ADM1177-1ARMZ-R7 Low Voltage Hot Swap Controllers by Analog Devices

Status: Production
Series: ADM1177
RoHS: Compliant
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The ADM1177 is an integrated hot swap controller that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface.An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.The ADM1177 limits the current through this resistor by control-ling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage (and, therefore, the inrush current) is kept below a preset maximum.The ADM1177 protects the external FET by limiting the time that it spends with maximum current running through it. This current limit period is set by the choice of capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events that may occur once the hot swap event is complete. In the case of a short-circuit event, the current in the sense resistor exceeds an overcurrent trip threshold, and the FET is switched off immediately by pulling down the GATE pin.A soft start (SS) pin is also included. This gives the user control over the reference on the current sense amplifier. An internal current source charges a capacitor on this pin at startup, allowing the user to set the profile of the initial current ramp. A voltage can also be driven on this pin to alter the reference.A 12-bit ADC can measure the current seen in the sense resistor, as well as the supply voltage on the VCC pin. An industry-standard I2C interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by an I2C command. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to four unique I2C addresses can be created, depending on the way the ADR pin is connected.The ADM1177 is packaged in a 10-lead MSOP.

Where to Buy

Prices starting from US$3.34

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Newark Electronics
from US$4.35
1,420
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element14
from US$4.40
1,420
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Farnell
from US$4.13
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Analog Devices
from US$4.19
508
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Chip One Stop
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Features

Allows safe board insertion and removal from a live backplane 
Controls supply voltages from 3.15 V to 16.5 V 
Precision current sense amplifier 
Precision voltage input 
12-bit ADC for current and voltage readback 
Charge pumped gate drive for external N-channel FET 
Active high ON pin
10-lead MSOP
Adjustable analog current limit with circuit breaker 
±3% accurate hot swap current limit level 
Fast response limits peak fault current 
Automatic retry or latch-off on current fault 
Programmable hot swap timing via TIMER pin 
Soft start pin for reference adjustment and programming of initial current ramp rate 
I2C fast mode-compliant interface (400 kHz maximum)

Alternative Descriptions

Hot-Swap Ctrl, -40 To 85Deg C, Msop-10 | Newark Electronics
HOT-SWAP CTRL, -40 TO 85DEG C, MSOP-10 | element14
ON Pin + Auto-Retry IC. | Analog Devices


Frequently Asked Questions

Where can I find additional details, specifications and documents for a ADM1177-1ARMZ-R7?

Additional datasheets, footprints and schematics for ADM1177-1ARMZ-R7 are listed on our Part Details page. You can also find images and similar parts to ADM1177-1ARMZ-R7 on this page.

What pricing and inventory information can I view?

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What category does ADM1177-1ARMZ-R7 fall under?

The ADM1177-1ARMZ-R7 is listed under Low Voltage Hot Swap Controllers.

Can I view similar or alternative parts?

You can view similar parts to ADM1177-1ARMZ-R7 when available in the Low Voltage Hot Swap Controllers range under the specifications section at the bottom of the details page.

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Is the ADM1177-1ARMZ-R7 RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for ADM1177-1ARMZ-R7 have stock available?

Authorised distributors including Newark Electronics, element14, Farnell, Analog Devices and Chip One Stop have stock available or on a lead time for ADM1177-1ARMZ-R7.

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