MAX5934 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Positive High-Voltage, Hot-Swap Controllers with Selectable Fault Management and Status Polarity

19-3282; Rev 1; 7/04
Positive High-Voltage, Hot-Swap Controllers with
Selectable Fault Management and Status Polarity
General Description
The MAX5934/MAX5934A are fully integrated hot-swap
controllers for +9V to +80V (MAX5934A) positive supply
rails. The MAX5934 is optimized for +33V to +80V
power-supply rails. These devices allow for the safe
insertion and removal of circuit cards into a live back-
plane without causing glitches on the backplane
power-supply rail. The MAX5934/MAX5934A feature a
programmable analog foldback current limit, program-
mable undervoltage lockout, and programmable out-
put-voltage slew rate through an external n-channel
MOSFET. In addition, if these devices remain in current
limit for more than a programmable time, the external
n-channel MOSFET latches off.
The MAX5934/MAX5934A feature pin-selectable
PWRGD_ assertion polarity (active low or active high)
and pin-selectable fault management (latched or
autoretry). Other features include automatic restart after
a circuit-breaker fault, selectable duty-cycle (DC)
options, and thermal-shutdown mode for overtempera-
ture protection.
The MAX5934/MAX5934A operate in the extended
(-40°C to +85°C) temperature range and are available
in a 16-pin QSOP package.
Applications
Hot Board Insertion
Electronic Circuit Breakers
Industrial High-Side Switch/Circuit Breakers
Network Routers and Switches
24V/48V Industrial/Alarm Systems
Typical Application Circuit appears at end of data sheet.
Features
♦ Provides Safe Hot Swap for +9V to +80V Power
Supplies (MAX5934A)
♦ Safe Board Insertion and Removal from a Live
Backplane
♦ Pin-Selectable Active-Low or Active-High Power-
Good Output
♦ Pin-Selectable Latched or Autoretry Fault
Management
♦ Programmable Foldback Current Limiting
♦ High-Side Drive for an External N-Channel MOSFET
♦ Built-In Thermal Shutdown
♦ Undervoltage Lockout (UVLO)
♦ Pin-Selectable Duty-Cycle Options (0.94%, 1.88%,
3.75%)
Ordering Information
PART
MAX5934EEE
MAX5934AEEE
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
16 QSOP
Pin Configuration
TOP VIEW
LATCH/RETRY ₁
ON 2
POL_SEL 3
FB1 4
PWRGD2 5
PWRGD1 6
PWRGD3 7
GND 8
MAX5934
MAX5934A
QSOP
16 V_CC
15 DC
14 SENSE
13 N.C.
12 FB2
11 GATE
10 TIMER
9 OUT
Selector Guide
PART
MAX5934
MAX5934A
DEFAULT UVLO
(V)
31
8.3
SUPPLY VOLTAGE
RANGE (V)
+33 to +80
+9 to +80
LATCHED/
AUTORETRY FAULT
PROTECTION
Pin-selectable
Pin-selectable
DUTY CYCLE
Pin-selectable
Pin-selectable
PWRGD_
OUTPUT LOGIC
Pin-selectable
Pin-selectable
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.