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MAX797 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX797 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 32 page Step-Down Controllers with Synchronous Rectifier for CPU Power 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (V+ = 15V, GND = PGND = 0V, IVL = IREF = 0A, TA = 0°C to +70°C for MAX79_C, TA = 0°C to +85°C for MAX79_E, TA = -55°C to +125°C for MAX79_M, unless otherwise noted.) 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. V+ to GND .................................................................-0.3V, +36V GND to PGND........................................................................±2V VL to GND ...................................................................-0.3V, +7V BST to GND ...............................................................-0.3V, +36V DH to LX...........................................................-0.3V, BST + 0.3V LX to BST.....................................................................-7V, +0.3V SHDN to GND............................................................-0.3V, +36V SYNC, SS, REF, FB, SECFB, SKIP, DL to GND..-0.3V, VL + 0.3V CSH, CSL to GND .......................................................-0.3V, +7V VL Short Circuit to GND..............................................Momentary REF Short Circuit to GND ...........................................Continuous VL Output Current ...............................................................50mA Continuous Power Dissipation (TA = +70°C) SO (derate 8.70mW/°C above +70°C) ........................696mW Plastic DIP (derate 10.53mW/°C above +70°C) .........842mW CERDIP (derate 10.00mW/°C above +70°C) ..............800mW Operating Temperature Ranges MAX79_C_ _ ......................................................0°C to +70°C MAX79_E_ _....................................................-40°C to +85°C MAX79_MJE .................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10s) .....................................+300 Rising edge, hysteresis = 25mV Rising edge, hysteresis = 15mV SHDN = 2V, 0mA < IVL < 25mA, 5.5V < V+ < 30V Falling edge, hysteresis = 20mV (MAX799) CSH-CSL, negative CSH-CSL, positive Falling edge, hysteresis = 15mV (MAX796) 6V < V+ < 30V 25mV < (CSH-CSL) < 80mV 0mV < (CSH-CSL) < 80mV, FB = VL, 6V < V+ < 30V, includes line and load regulation External resistor divider (CSH-CSL) = 0V 0mV < (CSH-CSL) < 80mV CONDITIONS V 4.2 4.7 VL/CSL Switchover Voltage V 3.8 4.1 VL Fault Lockout Voltage V 4.7 5.3 VL Output Voltage -0.05 0 0.05 V 2.45 2.505 2.55 SECFB Regulation Setpoint mA 2.0 SS Fault Sink Current µA 2.5 4.0 6.5 SS Source Current 5.0 30 V 4.5 30 Input Supply Range -50 -100 -160 mV 80 100 120 Current-Limit Voltage %/V 0.04 0.06 Line Regulation 1.5 V 4.85 5.10 5.25 5V Output Voltage (CSL) V REF 6 Nominal Adjustable Output Voltage Range V 2.43 2.505 2.57 Feedback Voltage % 2.5 Load Regulation UNITS MIN TYP MAX PARAMETER MAX79_C MAX79_E/M 0mV < (CSH-CSL) < 80mV, FB = 0V, 4.5V < V+ < 30V, includes line and load regulation V 3.20 3.35 3.46 3.3V Output Voltage (CSL) +3.3V AND +5V STEP-DOWN CONTROLLERS FLYBACK/PWM CONTROLLER INTERNAL REGULATOR AND REFERENCE |
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