MAX6819UT+T by Analog Devices

SOT23 Power-Supply Sequencers


The MAX6819/MAX6820 are power-supply sequencers for dual-voltage microprocessors (µPs) and multivoltage systems. These devices monitor a primary supply voltage and enable/disable an external N-channel MOSFET switch for a secondary supply voltage. The MAX6819/MAX6820 control local component voltage sequencing when system power-on/power-off characteristics cannot be guaranteed (supplies come from a multivoltage system bus, silver box, or must be sequenced in different modes for components on the same board). These small power-supply sequencers improve system reliability. The MAX6819/MAX6820 include an internal voltage reference/comparator with externally adjustable thresholds to monitor the primary power supply. When the primary supply is below the desired threshold, an external secondary supply MOSFET switch is disabled. When the primary supply exceeds the threshold, an internal charge pump is activated and the external MOSFET switch is enabled to connect the secondary supply to the load. The charge pump fully enhances the N-channel MOSFET switch to provide a very low RDS-ON voltage drop. The devices can be connected to support various supply sequencing priorities such as VI/O before VCORE or VCORE before VI/O. The MAX6819 features a logic-driven EN input to enable/disable the external MOSFET drive and includes an internally fixed 200ms enable timeout period (VPRIMARY GOOD to VSECONDARY ENABLE). The MAX6820 allows the enable timeout period to be adjusted with a single external capacitor. Both devices are specified over the automotive temperature range (-40°C to +125°C) and are available in space-saving 6-pin SOT23 packages.

Where to Buy

Prices starting from US$3.17

Distributor Stock
Logo for Farnell
Farnell
from US$3.17
2,157
in stock
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Logo for Newark Electronics
Newark Electronics
from US$3.53
2,157
in stock
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Logo for element14
element14
from US$3.65
2,157
in stock
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Features

Adjustable Primary Supply Voltage Monitor (Monitors Down to 0.62V)
Internal Charge Pump to Enhance External Secondary Supply N-Channel MOSFET Switch
Delay from Primary Supply Good to Secondary Supply Enabled Factory Fixed 200ms (MAX6819) Capacitor Adjustable (MAX6820)
Factory Fixed 200ms (MAX6819)
Capacitor Adjustable (MAX6820)
Logic Driven ENABLE Input (MAX6819)
Immune to Short Voltage Transients
Few External Components
-40°C to +125°C Operating Temperature Range
Small 6-Pin SOT23 Package

Specifications

# Input Channels 2
Interface Factory FixedR/C Adjustable
Option Sequence
VIN (V) (max) <6
Oper. Temp. (°C) -40 to +85-40 to +1250 to +70
Package/Pins SOT23/6
BudgetaryPrice (See Notes) 2.88


MAX6819UT+T Power Management ICs - PMIC by Analog Devices

MPU SUPERVISOR 5.5V SOT-23-6

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Threshold Voltage 618mV
No. of Supervisors / Monitors 1Monitors
Supply Voltage Min 900mV
Supply Voltage Max 5.5V
Reset Type -
Digital IC Case SOT-23
No. of Pins 6Pins
Delay Time 200ms
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Mpu Supervisor, 5.5V, Sot-23-6 | Newark Electronics
MPU SUPERVISOR, 5.5V, SOT-23-6 | element14

Frequently Asked Questions

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Is the MAX6819UT+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX6819UT+T .

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