MAX5933A Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Positive High-Voltage, Hot-Swap Controllers

19-3263; Rev 1; 7/04
Positive High-Voltage, Hot-Swap Controllers
General Description
The MAX5933A–MAX5933F/MAX5947A/B/C fully integrat-
ed hot-swap controllers for +9V to +80V positive supply
rails (MAX5947A/B/C), allow for the safe insertion and
removal of circuit cards into live backplanes without caus-
ing glitches on the backplane power-supply rail. The
MAX5947B is pin- and function-compatible with the
LT1641-2. The other devices offer added features such
as a choice of active-high or active-low power-good out-
puts (PWRGD/PWRGD), latched/autoretry fault manage-
ment, and autoretry duty-cycle options of 3.75% or 0.94%
(see the Selector Guide).
The MAX5933A–MAX5933F are available with a default
undervoltage lockout threshold of +31V and operate over
a supply voltage range of +33V to +80V. The
MAX5947A/B/C are available with a default undervoltage
of +8.3V. All devices feature a programmable analog
foldback current limit. If the device remains in current limit
for more than a programmable time, the external
n-channel MOSFET is either latched off (MAX5933A/
MAX5933C/MAX5947A) or is set to automatically restart
after a timeout delay (MAX5933B/MAX5933D/MAX5933E/
MAX5933F/MAX5947B/MAX5947C).
The MAX5933_ and MAX5947_ operate in the extended
temperature range of -40°C to +85°C. These devices are
available in an 8-pin SO package.
Applications
Hot Board Insertion
Electronic Circuit Breakers
Industrial High-Side Switch/Circuit Breakers
Network Routers and Switches
24V/48V Industrial/Alarm Systems
Features
♦ Pin- and Function-Compatible with the LT1641-2
(MAX5947B)
♦ Provides Safe Hot Swap for +9V to +80V Power-
Supply Range (MAX5947A/B/C)
♦ Safe Board Insertion and Removal from Live
Backplanes
♦ Latched/Autoretry Management
♦ Active-Low or Active-High Power-Good Output
♦ Programmable Foldback Current Limiting
♦ High-Side Drive for an External N-Channel MOSFET
♦ Built-In Thermal Shutdown
♦ Undervoltage Lockout (UVLO)
♦ Overvoltage Protection
♦ User-Programmable Supply Voltage
Power-Up Rate
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX5933_ESA*
-40°C to +85°C 8 SO
MAX5947_ESA*
-40°C to +85°C 8 SO
*Insert the desired suffix from the Selector Guide into the blank
to complete the part number.
Typical Application Circuit and Pin Configuration appear at
end of data sheet.
Selector Guide
PART
MAX5933A
MAX5933B
MAX5933C
MAX5933D
MAX5933E
MAX5933F
MAX5947A
MAX5947B
MAX5947C
LATCHED
FAULT
PROTECTION
Yes
—
Yes
—
—
—
Yes
—
—
AUTORETRY
FAULT
PROTECTION
—
Yes
—
Yes
Yes
Yes
—
Yes
Yes
PWRGD
OUTPUT LOGIC
High
High
Low
Low
High
Low
Low
High
Low
DUTY CYCLE
(%)
—
3.75
—
3.75
0.94
0.94
—
3.75
3.75
DEFAULT UVLO
(V)
31
31
31
31
31
31
8.3
8.3
8.3
SUPPLY
VOLTAGE
RANGE (V)
33 to 80
33 to 80
33 to 80
33 to 80
33 to 80
33 to 80
9 to 80
9 to 80
9 to 80
________________________________________________________________ Maxim Integrated Products 1
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