

[2]

1 = Margin mode enabled

[3]

Early warning threshold select

0 = Early warning is undervoltage

1 = Early warning is overvoltage

[4]

Independent watchdog mode enable

1 = Watchdog timer is independent of sequencer

0 = Watchdog timer boots after sequence completes

类似零件编号 - MAX16070

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类似说明 - MAX16070

制造商	部件名	数据表	功能描述
Maxim Integrated Produc...	MAX16065	2Mb / 61P	12-Channel/8-Channel, Flash-Configurable System Managers with Nonvolatile Fault Registers Rev 0; 7/09
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	MAX16068	1Mb / 40P	6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers Rev 0; 10/09
	MAX16046	481Kb / 70P	12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers Rev 4; 3/09
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	MAX16047	516Kb / 62P	12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers Rev 0; 11/07
	MAX16046	545Kb / 68P	12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers Rev 0; 10/07
	MAX16047A	1,015Kb / 61P	12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers Rev 0; 4/10
	MAX16046A	1Mb / 71P	12-Channel/8-Channel EEPROM-Programmable System Managers with Nonvolatile Fault Registers Rev 0; 4/10

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