+72V, SOT23/TDFN, Simple Swapper Hot-Swap Controllers

Transcription

1 ; Rev 3; 1/7 +72V, SOT23/TDFN, Simple Swapper Hot-Swap General Description The MAX592/MAX593 are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane without causing a glitch on the power-supply rail. These devices operate from +9V to +72V and provide the simplest hot-swap solution by eliminating all external components except the external p-channel MOSFET. The MAX592/MAX593 limit the inrush current to the load and provide a circuit-breaker function for overcurrent protection. During startup the circuit-breaker function is disabled and the MAX592/MAX593 limit the inrush current by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the circuit-breaker function is enabled and the MAX592/MAX593 provide overcurrent protection by monitoring the voltage drop across the external MOSFET s on-resistance. The MAX592/MAX593 include an undervoltage lockout (UVLO) function, control input, and a power-good status output, (MAX592) or (MAX593). A built-in thermal shutdown feature is also included to protect the external MOSFET in case of overheating. The MAX592/MAX593 offer latched or autoretry fault management and are available with 3mV, 4mV or 5mV circuit-breaker thresholds. Both the MAX592 and MAX593 are available in small SOT23 and TDFN packages, and are specified for the extended -4 C to +85 C temperature range. For specific ordering information, see the Selector Guide at the end of the data sheet. Network Routers Network Switches Base Station Line Cards TOP VIEW Applications Servers RAID Industrial Systems Pin Configurations MAX592 MAX () Features Wide +9V to +72V Operation Requires No External Sense Resistor Drives External p-channel MOSFET Limits Inrush Current Circuit-Breaker Function Less than 2mA Quiescent Current Input Permits Load Power-Supply Control and Sequencing Adjustable Undervoltage Lockout Power-Good Output with +72V Rating Latching or Automatic Retry Fault Management Thermal Shutdown Helps Protect the External MOSFET Available in Two Small Packages 6-Pin TDFN and SOT23 Ordering Information PART TEMP RANGE PIN- PACKAGE PKG CODE MAX592 EUT-T+* -4 C to +85 C 6 SOT23-6 U6F+6 MAX592 ETT-T+* -4 C to +85 C 6 TDFN-6 T633+2 MAX593 EUT-T+* -4 C to +85 C 6 SOT23-6 U6F+6 MAX593 ETT-T+* -4 C to +85 C 6 TDFN-6 T633+2 *For specific part numbers see the Selector Guide at end of data sheet. +Denotes lead-free package. BACKPLANE +48V CIRCUIT CARD Typical Operating Circuits HOT-SWAP CONTROLLER MAX592 IRFR541 5W ISOLATED POWER SUPPLY V IN (+) LUCENT JW5A1 V IN (-) MAX592/MAX593 SOT23-6 ( ) ARE FOR MAX593 ONLY. Pin Configurations continued at end of data sheet. Typical Operating Circuits 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 , or visit Maxim s website at

2 MAX592/MAX593 ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to unless otherwise noted),,,...-.3v to +76V...-.3V to +4V to...-12v to +.3V Current into any Pin...±3mA 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 Continuous Power Dissipation (T A = +7 C) 6-Pin SOT23 (derate 9.1mW/ C above +7 C)...727mW 6-Pin TDFN (derate 18.2mW/ C above +7 C) mW Junction to Case Thermal Resistance, θ JC (TDFN) C/W Maximum Junction Temperature C Storage Temperature Range...-6 C to +15 C ( = +9V to +72V, = V, open circuit, T A = -4 C to +85 C, unless otherwise noted. Typical values are at = +48V and T A = +25 C.) (Notes 1, 2) PARAMETER SYM B O L C O ND IT IO N S M IN T YP M A X U N IT S Supply Voltage 9 72 V Supply Current I M easur ed out of G N D, P GO O D or op en ci r cui t, D RAIN = 1 2 ma = +36V to +72V External Gate Drive V GS - V = +9V V Load Voltage Slew-Rate Magnitude SR dv /dt = +36V to +72V C L = 1µF = +9V Default Undervoltage Lockout V UVLO increasing V Undervoltage Lockout Hysteresis V/ms 3.5 V Pin Input Resistance R kω to Resistance R D 9 kω to Resistance R DS 65 kω Reference Threshold V V Increasing V Hysteresis 14 mv Start Delay (Note 3) t ON ms Off Delay (Note 4) t OFF - V < 1V ms MAX59 AEUT Circuit-Breaker Threshold V CB - V MAX59 BEUT MAX59 CEUT mv Circuit-Breaker Delay (Note 5) t CB until ( - V ) < 1V, 2mV C = 4.7nF 4 11 ( - V ) > V CB C = 1nF overdrive step C = 1nF 7 17 Restart Delay (Note 3) t RS After circuit breaker event, MAX59_ A_EUT only µs ms P ow er - G ood O utp ut Low V ol tag e V OL I OL = 1mA.3.6 V 2

3 ELECTRICAL CHARACTERISTICS (continued) ( = +9V to +72V, = V, open circuit, T A = -4 C to +85 C, unless otherwise noted. Typical values are at = +48V and T A = +25 C.) (Notes 1, 2) PARAMETER SYM B O L C O ND IT IO N S M IN T YP M A X U N IT S Power-Good Output Open-Drain Leakage Current I OH V = 72V (MAX592) V = 72V (MAX593) 1 µa Thermal Shutdown Temperature T SD Junction temperature +125 C Thermal Shutdown Hysteresis T HY 15 C Note 1: All currents into device pins are positive, all currents out of device pins are negative, and all voltages are referenced to, unless otherwise noted. Note 2: All specifications are 1% tested at T A = +25 C, unless otherwise noted. Specifications over -4 C to +85 C are guaranteed by characterization. Note 3: This is the delay time from a valid on condition until V GS begins rising. Valid on conditions are: the device is not in undervoltage lockout; is not driven low; and the device is not in thermal shutdown. Note 4: This is the delay from a valid low on until V GS falls. Pulses on less than t OFF are ignored, offering glitch immunity. Note 5: Guaranteed by characterization, not production tested. C is a capacitor from to. MAX592/MAX593 Typical Operating Characteristics ( = +48V, = V, and T A = +25 C, unless otherwise noted. See Figure 2 for test circuits.) SUPPLY CURRENT vs. INPUT VOLTAGE MAX592 toc V IN = +7V SUPPLY CURRENT vs. TEMPERATURE MAX592 toc V UVLO THRESHOLD vs. TEMPERATURE MAX592 toc3 SUPPLY CURRENT (ma) 1..9 SUPPLY CURRENT (ma) 1..9 V IN = +48V V IN = +12V LOCKOUT VOLTAGE (V) INCREASING V IN DECREASING V IN INPUT VOLTAGE (V) TEMPERATURE ( C) TEMPERATURE ( C) 3

4 MAX592/MAX593 Typical Operating Characteristics (continued) ( = +48V, = V, and T A = +25 C, unless otherwise noted. See Figure 2 for test circuits.) DRIVE (V) DRIVE VOLTAGE vs. INPUT VOLTAGE INPUT VOLTAGE (V) TURN-ON WAVEFORMS R L = OPEN, C L = 1µF MAX592 toc7 MAX592 toc4 TIMEOUT PERIOD (ms) RETRY TIMEOUT vs. TEMPERATURE TEMPERATURE ( C) TURN-ON WAVEFORMS R L = 6Ω, C L = 1µF MAX592 toc8 MAX592 toc5 A B C D A : V OUT, 5V/div B : I IN, 1A/div C : V, 5V/div D : V IN, 5V/div TURN-ON WAVEFORMS R L = 6Ω, C L = 1µF t = 2ms/div TURN-ON WAVEFORMS R L = 6Ω, C L = 1µF MAX592 toc6 MAX592 toc9 A A A B B B C C C A : V OUT, 5V/div B : I IN, 1A/div C : V, 2V/div t = 2ms/div CIRCUIT-BREAKER EVENT V OVERDRIVE = 2mV, C = 1pF MAX592 toc1 A : V OUT, 5V/div B : I IN,.5A/div C : V, 2V/div t = 2ms/div A : V OUT, 5V/div B : I IN, 1A/div C : V, 2V/div t = 2ms/div CIRCUIT-BREAKER EVENT V OVERDRIVE = 2mV, C = 1pF MAX592 toc11 A A B B C C t = 1µs/div A : V DS,.5V/div B : V GS, 1V/div C : V TO, 5V/div t = 1µs/div A : V DS,.5V/div B : V GS, 1V/div C : V TO, 5V/div 4

5 MAX592 PIN MAX593 NAME FUNCTION Pin Description 1 1 Positive Supply Voltage Input and External p-channel MOSFET Source Connection 2 2 Drain Sense Input for External p-channel MOSFET. Connect as close as possible to the MOSFET s drain and use wide circuit traces to assure good thermal coupling between the MAX592/MAX593 and the MOSFET. See Layout Guidelines Section. 3 3 Gate Drive Output for External p-channel MOSFET 4 4 Ground Connection Power-Good Output. is an n-channel, open-drain, active-low output, referenced to. Power-Good Output. is an n-channel, open-drain, active-high output, referenced to. Control Input. is referenced to. Drive above 1.38V or leave unconnected to enable the device. Drive below 1V to disable the device. is also used to adjust the UVLO threshold. Internally clamped to nominally 3V through a 1kΩ resistor (See Figure 1). (See the Undervoltage Lockout section in the Applications Information.) EP Exposed Pad (TDFN only). Connect to. MAX592/MAX593 Detailed Description The MAX592/MAX593 are integrated hot-swap controller ICs contained in 6-pin SOT23 and TDFN packages. They allow a board to be safely hot-plugged into a live backplane without causing a glitch on the powersupply rail. They are well suited for +48V power systems allowing cost-effective, simple, and compact design. The MAX592/MAX593 operate from +9V to +72V to cover a wide range of end equipment hot-swap needs. They require only an external p-channel power MOSFET to provide hot-swap control. Figure 1 shows a functional block diagram of the MAX592/MAX593. The MAX592/MAX593 controls an external p-channel power MOSFET placed in the positive power-supply pathway. When power is first applied, the MAX592/ MAX593 keep the MOSFET turned off. The MAX592/MAX593 hold the MOSFET off indefinitely if is held low, if the supply voltage is below the undervoltage lockout level, or if the die temperature exceeds +125 C. If none of these conditions exist for 15ms (typ), the MAX592/MAX593 begin to gradually turn on the MOSFET. During this turn-on phase, the MAX592/MAX593 slowly enhance the MOSFET, allowing the voltage on the load, i.e. the drain of the MOSFET, to rise at a rate of 9V/ms (typ). The inrush current to the load is thus limited to a level proportional to the load capacitance, and the constant slew rate. After * 828kΩ 1kΩ * 34.5kΩ 3V *9kΩ *65kΩ MAX592 MAX593 CONTROL LOGIC the MOSFET is fully enhanced, and the load voltage is settled to its final value, the MAX592A/ MAX593A and MAX592L/MAX593L monitor the voltage drop across the MOSFET. If the voltage drop exceeds the circuitbreaker threshold the MAX592A/MAX593A and ( ) ARE FOR THE MAX593 ONLY * RELATIVE TOLERANCE ±1%, ABSOLUTE TOLERANCE ±5% (TYP) Figure 1. Functional Block Diagram () 5

6 MAX592/MAX593 MAX592L/MAX593L turn off the MOSFET, disconnecting the load immediately. If no circuit-breaker fault exists, the MAX592/MAX593 assert the power-good output. Then, if any of four conditions exist, the powergood output deasserts and the MAX592/MAX593 turn off the MOSFET. The four conditions are: the voltage across the MOSFET exceeds the circuit-breaker threshold; the supply voltage falls below the undervoltage lockout level; the die temperature exceeds +125 C; or is forced low. After a circuit-breaker fault, the MAX592L/MAX593L keep the MOSFET off until the power is cycled, or the part is reset by toggling low for 1ms (typ). After a circuit-breaker fault, the MAX592A/MAX593A automatically restarts in 15ms (typ). All versions automatically restart after a V IN V I MAX592 thermal fault, or an undervoltage shutdown, if the fault condition goes away for at least 15ms (typ). offers external control of the MAX592/ MAX593, facilitating power-supply sequencing, and may also be used to change the undervoltage lockout (UVL) level. UVLO keeps the external MOSFET switched off as long as the input voltage is below the desired level. A power-good output, (MAX592) or (MAX593), asserts when the external MOSFET is fully enhanced and the source-drain voltage is below the circuit-breaker threshold. and are open-drain outputs referenced to, and can withstand up to +72V. 48V 5kΩ MAX592A TO.5V (a) SUPPLY CURRENT (d) RETRY TIMEOUT IRFR541 V IN V MAX592 5kΩ V 48V MAX592 R L C L (b) V UVLO (d) STARTUP WAVEFORMS 5Ω V IN V MAX592 V 48V MAX592 5kΩ (b) DRIVE VOLTAGE (d) CIRCUIT-BREAKER EVENT Figure 2. Test Circuits 6

7 +24V OPTIONAL D R2 4.2kΩ R1 3.1kΩ HOT-SWAP CONTROLLER A thermal shutdown feature protects the external MOS- FET by turning it off if the die temperature of the MAX592/MAX593 exceeds +125 C. The MAX592/ MAX593 must be in good thermal contact with the external MOSFET. See Layout Guidelines in the Applications section of the data sheet. A circuit-breaker function monitors the voltage across the external MOSFET, D, and turns off the MOSFET if D exceeds the circuit-breaker threshold, V CB. The circuit-breaker function is enabled after the MOSFET is fully enhanced. Three threshold voltage options are available 3mV, 4mV, and 5mV. One version is available with no circuit-breaker function. Fault management for the MAX592/MAX593 is offered with two different configurations; latched and automatic retry. Latched Circuit Breaker After a circuit-breaker trip event, the latched versions (MAX592L/MAX593L) drive to, turning off the external MOSFET, and () is deasserted. A latched off condition needs to be reset by toggling low for at least 1ms, or by cycling the power supply,. MAX592 MAX593 Figure 3. Programmed +18V Lockout, with Optional Optocoupler On/Off Control. No Circuit Breaker For the versions without a circuit breaker, MAX592N (MAX593N), () are asserted when the MOSFET is fully enhanced. Once powered up the MAX592N/MAX593N ignore the MOSFET drain-tosource voltage for applications where a circuit-breaker function is not desired. Applications Information Control Input The control input provides three functions: external control; setting of the UVLO level; and resetting after a circuit-breaker event has caused the MAX592L/MAX593L to turn off the external MOSFET. Pulling to for at least 1ms (t OFF ) forces the MAX592/MAX593 to turn off the external MOSFET (see Figure 3 for a circuit example). To reset the MAX592L/MAX593L after a circuit-breaker event, toggle to for at least 1ms (t OFF ). can be used to sequence power supplies. Connecting a capacitor from to will delay the rise of proportional to the capacitance and input impedance of, typically 33kΩ (Figure 4). The MAX592/MAX593 can be controlled by logiclevel signals. Logic-level signals of 3.3V or 1.8V may be directly connected to. For 5V logic level control, insert a series 47kΩ resistor as shown in Figure 5. C HOT-SWAP CONTROLLER #1 MAX592 MAX593 HOT-SWAP CONTROLLER #2 MAX592/MAX593 Automatic Retry Circuit Breaker After a circuit-breaker trip event, the automatic retry versions (MAX592A/MAX593A) drive to, turning off the external MOSFET, and () is deasserted. If the start conditions are met for a full 15ms (t RS ) the start sequence is re-initiated. The start conditions are: the device is not in UVLO; is not driven low; and the device is not in thermal shutdown. 2C Figure 4. Power-Supply Sequencing MAX592 MAX593 7

8 MAX592/MAX593 5V LOGIC 47kΩ HOT-SWAP CONTROLLER LOGIC CONTROL OF 3.3V OR LESS MAY BE CONNECTED DIRECTLY TO THE MAX592/MAX593. FOR 5V LOGIC CONTROL INSERT A SERIES 47kΩ RESISTOR AS SHOWN. Figure 5. Logic Control MAX592 MAX593 Turn-On and Turn-Off Delays After power is applied, or is released, there is a 15ms delay (t ON ) before the gate ramp is started. This delay is also the automatic restart time delay. In the event of a circuit-breaker condition or an overtemperature fault condition, the turn-off delay is less than 4µs. An undervoltage condition must exist for at least 1ms (t OFF ) before the MAX592/MAX593 turns off the external MOSFET. must be held low for at least 1ms (t OFF ) before the MAX592/MAX593 turns off the external MOSFET. Turn-off delay minimizes spurious shutdowns due to noisy signals or momentary voltage spikes, as well as preventing accidental resetting of the circuit-breaker latch (MAX592L/MAX593L). Thermal Shutdown A thermal shutdown feature helps protect the external MOSFET. If the die temperature of the MAX592/ MAX593 exceeds +125 C, the MOSFET is turned off. For accurate performance the MAX592/MAX593 must be in close thermal contact with the external MOS- FET. See the Layout Guidelines section for information. Due to the low power dissipation of the MAX592/MAX593, its junction temperature will typically be within a few degrees of the MOSFET. All versions of the MAX592/MAX593 automatically restart from a temperature fault when the junction temperature drops below +11 C. Undervoltage Lockout The MAX592/MAX593 turns off the external MOSFET if the magnitude of the input voltage is below the level set by for longer than 1ms (t OFF ). If is left unconnected, the lockout voltage (V UVLO ) defaults to 31.5V. V UVLO may also be set to any value within the power-supply range by using external resistors. To set the lockout voltage to a value between +9V +9V TO +72V 1kΩ HOT-SWAP CONTROLLER and +72V use a resistor divider connected between and, with the center node of the divider connected to. For example, use a 3kΩ resistor (R1 in Figure 3) from to and calculate the other resistor, R2, using: V R2 = R1 UVLO 1 V ON / OFF where V UVLO is the desired lockout voltage, and V is the reference threshold specified in the Electrical Characteristics table (typically 1.26V). Figure 3 shows an example circuit with V UVLO set for +18V. To defeat the UVLO simply connect a single 1kΩ resistor between and, as shown in Figure 6. The Power-Good Output The power-good output, (), is opendrain and asserts when the external MOSFET is fully enhanced and D is less than the circuit-breaker threshold (V CB ). For versions without the circuit-breaker function (MAX592N/MAX593N), () asserts when the external MOSFET is fully enhanced. () deasserts within 4µs when a circuitbreaker event occurs or if the die temperature exceeds +125 C. () deasserts if < V UVLO for longer than 1ms or is held low for longer than 1ms. The MAX592 is active-low and the MAX593 is active-high. Both are open-drain n-channel MOSFETs with their sources connected to, and can withstand up to +72V. MAX592 Figure 6. Defeating Undervoltage Lockout 8

9 Selecting a Circuit-Breaker Threshold The MAX592A/MAX593A and the MAX592L/ MAX593L offer a circuit-breaker function to protect the external MOSFET and the load from the potentially damaging effects of excessive current. As load current flows through the external MOSFET, a voltage, D, is generated from source to drain due to the MOSFET s on-resistance, R DS(ON). The MAX592A/MAX593A and MAX592L/MAX593L monitor D when the external MOSFET is fully enhanced. If D exceeds the circuit-breaker threshold the external MOSFET is turned off, and () is deasserted. To accommodate different MOSFETs and different load currents the MAX592/MAX593 are available with circuit-breaker threshold voltages of 3mV, 4mV, and 5mV. To determine the proper circuit-breaker threshold for an application use: V CB > (R DS(ON) ) (I OUT(MAX) ) where R DS(ON) is the on-resistance of the MOSFET and I OUT (MAX) is the maximum expected output current. The MAX592N/MAX593N have no circuit-breaker function. For these parts choose an external MOSFET which meets the load requirements. The circuit-breaker function is intended to protect against gross overcurrent or short-circuit conditions. During a gross overcurrent or short-circuit condition, the MAX592/MAX593 disconnect the load by disabling the external MOSFET. For calculating the circuitbreaker threshold use the MOSFET s R ON at the worst possible operating condition, and add a 2% overcurrent margin to the maximum circuit current. For instance, if a MOSFET has an R ON of.6ω at T A = +25 C, and a normalized on-resistance factor of 1.75 at T A = +13 C (from the MOSFET data sheet), the R ON used for calculation is the product of these two numbers, or (.6Ω) x (1.75) =.15Ω. Then, if the maximum current is expected to be 2A, using a 2% margin, the current for calculation is (2A) x (1.2) = 2.4A. The resulting minimum circuit-breaker threshold is then a product of these two results, or (.15Ω) x (2.4A) =.252V. The next highest minimum available threshold is.28v of the MAX592ABEUT, which is an ideal choice given these parameters. Using this method to choose a circuit-breaker threshold allows the circuit to operate under worst case conditions without causing a circuit-breaker fault, but the circuit-breaker function will still operate if a short circuit, or a gross overcurrent condition exists. GROUND POWER IN U1 SOT23-6 M1 SOT-223 S D G Figure 7. Circuit Board Layout Example. Determining Inrush Current Determining a circuit s inrush current is necessary to help choose the proper MOSFET. The MAX592/ MAX593 regulate the inrush current by means of controlling the load voltage slew rate, but inrush current is also a function of load capacitance. Determine inrush current using: I = C dv = C SR dt POWER OUT where C is the load capacitance, and SR is the MAX592/MAX593 Load Voltage Slew-Rate Magnitude from the Electrical Characteristics table. For example, assuming a load capacitance of 1µF, and using the typical value of 9V/ms for the slew rate, the inrush current is.9a typical. If the maximum possible Load Voltage Slew Rate is used, the maximum inrush current calculates to 1.8A. Choose a MOSFET with a maximum pulsed current specification that exceeds the maximum inrush current. MAXIMUM I LOAD (A) SUGGESTED EXTERNAL MOSFET MAX592/MAX593 SUGGESTED MAXIM PART.5 IRF954NS MAX592AAEUT 1 IRF954NS MAX592ABEUT 2 IRF521S MAX592ABEUT 3 IRF521S MAX592ACEUT VIN = +9V to +72V MAX592/MAX593 9

10 MAX592/MAX593 Suggested External MOSFETs Layout Guidelines Good thermal contact between the MAX592/ MAX593 and the external MOSFET is essential for the thermal shutdown feature to operate effectively. Place the MAX592/MAX593 as close as possible to the drain of the external MOSFET, and use wide circuit board traces for good heat transfer. See Figure 7 for an example of a PC board layout. TRANSISTOR COUNT: 658 PROCESS TECHNOLOGY: BiCMOS Chip Information 1

11 PART CIRCUIT-BREAKER FUNCTION CIRCUIT-BREAKER THRESHOLD (mv) POWER-GOOD OUTPUT LOGIC Selector Guide TOP MARK MAX592NNEUT+ None None Active-Low AASM MAX592AAEUT+ Autoretry 3 Active-Low AASA MAX592ABEUT+ Autoretry 4 Active-Low AASB MAX592ACEUT+ Autoretry 5 Active-Low AASC MAX592LAEUT+ Latched 3 Active-Low AASD MAX592LBEUT+ Latched 4 Active-Low AASE MAX592LCEUT+ Latched 5 Active-Low AASF MAX593NNEUT+ None None Active-High AASN MAX593AAEUT+ Autoretry 3 Active-High AASG MAX593ABEUT+ Autoretry 4 Active-High AASH MAX593ACEUT+ Autoretry 5 Active-High AASI MAX593LAEUT+ Latched 3 Active-High AASJ MAX593LBEUT+ Latched 4 Active-High AASK MAX593LCEUT+ Latched 5 Active-High AASL SOT23 MAX592/MAX593 PART CIRCUIT-BREAKER FUNCTION CIRCUIT-BREAKER THRESHOLD (mv) POWER-GOOD OUTPUT LOGIC TOP MARK MAX592NNETT+ None None Active-Low AKH MAX592AAETT+ Autoretry 3 Active-Low AKI MAX592ABETT+ Autoretry 4 Active-Low AKJ MAX592ACETT+ Autoretry 5 Active-Low AKK MAX592LAETT+ Latched 3 Active-Low AKL MAX592LBETT+ Latched 4 Active-Low AKM MAX592LCETT+ Latched 5 Active-Low AKN MAX593NNETT+ None None Active-High AKO MAX593AAETT+ Autoretry 3 Active-High AKP MAX593ABETT+ Autoretry 4 Active-High AKQ MAX593ACETT+ Autoretry 5 Active-High AKR MAX593LAETT+ Latched 3 Active-High AKS MAX593LBETT+ Latched 4 Active-High AKT MAX593LCETT+ Latched 5 Active-High AKU +Denotes lead-free package. TDFN 11

12 MAX592/MAX593 BACKPLANE +48V CIRCUIT CARD HOT-SWAP CONTROLLER MAX593 Typical Operating Circuits (continued) IRFR541 1MΩ 39kΩ 5W ISOLATED POWER SUPPLY V+ INDIV MAX53* *THE MAX53 IS A 11V PWM CONTROLLER Pin Configurations (continued) TOP VIEW MAX592 MAX () * EXPOSED PAD TDFN 3mm x 3mm ( ) ARE FOR MAX593 ONLY. * EXPOSED PAD CONNECTED TO. 12

13 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to 6LSOT.EPS MAX592/MAX593 13

14 MAX592/MAX593 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to 6, 8, &1L, DFN THIN.EPS PACKAGE OUTLINE, 6,8,1 & 14L, TDFN, EXPOSED PAD, 3x3x.8 mm H 1 2 COMMON DIMENSIONS SYMBOL MIN. MAX. A.7.8 D E A1..5 L.2.4 k.25 MIN. A2.2 REF. PACKAGE VARIATIONS PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e T ±.1 2.3±.1.95 BSC MO229 / WEEA.4± REF T ±.1 2.3±.1.95 BSC MO229 / WEEA.4± REF T833-1 T133-1 T ±.1 2.3±.1 1.7±.1 2.3±.1.65 BSC.4 BSC MO229 / WEEC ±.5.2± REF T ±.1 2.3±.1.65 BSC MO229 / WEEC.3± REF T ±.1 2.3±.1.65 BSC MO229 / WEEC.3± REF T ±.1 2.3±.1.5 BSC MO229 / WEED-3.25±.5 2. REF 1.5±.1 2.3±.1.5 BSC MO229 / WEED-3.25±.5 2. REF T ±.1 2.3± REF.4 BSC ± REF PACKAGE OUTLINE, 6,8,1 & 14L, TDFN, EXPOSED PAD, 3x3x.8 mm -DRAWING NOT TO SCALE H 2 2 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. 14 Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.