19-3264; Rev 0; 4/04 KIT ATION EVALU LE B A IL A AV Positive High-Voltage, Hot-Swap Controller The MAX5932 is a fully integrated hot-swap controller for +9V to +80V positive supply rails. The MAX5932 allows for the safe insertion and removal of circuit cards into a live backplane without causing glitches on the backplane power-supply rail. This device is pin and function compatible to LT1641-1. The MAX5932 features a programmable foldback-current limit. If the device remains in current limit for more than a programmable time, the external n-channel MOSFET latches off. Other features include a programmable undervoltage lockout and a programmable output-voltage slew rate through an external n-channel MOSFET. The MAX5932 provides a power-good output (PWRGD) to indicate the status of the output voltage. For a variety of PWRGD/PWRGD, latch/autoretry-fault management, autoretry duty-cycle options, refer to the MAX5933 and MAX5934 data sheets. The MAX5932 operates in the -40°C to +85°C extended temperature range. This device is available in an 8-pin SO package. Features ♦ Pin and Function Compatible with LT1641-1 ♦ Provides Safe Hot Swap for +9V to +80V Power Supplies ♦ Safe Board Insertion and Removal from Live Backplanes ♦ Active-High Power-Good Output (PWRGD) ♦ Programmable Foldback-Current Limiting ♦ High-Side Drive for an External N-Channel MOSFET ♦ Undervoltage Lockout (UVLO) ♦ Overvoltage Protection ♦ Latched Fault Management ♦ User-Programmable Supply Voltage Power-Up Rate Ordering Information Applications Hot Board Insertion Electronic Circuit Breaker PART MAX5932ESA TEMP RANGE PIN-PACKAGE -40°C to +85°C 8 SO Industrial High-Side Switch/Circuit Breaker Network Routers and Switches 24V/48V Industrial/Alarm Systems Pin Configuration TOP VIEW Typical Application Circuit appears at end of data sheet. ON 1 8 VCC 7 SENSE 3 6 GATE GND 4 5 TIMER FB 2 MAX5932 PWRGD SO ________________________________________________________________ Maxim Integrated Products 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. 1 MAX5932 General Description MAX5932 Positive High-Voltage, Hot-Swap Controller ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) VCC .........................................................................-0.3V to +85V SENSE, FB, ON ..........................................-0.3V to (VCC + 0.3V) TIMER, PWRGD......................................................-0.3V to +85V GATE ......................................................................-0.3V to +95V Maximum GATE Current ....................................-50mA, +150mA Maximum Current into Any Other Pin................................±50mA Continuous Power Dissipation (TA = +70°C) 8-Pin SO (derate 5.9mW/°C above +70°C)..................470mW Operating Temperature Range ...........................-40°C to +85°C Maximum Junction Temperature .....................................+150°C Storage Temperature Range .............................-60°C to +150°C ESD Rating (Human Body Model)......................................2000V Lead Temperature (soldering, 10s) .................................+300°C 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 (VCC = +24V, GND = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Supply Voltage Range VCC Supply Current ICC CONDITIONS MIN TYP MAX 80 V 1.4 3.5 mA 8.3 8.8 V 9 VON = 3V, VCC = 80V VCC Undervoltage Lockout VLKO VCC Undervoltage Lockout Hysteresis VLKOHYST FB High-Voltage Threshold VFBH FB low-to-high transition 1.280 1.313 1.345 VFBL FB high-to-low transition 1.221 1.233 1.245 FB Low-Voltage Threshold FB Hysteresis FB Input Bias Current FB Threshold Line Regulation VCC low-to-high transition 7.5 0.4 VFBHYST V 80 IINFB VFB = 0V ∆VFB 9V ≤ VCC ≤ 80V, ON = 0V, TA = 0°C to +70°C -1 UNITS V V mV +1 µA 0.05 mV/V VFB = 0V, TA = 0°C to +70°C 8 12 17 VFB = 1V, TA = 0°C to +70°C 39 47 55 IGATEUP Charge pump on, VGATE = 7V -5 -10 -20 µA IGATEDN Any fault condition, VGATE = 2V mA SENSE Trip Voltage (VCC - VSENSE) VSENSETRIP GATE Pullup Current GATE Pulldown Current 35 70 100 VCC = 10.8V to 20V 4.5 6.2 18 VCC = 20V to 80V 10 13.6 18 mV ∆VGATE VGATE - VCC TIMER Pullup Current ITIMERUP VTIMER = 0V -24 -80 -120 µA TIMER Pulldown Current ITIMERON VTIMER = 1V 1.5 3 4.5 µA ON Logic-High Threshold VONH ON low-to-high transition 1.280 1.313 1.355 V ON Logic-Low Threshold VONL ON high-to-low transition 1.221 1.233 1.245 External N-Channel Gate Drive ON Hysteresis ON Input Bias Current PWRGD Leakage Current PWRGD Output Low Voltage SENSE Input Bias Current Thermal Shutdown Thermal Shutdown Hysteresis 2 VONHYST IINON IOH VOL ISENSE 80 VON = 0V V mV +1 µA VPWRGD = 80V 10 µA IO = 2mA 0.4 IO = 4mA 2.5 VSENSE = 0V to VCC Temperature rising -1 V -1 +3 V µA 150 °C 20 °C _______________________________________________________________________________________ Positive High-Voltage, Hot-Swap Controller (VCC = +24V, GND = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ON Low-to-GATE Low Propagation Delay tPHLON CGATE = 0, Figures 1, 2 6 µs ON High-to-GATE High Propagation Delay tPLHON CGATE = 0, Figures 1, 2 1.7 µs FB Low-to-PWRGD Low Propagation Delay tPHLFB Figures 1, 3 3.2 µs FB High-to-PWRGD High Propagation Delay tPLHFB Figures 1, 3 1.5 µs (VCC - VSENSE) High-to-GATE Low Propagation Delay tPHLSENSE TA = +25°C, CGATE = 0, Figures 1, 4 0.5 2 µs Note 1: All currents into the device are positive and all currents out of the device are negative. All voltages are referenced to ground, unless noted otherwise. _______________________________________________________________________________________ 3 MAX5932 ELECTRICAL CHARACTERISTICS (continued) Positive High-Voltage, Hot-Swap Controller MAX5932 Test Circuit and Timing Diagrams ON VCC 24V MAX5932 FB SENSE 1.313V 1.233V ON tPLHON 5V PWRGD GATE 5kΩ GND Figure 2. ON to GATE Timing 1.313V 1.233V VCC - SENSE tPHLFB GATE FB tPLHFB 1V Figure 3. FB to PWRGD Timing 4 1V TIMER Figure 1. Test Circuit PWRGD 5V GATE 10nF tPHLON 1V 47mV tPHLSENSE VCC Figure 4. SENSE to GATE Timing _______________________________________________________________________________________ Positive High-Voltage, Hot-Swap Controller ICC (mA) 1.5 1.245 2.0 TA = +85°C TA = +25°C 2.5 FB LOW-VOLTAGE THRESHOLD (V) 2.1 1.250 MAX5932 toc02 2.4 1.2 VCC = 48V 1.5 0.9 1.0 TA = -40°C 0.6 VCC = 24V 0.5 0.3 1.235 1.230 1.225 1.220 1.215 1.210 1.205 0 0 8 16 24 32 40 48 56 64 72 80 1.200 -40 -15 10 35 85 60 -40 10 35 60 TEMPERATURE (°C) TEMPERATURE (°C) FB HIGH-VOLTAGE THRESHOLD vs. TEMPERATURE FB HYSTERESIS vs. TEMPERATURE IGATE PULLUP CURRENT vs. TEMPERATURE 0.11 1.330 1.325 0.10 FB HYSTERESIS (V) 1.320 1.315 1.310 1.305 1.300 -5 -6 IGATE PULLUP CURRENT (µA) MAX5932 toc04 1.335 0.09 0.08 0.07 0.06 1.295 1.290 0.05 0.04 1.280 -15 10 35 60 -15 10 35 85 60 -10 -11 -15 35 12 11 10 9 8 VCC = 10.8V 60 85 MAX5932 toc08 16 14 GATE DRIVE (VGATE - VCC) (V) VCC = 48V 13 10 TEMPERATURE (°C) GATE DRIVE vs. VCC MAX5932 toc07 GATE DRIVE (VGATE - VCC) (V) -9 -40 GATE DRIVE vs. TEMPERATURE 15 7 -8 TEMPERATURE (°C) TEMPERATURE (°C) 14 -7 -13 -40 85 85 -12 1.285 -40 -15 VCC (V) MAX5932 toc05 0 FB HIGH-VOLTAGE THRESHOLD (V) 1.240 MAX5932 toc06 ICC (mA) 3.0 MAX5932 toc01 2.7 1.8 FB LOW-VOLTAGE THRESHOLD vs. TEMPERATURE ICC vs. TEMPERATURE MAX5932 toc03 ICC vs. VCC 12 10 8 6 4 2 6 5 0 -40 -15 10 35 TEMPERATURE (°C) 60 85 0 20 40 60 80 VCC (V) _______________________________________________________________________________________ 5 MAX5932 Typical Operating Characteristics (VCC = +48V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +48V, TA = +25°C, unless otherwise noted.) TIMER PULLUP CURRENT vs. TEMPERATURE ON HIGH-VOLTAGE THRESHOLD vs. TEMPERATURE TIMER PULLUP CURRENT vs. VCC -70 -75 -80 TA = +85°C TA = +25°C -75 -76 TA = 0°C -77 TA = -40°C -78 -85 -79 -90 -40 -15 10 35 1.323 1.313 1.303 1.293 10 20 30 40 50 60 80 70 -40 1.245 1.235 1.225 MAX5932 toc13 0.081 0.079 0.077 0.075 1.215 1.205 0.073 -40 -15 10 35 60 85 -40 -15 TEMPERATURE (°C) 85 14 12 10 8 6 TA = -40°C MAX5932 toc15 16 TA = +85°C 60 50 SENSE REGULATION VOLTAGE (mV) MAX5932 toc14 18 TA = +25°C 35 SENSE REGULATION VOLTAGE vs. VFB PWRGD VOUT LOW vs. ILOAD 4 10 TEMPERATURE (°C) 20 PWRGD VOUT LOW (V) 60 ON HYSTERESIS vs. TEMPERATURE ON HYSTERESIS (V) 1.255 35 0.083 MAX5932 toc12 1.265 10 TEMPERATURE (°C) ON LOW-VOLTAGE THRESHOLD vs. TEMPERATURE 45 40 35 30 25 20 15 10 5 2 0 0 10 30 50 ILOAD (mA) 6 -15 VCC (V) TEMPERATURE (°C) ON LOW-VOLTAGE THRESHOLD (V) 1.333 1.283 0 85 60 MAX5932 toc11 -74 1.343 ON HIGH-VOLTAGE THRESHOLD (V) TIMER PULLUP CURRENT (µA) -65 MAX5932 toc10 -73 MAX5932 toc09 -60 TIMER PULLUP CURRENT (µA) MAX5932 Positive High-Voltage, Hot-Swap Controller 70 90 0 0.2 0.4 0.6 0.8 VFB (V) _______________________________________________________________________________________ 1.0 85 Positive High-Voltage, Hot-Swap Controller PIN NAME FUNCTION 1 ON On/Off Control Input. ON is used to implement the undervoltage lockout threshold and resets the part after a fault condition (see the Detailed Description section). 2 FB Power-Good Comparator Input. Connect a resistive divider from output to FB to GND to monitor the output voltage (see the Power-Good Detection section). FB is also used as a feedback for the current-limit foldback function. 3 PWRGD Open-Drain Power-Good Output. PWRGD is high when VFB is higher than VFBH. PWRGD is low when VFB is lower than VFBL. 4 GND Ground Timing Input. Connect a capacitor from TIMER to GND to program the maximum time the part is allowed to remain in current limit (see the TIMER section). 5 TIMER 6 GATE Gate-Drive Output. The high-side gate drive for the external n-channel MOSFET (see the GATE section). 7 SENSE Current-Sense Input. Connect a sense resistor from VCC to SENSE and the drain of the external n-channel MOSFET. 8 VCC Power-Supply Input. Bypass VCC to GND with a 0.1µF capacitor. Input voltage range is from +9V to +80V. _______________________________________________________________________________________ 7 MAX5932 Pin Description Positive High-Voltage, Hot-Swap Controller MAX5932 Functional Diagram FB VCC SENSE MAX5932 VP GEN CHARGE PUMP AND GATE DRIVER REF GEN 0.5V PWRGD GATE OPEN DRAIN 1.233V ON VCC UNDERVOLTAGE LOCKOUT 8.3V LOGIC VP 0.5V 80µA 1.233V TIMER 3µA GND 8 _______________________________________________________________________________________ Positive High-Voltage, Hot-Swap Controller The MAX5932 monitors the input voltage, the output voltage, the output current, and the die temperature. This device features a power-good output (PWRGD) to indicate the status of the output voltage by monitoring the voltage at FB (see the Power-Good Detection section). As shown in Figure 5, a sense resistor is connected between VCC and SENSE to sense the load current. The device regulates the voltage across the sense resistor (VIN - VSENSE) to 47mV when the voltage at FB ≥ 0.5V. The current-limit threshold (V SENSETRIP ) decreases linearly from 47mV to 12mV as FB decreases from 0.5V to 0V. An undervoltage fault is detected when ON goes below the threshold, VONL = 1.233V, which causes the voltage at GATE to go low, and results in turning off the MOSFET. To turn the MOSFET on again, ON must pass the VONH = 1.313V threshold. The MAX5932 is a fully integrated hot-swap controller for positive supply rails. The device allows for the safe insertion and removal of circuit cards into live backplanes without causing glitches on the backplane power-supply rail. During startup the MAX5932 acts as a current regulator using an external sense resistor and MOSFET to limit the amount of current drawn by the load. The MAX5932 features latched-off fault management. When an overcurrent or an overtemperature fault occurs, the MAX5932 turns the external MOSFET off and keeps it off. After the fault condition goes away, cycle the power supply or toggle ON low and high again to unlatch the device. The MAX5932 operates from +9V to +80V supply voltage range and has a default undervoltage lockout (UVLO) set to +8.3V. The UVLO threshold is adjustable using a resistive divider connected from VCC to ON to GND (see R1 and R2 in Figure 5). RSENSE 0.025Ω VIN 24V Q1 IRF530 CL R1 49.9kΩ 1% R5 10Ω 5% R6 1kΩ 5% 0.1µF 8 VCC 1 7 SENSE TIMER R7 24kΩ 5% C1 10nF GATE 2 R4 3.57kΩ 1% MAX5932 5 R3 59kΩ 1% 6 FB ON R2 3.4kΩ 1% C2 0.68µF D1 CMPZ5248B PWRGD 3 PWRGD GND 4 GND Figure 5. Application Circuit _______________________________________________________________________________________ 9 MAX5932 Detailed Description MAX5932 Positive High-Voltage, Hot-Swap Controller Applications Information Hot-Circuit Insertion When circuit boards are inserted into a live backplane, the supply bypass capacitors on the boards draw high peak currents from the backplane power bus as they charge up. The transient currents can permanently damage the connector pins and glitch the system supply, causing other boards in the system to reset. Power-Up Sequence The power supply on a board is controlled by placing an external n-channel MOSFET (Q1) in the power path (Figure 5). Resistor RSENSE provides current detection and capacitor C1 provides control of the GATE slew rate. Resistor R6 provides current control-loop compensation while R5 prevents high-frequency oscillations in Q1. Resistors R1 and R2 provide undervoltage sensing. After the power pins first make contact, transistor Q1 is turned off. When the voltage at ON exceeds the turn-on threshold voltage, the voltage on VCC exceeds the undervoltage lockout threshold, and the voltage on TIMER is less than 1.233V, transistor Q1 turns on (Figure 6). The voltage at GATE rises with a slope equal to 10µA/C1 and the supply inrush current is set at: IINRUSH = CL x 10µA/C1 When the voltage across the current-sense resistor RSENSE reaches VSENSETRIP, then the inrush current is limited by the internal current-limit circuitry that adjusts the voltage on GATE to maintain a constant voltage across the sense resistor. Once the voltage at the output has reached its final value, as sensed by resistors R3 and R4, PWRGD goes high. POWER-UP WAVEFORMS Short-Circuit Protection The MAX5932 features a programmable foldback current limit with an electronic circuit breaker that protects against short circuits or excessive supply currents. The current limit is set by placing a sense resistor between VCC (pin 8) and SENSE (pin 7). To prevent excessive power dissipation in the pass transistor and to prevent voltage spikes on the input supply during short-circuit conditions at the output, the current folds back as a function of the output voltage that is sensed at FB (Figure 7). When the voltage at FB is 0V, the current-limit circuit drives GATE to force a constant 12mV drop across the sense resistor. As the output voltage at FB increases, the voltage across the sense resistor increases until FB reaches 0.5V, at the point that the voltage across the sense resistor is held constant at 47mV. The maximum current limit is calculated as: ILIMIT = 47mV/RSENSE For a 0.025Ω sense resistor, the current limit is set at 1.88A and folds back to 480mA when the output is shorted to ground. The MAX5932 also features a variable overcurrent response time. The time required to regulate Q1’s drain current depends on: • Q1’s input capacitance. • GATE capacitor C1 and compensation resistor R6. • The internal delay from SENSE to GATE. Figure 8 shows the delay from a voltage step at SENSE until GATE voltage starts falling, as a function of overdrive. VCC - VSENSE GATE 50V/div 47mV ISENSE 2A/div OUTPUT 50V/div 12mV PWRGD 50V/div 0V 0.5V VFB 20ms/div Figure 6. Power-Up Waveforms 10 Figure 7. Current-Limit Sense Voltage vs. Feedback Voltage ______________________________________________________________________________________ Positive High-Voltage, Hot-Swap Controller SHORT-CIRCUIT WAVEFORMS OUTPUT 50V/div 12 PROPAGATION DELAY (µs) MAX5932 RESPONSE TIME TO OVERCURRENT 14 10 ISENSE 1A/div 8 GATE 50V/div 6 4 TIMER 1V/div 2 0 0 100 200 300 10ms/div VCC - VSENSE (mV) Figure 8. Response Time to Overcurrent Figure 9. Short-Circuit Waveforms TIMER TIMER provides a method for programming the maximum time the device is allowed to operate in current limit. When the current-limit circuitry is not active, TIMER is pulled to GND by a 3µA current source. After the current-limit circuit becomes active, an 80µA pullup current source is connected to TIMER and the voltage rises with a slope equal to 77µA/CTIMER as long as the current-limit circuit remains active. Once the desired maximum current-limit time is chosen, the capacitor value is calculated using the following equations: C(nF) = 65 x t(ms) or TLIMIT = (CTIMER/80µA) x 1.233V When the current-limit circuit turns off, TIMER is discharged to GND by the 3µA current source. Whenever TIMER reaches 1.233V, the internal fault latch is set. GATE is immediately pulled to GND and TIMER is pulled back to GND by the 3µA current source. When TIMER falls below 0.5V, ON is pulsed low to reset the internal fault latch. The waveform in Figure 9 shows how the output latches off following a short circuit. The drop across the sense resistor is held at 12mV as the timer ramps up. Since the output did not rise, FB remains below 0.5V and the circuit latches off. For Figure 9, CT = 100nF. Undervoltage and Overvoltage Detection ON can be used to detect an undervoltage condition at the power-supply input. ON is internally connected to an analog comparator with 80mV of hysteresis. If ON falls below its threshold voltage (1.233V), GATE is pulled low and is held low until ON is high again. Figure 10 shows an overvoltage detection circuit. When the input voltage exceeds the Zener diode’s breakdown voltage, D1 turns on and starts to pull TIMER high. After TIMER is pulled higher than 1.233V, the fault latch is set and GATE is pulled to GND immediately, turning off transistor Q1 (see Figure 11). Operation is restored either by interrupting power or by pulsing ON low. Power-Good Detection The MAX5932 includes a comparator for monitoring the output voltage. The noninverting input (FB) is compared against an internal 1.233V precision reference and exhibits 80mV hysteresis. The comparator’s output (PWRGD) is an open drain one capable of operating from a pullup as high as 80V. The PWRGD can be used to directly enable/disable a power module with an active-high enable input. Figure 12 shows how to use PWRGD to control an active-low enable-input power module. Signal inversion is accomplished by transistor Q2 and R7 or use MAX5933. Supply Transient Protection The MAX5932 is 100% tested and guaranteed to be safe from damage with supply voltages up to 80V. However, spikes above 85V may damage the device. During a short-circuit condition, the large change in currents flowing through the power-supply traces can cause inductive voltage spikes that could exceed 85V. To minimize the spikes, the power-trace parasitic inductance should be minimized by using wider traces or heavier trace plating and a 0.1µF bypass capacitor placed between V CC and GND. A transient voltage suppressor (TVS) at the input can also prevent damage from voltage surges. ______________________________________________________________________________________ 11 MAX5932 Positive High-Voltage, Hot-Swap Controller RSENSE 0.025Ω Q1 IRF530 VIN CL SHORT PIN R1 49.9kΩ 1% D1 30V 1N5256B R5 10Ω 5% 0.1µF 8 VCC 1 D2 CMPZ5248B 7 SENSE R6 1kΩ 5% C1 10nF GATE 2 R4 3.57kΩ 1% MAX5932 R2 3.4kΩ 1% 5 TIMER C2 0.68µF R7 24kΩ 5% 6 FB ON R3 59kΩ 1% PWRGD 3 PWRGD GND 4 GND Figure 10. Overvoltage Detection GATE Voltage OVERVOLTAGE WAVEFORMS IN 50V/div ISENSE 5A/div GATE 50V/div A curve of Gate Drive vs. VCC is shown in Figure 13. GATE is clamped to a maximum voltage of 18V above the input voltage. At a minimum input-supply voltage of 9V, the minimum gate-drive voltage is 4.5V. When the inputsupply voltage is higher than 20V, the gate-drive voltage is at least 10V and a standard n-channel MOSFET can be used. In applications over a 9V to 20V range, a logic-level n-FET must be used with a proper protection Zener diode between its gate and source (as D1 shown in Figure 5). Thermal Shutdown TIMER 10V/div OUTPUT 50V/div 10µs/div If the MAX5932 die temperature reaches +150°C, an overtemperature fault is generated. As a result, GATE goes low and turns the external MOSFET off. The MAX5932 die temperature must cool down below +130°C before the overtemperature fault condition is removed. Figure 11. Overvoltage Waveforms 12 ______________________________________________________________________________________ Positive High-Voltage, Hot-Swap Controller Q1 IRF530 VIN SHORT PIN R1 294kΩ 1% 0.1µF 8 1 D1 CMPZ5248B R5 10Ω 5% 7 SENSE VCC R6 1kΩ 5% 5 TIMER CL 220µF VIN+ VOUT+ VOUT ON/OFF VIN- VOUT- 2 R4 4.22kΩ 1% PWRGD C2 0.68µF R7 47kΩ 5% C1 10nF GATE FB ON R3 143kΩ 1% 6 MAX5932 R2 10.2kΩ 1% MAX5932 RSENSE 0.01Ω 3 GND 4 GND Figure 12. Active-Low Enable Module Layout Considerations GATE DRIVE vs. VCC 16 GATE DRIVE (VGATE - VCC) (V) 14 12 10 8 6 4 2 0 0 20 40 VCC (V) 60 80 To achieve accurate current sensing, a Kelvin connection is recommended. The minimum trace width for 1oz copper foil is 0.02in per amplifier to make sure the trace stays at a reasonable temperature. Using 0.03in per amplifier or wider is recommended. Note that 1oz copper exhibits a sheet resistance of about 530µΩ/square. Small resistances add up quickly in high-current applications. To improve noise immunity, connect the resistor-divider to ON close to the device and keep traces to VCC and GND short. A 0.1µF capacitor from ON to GND also helps reject induced noise. Figure 14 shows a layout that addresses these issues. External MOSFET must be thermally coupled to the MAX5932 to ensure proper thermal shutdown operation (see Figure 14). Figure 13. Gate Drive vs. Supply Voltage ______________________________________________________________________________________ 13 Positive High-Voltage, Hot-Swap Controller MAX5932 Chip Information TRANSISTOR COUNT: 1573 PROCESS: BiCMOS IRF530 Figure 14. Recommended Layout for R1, R2, and RSENSE Typical Application Circuit RSENSE 0.01Ω Q1 IRF530 VIN CL *SMBJ51A R1 49.9kΩ 1% R5 10Ω 5% 0.1µF 8 VCC 1 7 SENSE R6 1kΩ 5% TIMER R7 24kΩ 5% C1 10nF GATE 2 R4 3.57kΩ 1% MAX5932 5 R3 59kΩ 1% 6 FB ON R2 3.4kΩ 1% C2 0.68µF D1 CMPZ5248B PWRGD 3 GND 4 GND *DIODES, INC. 14 ______________________________________________________________________________________ PWRGD Positive High-Voltage, Hot-Swap Controller N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS DIM A A1 B C e E H L 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0∞-8∞ A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 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 ____________________ 15 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX5932 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 www.maxim-ic.com/packages.)