MAX5963 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Dual, 7.5V to 76V, Hot-Swap and Diode ORing Controller

19-4344; Rev 0; 10/08
EVAALVUAAILTAIOBNLEKIT
Dual, 7.5V to 76V, Hot-Swap and
Diode ORing Controller
General Description
The MAX5963 dual hot-swap and diode ORing con-
troller provides complete protection for dual-supply high
availability systems. The device operates from 7.5V to
76V and provides hot-swap and low voltage-drop diode
ORing functionality for two 7.5V to 76V outputs.
The MAX5963 allows for the safe insertion and removal
of system line cards and FireWire^® peripherals into a
live backplane by providing inrush current control and
active current limiting. The device controls external
n-channel power MOSFETs to perform low-voltage-drop
ORing, inrush current control, and current limiting func-
tions. The current-limit function actively limits the cur-
rent drawn by the load, protecting the load from a
short-circuit condition. The MAX5963 also features a
circuit-breaker function that disconnects the power to
the load if the load current exceeds the circuit-breaker
limit for a programmable circuit-breaker timeout.
The MAX5963 features an autoretry/latchoff input. In
autoretry mode, the MAX5963 automatically restarts the
turned-off channel after a programmable delay. In
latchoff mode, the MAX5963 latches the channel off.
The MAX5963 consumes less than 10µA from the PWR
supply in system power-off mode.
The MAX5963 is available in a 40-pin TQFN package
(6mm x 6mm) and operates over the 0°C to +85°C
upper commercial temperature range.
Applications
Blade Servers
Base-Station Line Cards
Network Switches/Routers
FireWire Desktops/Notebook Ports
FireWire Hubs
Typical Operating Circuit appears at end of data sheet.
Features
o Hot Swaps Two 7.5V to 76V Supplies
o Integrates Low-Voltage-Drop ORing Controller
o ±5% Accuracy Bilevel Active Current Limit/Circuit
Breaker
o Programmable Current-Limit/Circuit-Breaker
Timeout
o 10µA Power-Off Mode Current
o Protects Up to Two FireWire Ports
o System Power-On/Off ORing
o Latchoff or Autoretry Power Management
o Independent ON/OFF Control Allows
Undervoltage Lockout Programming
o Fast Load Disconnect through FOSO Input
(FireWire Port)
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5963UTL+
0°C to +85°C
40 TQFN-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
30 29 28 27 26 25 24 23 22 21
TCL 31
20 SENSEB
TCB 32
19 OR
ONB 33
18 CL
ONA 34
17 CB
FOSO 35
ENZ 36
MAX5963
16 N.C.
15 PS
ENY 37
14 N.C.
ENX 38
+
N.C. 39
*EP
13 BP
12 SENSEA
N.C. 40
11 N.C.
1 2 3 4 5 6 7 8 9 10
FireWire is a registered trademark of Apple, Inc.
THIN QFN
(6mm x 6mm)
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.