MAX5925BEUB+ Maxim Integrated Products, MAX5925BEUB+ Datasheet

IC HOT-SWAP CTRLR N-CH 10-UMAX

MAX5925BEUB+

Manufacturer Part Number
MAX5925BEUB+
Description
IC HOT-SWAP CTRLR N-CH 10-UMAX
Manufacturer
Maxim Integrated Products
Type
Hot-Swap Controllerr
Datasheet
1.MAX5925AEUB.pdf (21 pages)

Specifications of MAX5925BEUB+

Applications
General Purpose
Internal Switch(s)
No
Voltage - Supply
1 V ~ 13.2 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX5924/MAX5925/MAX5926 1V to 13.2V hot-swap
controllers allow the safe insertion and removal of circuit
cards into live backplanes. These devices hot swap sup-
plies ranging from 1V to 13.2V provided that the device
supply voltage, V
swapped supply, V
The MAX5924/MAX5925/MAX5926 hot-swap controllers
limit the inrush current to the load and provide a circuit-
breaker function for overcurrent protection. The devices
operate with or without a sense resistor. When operat-
ing without a sense resistor, load-probing circuitry
ensures a short circuit is not present during startup,
then gradually turns on the external MOSFET. After the
load probing is complete, on-chip comparators provide
overcurrent protection by monitoring the voltage drop
across the external MOSFET on-resistance. In the event
of a fault condition, the load is disconnected.
The MAX5924/MAX5925/MAX5926 include many inte-
grated features that reduce component count and
design time, including configurable turn-on voltage,
slew rate, and circuit-breaker threshold. An on-board
charge pump provides the gate drive for a low-cost,
external n-channel MOSFET.
The MAX5924/MAX5925/MAX5926 are available with
open-drain PGOOD and/or PGOOD outputs. The
MAX5925/MAX5926 also feature a circuit breaker with
temperature-compensated R
MAX5926 features a selectable 0ppm/°C or 3300ppm/°C
temperature coefficient. The MAX5924 temperature coef-
ficient is 0ppm/°C and the MAX5925 temperature coeffi-
cient is 3300ppm/°C. Autoretry and latched fault-
management configurations are available (see the
Selector Guide ).
19-3443; Rev 3; 4/10
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Selector Guide appears at end of data sheet.
Pin Configurations appear at end of data sheet.
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.
Base Stations
RAID
Remote-Access Servers
Network Routers and Switches
Servers
Portable Device Bays
1V to 13.2V, n-Channel Hot-Swap Controllers
CC
________________________________________________________________ Maxim Integrated Products
S
, does not exceed V
, is at or above 2.25V and the hot-
General Description
DS(ON)
Applications
CC
sensing. The
.
Require No Sense Resistor
o Hot Swap 1V to 13.2V with V
o Drive High-Side n-Channel MOSFET
o Operation With or Without R
o Temperature-Compensated R
o Protected During Turn-On into Shorted Load
o Adjustable Circuit-Breaker Threshold
o Programmable Slew-Rate Control
o Programmable Turn-On Voltage
o Autoretry or Latched Fault Management
o 10-Pin µMAX
* Future product—contact factory for availability.
** EP = Exposed pad.
MAX5924AEUB
MAX5924BEUB
MAX5924CEUB*
MAX5924DEUB*
MAX5925AEUB
MAX5925BEUB*
MAX5925CEUB*
MAX5925DEUB*
MAX5926EEE
Typical Operating Circuits continued at end of data sheet.
GND
V
V
CC
SEE FIGURE 1 FOR A DETAILED TYPICAL OPERATING CIRCUIT WITHOUT R SENSE .
S
BACKPLANE
PART
Typical Operating Circuits
®
REMOVABLE CARD
TYPICAL OPERATION WITHOUT R
or 16-Pin QSOP Packages
1V TO V
2.25V TO 13.2V
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Ordering Information
CC
R
CB
V
GND
CC
CB
CC
SENSE
MAX5925
MAX5926
GATE
DS(ON)
N
≥ 2.25V
SENSE
SENSE
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10 µMAX
16 QSOP–EP**
PIN-PACKAGE
Sensing
SC_DET
Features
OUT
R
SC
V
OUT
1

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MAX5925BEUB+ Summary of contents

Page 1

... Remote-Access Servers Network Routers and Switches Servers Portable Device Bays µMAX is a registered trademark of Maxim Integrated Products, Inc. Selector Guide appears at end of data sheet. Pin Configurations appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...

Page 2

Hot-Swap Controllers Require No Sense Resistor ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) V .........................................................................-0.3V to +14V CC GATE*.....................................................................-0.3V to +20V All Other Pins ............-0.3V to the lower of (V SC_DET Current ...

Page 3

Hot-Swap Controllers ELECTRICAL CHARACTERISTICS (continued (MAX5924/MAX5925), EN1 (MAX5926) = +2.7V to +13.2V; EN2 (MAX5926 -40°C to +85°C, unless otherwise noted. Typical values are open, ...

Page 4

Hot-Swap Controllers Require No Sense Resistor ELECTRICAL CHARACTERISTICS (continued (MAX5924/MAX5925), EN1 (MAX5926) = +2.7V to +13.2V; EN2 (MAX5926 -40°C to +85°C, unless otherwise noted. Typical values are ...

Page 5

Hot-Swap Controllers ( 1µ 330nF SLEW GATE DRIVE VOLTAGE vs. TEMPERATURE 6 5 5. 3.0V CC ...

Page 6

Hot-Swap Controllers Require No Sense Resistor ( 1µ 330nF SLEW TURN-ON WAVEFORM (C = OPEN) SLEW GATE OUT PGOOD 200µs/div TURN-OFF WAVEFORM EN1 GATE PGOOD 2µs/div SHORT-CIRCUIT ...

Page 7

Hot-Swap Controllers ( 1µ 330nF SLEW OVERCURRENT FAULT AND AUTORETRY DELAY EN1 GATE SC_DET OUT 400ms/div UVLO RESPONSE >t DG GATE V CC 200µs/div _______________________________________________________________________________________ Require No ...

Page 8

Hot-Swap Controllers Require No Sense Resistor PIN MAX5924A/ MAX5924B/ MAX5924C/ MAX5924D/ MAX5926 MAX5925A/ MAX5925B/ MAX5925C MAX5925D — 4 — 4 — ...

Page 9

Hot-Swap Controllers BACKPLANE REMOVABLE CARD 2.25V TO 13. GND EN EN2 Figure 1. Typical Operating Circuit (Without R BACKPLANE REMOVABLE CARD 2.25V TO 13.2V ...

Page 10

Hot-Swap Controllers Require No Sense Resistor V CC CHARGE PUMP SLEW A CB 75kΩ R CBF 75kΩ I TC*** CB SENSE EN/(EN1***) V CC 0.8V 1.24V EN2*** Figure 3. Functional Diagram 10 ______________________________________________________________________________________ GATE 50kΩ 2µA ...

Page 11

Hot-Swap Controllers Detailed Description The MAX5924/MAX5925/MAX5926 are hot-swap con- troller ICs designed for applications where a line card is inserted into a live backplane. Normally, when a line card is plugged into a live backplane, the ...

Page 12

Hot-Swap Controllers Require No Sense Resistor The MAX5924/MAX5925/MAX5926 load-probing circuit- ry detects short-circuit conditions during startup. Load probing is active only when no external R detected. As the device begins load probing, SC_DET is connected to ...

Page 13

Hot-Swap Controllers Bilevel Fault Protection Bilevel Fault Protection in Startup Mode Bilevel fault protection is disabled in startup mode, and is enabled when V exceeds V GATE-VOUT end of the startup period. When ...

Page 14

Hot-Swap Controllers Require No Sense Resistor Undervoltage Lockout (UVLO) UVLO circuitry prevents the MAX5924/MAX5925/ MAX5926 from turning on the external MOSFET until V exceeds the UVLO threshold, V UVLO protects the external MOSFET from insufficient gate-drive ...

Page 15

Hot-Swap Controllers EN (MAX5924/MAX5925), EN1/ EN2 (MAX5926) The enable comparators control the on/off function of the MAX5924/MAX5925/MAX5926. Enable is also used to reset the fault latch in latch mode. Pull EN or EN1 low for 100µs ...

Page 16

Hot-Swap Controllers Require No Sense Resistor To determine the proper circuit-breaker resistor value use the following equation, which refers to Figure 12 TRIPSLOW ( = ...

Page 17

Hot-Swap Controllers Circuit-Breaker Temperature Coefficient In applications where the external MOSFET’s on-resis- tance is used as a sense resistor to determine overcur- rent conditions, a 3300ppm/°C temperature coefficient is desirable to compensate for the R ture ...

Page 18

Hot-Swap Controllers Require No Sense Resistor Table 4. Component Manufacturers COMPONENT MANUFACTURER Dale-Vishay Sense Resistors IRC Fairchild MOSFETs International Rectifier Optional Sense Resistor Select the sense resistor in conjunction with R the slow and fast circuit-breaker ...

Page 19

Hot-Swap Controllers Layout Considerations Keep all traces as short as possible and maximize the high-current trace dimensions to reduce the effect of undesirable parasitic inductance. Place the MAX5924/ MAX5925/MAX5926 close to the card’s connector. Use a ...

Page 20

Hot-Swap Controllers Require No Sense Resistor TOP VIEW SC_DET 2 MAX5924 EN 3 MAX5925 PGOOD (PGOOD) 4 GND 5 µMAX ( ) FOR THE MAX5924A, MAX5924C, MAX5925A, AND MAX5925C. Typical Operating Circuits TYPICAL ...

Page 21

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 21 © 2010 Maxim Integrated Products ...

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