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MAX5978
0 to 16V, Hot-Swap Controller with 10-Bit Current, Voltage Monitor, and 4 LED Drivers
Industry's First Hot-Swap Controller Operates Down to 0V and Integrates a Voltage and Current Monitor
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Status
Active: In Production.
Description
The MAX5978 hot-swap controller provides complete protection for systems with a supply voltage from 0 to 16V. The device includes four programmable LED outputs.
The IC provides two programmable levels of overcurrent circuit-breaker protection: a fast-trip threshold for a fast turn-off, and a lower slow-trip threshold for a delayed turn-off. The maximum overcurrent circuit-breaker threshold range is set with a trilevel logic input (IRNG), or by programming through the I²C interface.
The IC is an advanced hot-swap controller that monitors voltage and current with an internal 10-bit ADC, which is continuously multiplexed to convert the output voltage and current at 10ksps. Each 10-bit sample is stored in an internal circular buffer so that 50 past samples of each signal can be read back through the I²C interface at any time or after a fault condition.
The device includes five user-programmable digital comparators to implement overcurrent warning and two levels of overvoltage/undervoltage detection. When measured values violate the programmable limits, an external active-low ALERT output is asserted. In addition to the active-low ALERT signal, the IC can be programmed to deassert the power-good signal and/or turn off the external MOSFET.
The IC features four I/Os that can be independently configured as general-purpose input/outputs (GPIOs) or as open-drain LED drivers with programmable blinking. These four I/Os can be configured for any mix of LED driver or GPIO function.
The device is available in a 32-pin thin QFN-EP package and operates over the -40°C to +85°C extended temperature range.
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Data Sheet
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Key Features
- Hot-Swap Controller Operates from 0 to 16V
- 10-Bit ADC Monitors Load Voltage and Current
- Circular Buffers Store 5ms of Current and Voltage Measurements
- Internal Charge Pump Generates n-Channel MOSFET Gate Drive
- Internal 500mA Gate Pulldown Current for Fast Shutdown
- VariableSpeed/Bilevel™ Circuit-Breaker Protection
- Precision-Voltage Enable Input
- Alert Output Indicates Fault and Warning Conditions
- Open-Drain Power-Good Output with Programmable Polarity
- Open-Drain Fault Output
- Four Open-Drain General-Purpose Outputs Sink 25mA to Directly Drive LEDs
- Programmable LED Flashing Function
- Latched-Off Fault Management
- 400kHz I²C Interface
- Small, 5mm x 5mm, 32-Pin TQFN-EP Package
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Applications/Uses
- Blade Servers
- DC Power Metering
- Disk Drives/DASD/Storage Systems
- Network Switches/Routers
- Soft-Switch for ASICs, FPGAs, and Microcontrollers
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Key Specifications:
| Hot Swap Controllers |
| Part Number |
VIN
(V) |
VIN
(V) |
Circuit Breaker/ Current Limit |
Circuit Breaker/Current Limit Threshold
(mV) |
Fault Condition Control |
Channels |
Positive/Negative Rail |
Package/Pins |
Budgetary Price |
| min |
max |
See Notes |
| MAX5978 |
2.7 |
16 |
Circuit Breaker |
Adjustable |
Programmable |
1 |
Positive |
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$4.60 @1k |
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See All Hot Swap Controllers (53)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Functional Diagram
Application Notes
Product Guides
Reliability Reports
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX5978ETJ+
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5978ETJ+T
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Document Ref.: 19-5328
Rev 0;
2010-07-21
This page last modified: 2010-07-23
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