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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.
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.
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Data Sheet
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An evaluation kit is available: MAX5927EVKIT
Key Features
- 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
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Applications/Uses
- 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
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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 |
| MAX5927 |
1 |
13.2 |
Current Limit |
25 |
Programmable |
4 |
Positive |
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- |
| MAX5929 |
| Latched Off | | Periodic Retry |
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- |
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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
Typical Operating Circuit
Application Notes
Reliability Reports
| Show FIT data for: |
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| Request Reliability Report for: |
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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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| MAX5927ETJ
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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: No
Materials Analysis |
| MAX5927ETJ+
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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 |
| MAX5927ETJ+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 |
| MAX5927ETJ-T
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Active |
QFN;32 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX5929LHEEG
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Active |
QSOP;24 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5929LHEEG+
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Active |
QSOP;24 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5929LHEEG+T
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Active |
QSOP;24 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX5929LHEEG-T
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Active |
QSOP;24 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX5929LLEEG
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Active |
QSOP;24 pin;54.2 mm²
Outline Drawing:21-0055 (PDF)
Land Pattern: 90-0172 (PDF)
Use pkgcode/variation: E24-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX5929LLEEG-T
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Active |
QSOP;24 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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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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Information Index
Document Ref.: 19-2945
Rev 3;
2004-04-01
This page last modified: 2009-10-08
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