MAX5902/MAX5903 19-1988 Rev 3 1/07 +72V, SOT23/TDFN, Simple Swapper Hot-Swap Controllers General Description Features The MAX5902/MAX5903 are hot-swap controllers that Wide +9V to +72V Operation allow a circuit card to be safely hot plugged into a live Requires No External Sense Resistor backplane without causing a glitch on the power-sup- ply rail. These devices operate from +9V to +72V and Drives External p-Channel MOSFET provide the simplest hot-swap solution by eliminating all Limits Inrush Current external components except the external p-channel MOSFET. Circuit-Breaker Function The MAX5902/MAX5903 limit the inrush current to the Less than 2mA Quiescent Current load and provide a circuit-breaker function for overcurrent protection. During startup the circuit-breaker function is ON/OFF Input Permits Load Power-Supply disabled and the MAX5902/MAX5903 limit the inrush cur- Control and Sequencing rent by gradually turning on the external MOSFET. Once Adjustable Undervoltage Lockout the external MOSFET is fully enhanced, the circuit-break- er function is enabled and the MAX5902/MAX5903 pro- Power-Good Output with +72V Rating vide overcurrent protection by monitoring the voltage Latching or Automatic Retry Fault Management drop across the external MOSFETs on-resistance. The MAX5902/MAX5903 include an undervoltage lock- Thermal Shutdown Helps Protect the External out (UVLO) function, ON/OFF control input, and a MOSFET power-good status output, PGOOD (MAX5902) or Available in Two Small Packages PGOOD (MAX5903). A built-in thermal shutdown fea- ture is also included to protect the external MOSFET in 6-Pin TDFN and SOT23 case of overheating. Ordering Information The MAX5902/MAX5903 offer latched or autoretry fault management and are available with 300mV, 400mV or PIN- PKG 500mV circuit-breaker thresholds. Both the MAX5902 and PART TEMP RANGE PACKAGE CODE MAX5903 are available in small SOT23 and TDFN pack- U6F+6 ages, and are specified for the extended -40C to +85C MAX5902 EUT-T+* -40C to +85C 6 SOT23-6 temperature range. For specific ordering information, see T633+2 MAX5902 ETT-T+* -40C to +85C 6 TDFN-6 the Selector Guide at the end of the data sheet. MAX5903 EUT-T+* -40C to +85C 6 SOT23-6 U6F+6 T633+2 MAX5903 ETT-T+* -40C to +85C 6 TDFN-6 Applications *For specific part numbers see the Selector Guide at end of Network Routers Servers data sheet. Network Switches RAID +Denotes lead-free package. Base Station Line Industrial Systems Typical Operating Circuits Cards Pin Configurations 50W ISOLATED BACKPLANE CIRCUIT CARD POWER SUPPLY IRFR5410 +48V TOP VIEW HOT-SWAP CONTROLLER V16 ON/OFF V (+) S IN LUCENT MAX5902 JW050A1 MAX5902 V GATE S DRAIN 2 5 PGOOD (PGOOD) MAX5903 ON/OFF DRAIN GND PGOOD ON/OFF GATE34 GND V (-) IN GND SOT23-6 Typical Operating Circuits continued at end of data sheet. ( ) ARE FOR MAX5903 ONLY. Pin Configurations continued at end of data sheet. Simple Swapper is a trademark of Maxim Integrated Products, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.+72V, SOT23/TDFN, Simple Swapper Hot-Swap Controllers ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND unless otherwise noted) Continuous Power Dissipation (T = +70C) A V , DRAIN, PGOOD, PGOOD ................................-0.3V to +76V 6-Pin SOT23 (derate 9.1mW/C above +70C)..........727mW S ON/OFF ....................................................................-0.3V to +4V 6-Pin TDFN (derate 18.2mW/C above +70C) .......1454mW GATE to V ............................................................-12V to +0.3V Junction to Case S Current into any Pin ............................................................3mA Thermal Resistance, (TDFN) ..............................8.5C/W JC Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-60C to +150C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +9V to +72V, GND = 0V, ON/OFF open circuit, T = -40C to +85C, unless otherwise noted. Typical values are at V = +48V S A S and T = +25C.) (Notes 1, 2) A PARAMETER SYMB O L C O NDIT IO N S M IN T YP M A X U N ITS Supply Voltage V 972V S M easured out of G N D , PGO O D or PGOOD I Supply Current GND 12 mA open cir cuit, D RAIN = V S V = +36V to +72V 910 11 S External Gate Drive V V - V V GS S GATE V = +9V 8 8.5 S V = +36V to +72V 59 18 S Load Voltage Slew-Rate dV /dt DRAIN SR V/ms Magnitude C = 10F L V = +9V 36 11 S Default Undervoltage Lockout V V increasing 28.5 31.5 34.5 V UVLO S Undervoltage Lockout 3.5 V Hysteresis R 19 32 52 k ON/OFF Pin Input Resistance ON/OFF R DRAIN to GND Resistance DGND 900 k DRAIN to V Resistance R 650 k S DS V V Increasing 1.14 1.26 1.38 V ON/OFF Reference Threshold ON/OFF ON/OFF ON/OFF Hysteresis 140 mV Start Delay (Note 3) t 80 150 280 ms ON t V - V < 1V 510 18 ms ON/OFF Off Delay (Note 4) OFF S GATE MAX590 AEUT 200 300 460 Circuit-Breaker Threshold V V - V MAX590 BEUT 280 400 540 mV CB S DRAIN MAX590 CEUT 400 500 660 (V - V ) > V C = 1nF 2 6.5 GATE S DRAIN CB until (V - V ) S GATE t C = 4.7nF Circuit-Breaker Delay (Note 5) CB GATE 411 s < 1V, 200mV C = 10nF overdrive step 717 GATE After circuit breaker event, Restart Delay (Note 3) t 80 150 280 ms RS MAX590 A EUT only P ow er - G ood O utp ut Low V olta ge V I = 1mA 0.3 0.6 V OL OL 2 MAX5902/MAX5903