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MAX5927, MAX5929
Low-Voltage, Quad, Hot-Swap Controllers/Power Sequencers

Triple/Quad Hot-Swap Controllers Enable Sequencing, Tracking, or Independent On/Off Control for Low-Voltage Supplies


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 992kB)
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Description
The MAX5927/MAX5929 +1V to +13.2V quad hot-swap controllers provide complete protection for multisupply systems. They allow the safe insertion and removal of circuit cards into live backplanes. These devices hot swap multiple supplies ranging from +1V to +13.2V, provided one supply is at or above +2.7V and only one supply is above +11.0V. The input voltage rails (channels) can be configured to sequentially turn-on/off, track each other, or have completely independent operation.

The discharged filter capacitors of the circuit card provide low impedance to the live backplane. High inrush currents from the backplane to the circuit card can burn up connectors and components, or momentarily collapse the backplane power supply leading to a system reset. The MAX5927/MAX5929 hot-swap controllers prevent such problems by gradually ramping up the output voltage and regulating the current to a preset limit when the board is plugged in, allowing the system to stabilize safely. After the startup cycle is complete, on-chip comparators provide VariableSpeed/BiLevel™ protection against short-circuit and overcurrent faults, and provide immunity against system noise and load transients. The load is disconnected in the event of a fault condition. The MAX5929A automatically restarts after a fault condition, while the MAX5929L must be unlatched. The MAX5927 fault management mode is selectable.

The MAX5927/MAX5929 offer a variety of options to reduce external component count and design time. All devices integrate an on-board charge pump to drive the gates of low-cost external N-channel MOSFETs, an adjustable startup timer, and an adjustable current limit. The devices offer integrated features like startup current regulation and current glitch protection to eliminate external timing resistors and capacitors. The MAX5929_L provides an open-drain active-low status output for each channel, the MAX5929_H provides an open-drain active-high status output for each channel, and the MAX5927 status output polarity is selectable.

The MAX5927 is available in a 32-pin thin QFN package and the MAX5929 is available in a 24-pin QSOP package. All devices are specified over the extended temperature range, -40°C to +85°C.

An evaluation kit is available:  MAX5927EVKIT  

Key Features   Applications/Uses
  • Safe Hot Swap for +1V to +13.2V Power Supplies with Any Input Voltage (VIN_ > 2.7V and Only One VIN_ > 11.0V)
  • Adjustable Circuit Breaker/Current-Limit Threshold from 25mV to 100mV
  • Configurable Tracking, Sequencing, or Independent Operation Modes
  • VariableSpeed/BiLevel Circuit-Breaker Response
  • Internal Charge Pumps Generate N-Channel MOSFET Gate Drives
  • Inrush Current Regulated at Startup
  • Autoretry or Latched Fault Management
  • Programmable Undervoltage Lockout
  • Status Outputs Indicate Fault/Safe Condition
 
  • Base-Station Line Cards
  • Bays (Docking Stations)
  • Hot Plug-In Daughter Cards
  • Hubs
  • Network Routers and Switches
  • PCI Express® Hot Plug
  • Portable Computer Device
  • Power-Supply
  • RAID
  • Sequencing/Tracking

Key Specifications:  Hot Swap Controllers
Part Number VIN
(V)
VIN
(V)
Low Volt. High Volt. Voltage Polarity Type Fault Condition Control Channels Package/Pins Price
min max See Notes
MAX5927  1 13.2 Yes No Positive Positive, Low-Voltage Programmable Latched Off or Periodic Retry 4
TQFN/32
-
MAX5929 
Latched Off
Periodic Retry
QSOP/24
-
See All Hot Swap Controllers (47)

Diagram
MAX5927, MAX5929: Typical Operating Circuit
Typical Operating Circuit

Application Notes
  • Application Note 4228: A Five-Channel (Three +V and Two -V) Hot-Swap Reference Design - MAX5927
  • Evaluation Kits
  • MAX5927EVKIT
  • Reliability Reports
  • Show FIT data for:
  • Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * 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.


    Devices: 1-10 of 10

    MAX5927 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5927ETJ    
    Active TQFN;32 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0012 (PDF)
    Use pkgcode/variation: T3255-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5927ETJ-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX5927ETJ+  
    Active TQFN;32 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0012 (PDF)
    Use pkgcode/variation: T3255+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5927ETJ+T    
    Active TQFN;32 pin;26 mm²
    Outline Drawing: 21-0140 (PDF)
    Land Pattern: 90-0012 (PDF)
    Use pkgcode/variation: T3255+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5929 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX5929LHEEG+  
    Active QSOP;24 pin;54.2 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0172 (PDF)
    Use pkgcode/variation: E24+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5929LHEEG+T    
    Active QSOP;24 pin;54.2 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0172 (PDF)
    Use pkgcode/variation: E24+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX5929LHEEG    
    Active QSOP;24 pin;54.2 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0172 (PDF)
    Use pkgcode/variation: E24-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5929LHEEG-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet
    MAX5929LLEEG    
    Active QSOP;24 pin;54.2 mm²
    Outline Drawing: 21-0055 (PDF)
    Land Pattern: 90-0172 (PDF)
    Use pkgcode/variation: E24-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX5929LLEEG-T    
    Active

    Land Pattern: Not Available

    -40°C to +85°C See data sheet

    More Information
  • New Product Press Release 2003-10-28 

    Related Products
    MAX5904, MAX5905, MAX5906, MAX5907, MAX5908, MAX5909 Low-Voltage, Dual Hot-Swap Controllers/Power Sequencers

    More Like This: View Product Families for Similar Products

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    Document Ref.: 19-2945; Rev 3; 2004-04-01
    This page last modified: 2009-10-08


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