Datasheet MAX1771 (Maxim) - 2

MAX1771
12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller ABSOLUTE MAXIMUM RATINGS
Supply Voltage Operating Temperature Ranges V+ to GND ...-0.3V, 17V MAX1771C_ A ...0°C to +70°C EXT, CS, REF, SHDN, FB to GND ...-0.3V, (V+ + 0.3V) MAX1771E_ A ..-40°C to +85°C GND to AGND...0.1V, -0.1V MAX1771MJA ..-55°C to +125°C Continuous Power Dissipation (TA = +70°C) Junction Temperatures Plastic DIP (derate 9.09mW/°C above +70°C) ..727mW MAX1771C_ A/E_ A...+150°C SO (derate 5.88mW/°C above +70°C) ...471mW MAX1771MJA ..+175°C CERDIP (derate 8.00mW/°C above +70°C) ...640mW Storage Temperature Range ...-65°C to +160°C Lead Temperature (soldering, 10sec) ...+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
(V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX1771 (internal feedback resistors) 2.0 12.5 Input Voltage Range MAX1771C/E (external resistors) 3.0 16.5 V MAX1771MJA (external resistors) 3.1 16.5 Minimum Start-Up Voltage 1.8 2.0 V Supply Current V+ = 16.5V, SHDN = 0V (normal operation) 85 110 µA V+ = 10V, SHDN ≥ 1.6V (shutdown) 2 5 Standby Current µA V+ = 16.5V, SHDN ≥ 1.6V (shutdown) 4 V+ = 2V to 12V, over full load range, Output Voltage (Note 1) 11.52 12.0 12.48 V Circuit of Figure 2a Output Voltage Line Regulation V+ = 5V to 7V, VOUT = 12V 5 mV/V (Note 2) ILOAD = 700mA, Circuit of Figure 2a Output Voltage Load Regulation V+ = 6V, VOUT = 12V, ILOAD = 0mA to 20 mV/A (Note 2) 500mA, Circuit of Figure 2a Maximum Switch On-Time tON(max) 12 16 20 µs Minimum Switch Off-Time tOFF(min) 1.8 2.3 2.8 µs V+ = 5V, VOUT = 12V, ILOAD = 500mA, Efficiency 92 % Circuit of Figure 2a MAX1771C 1.4700 1.5 1.5300 Reference Voltage VREF IREF = 0µA MAX1771E 1.4625 1.5 1.5375 V MAX1771M 1.4550 1.5 1.5450 MAX1771C/E 4 10 REF Load Regulation 0µA ≤ IREF ≤ 100µA mV MAX1771M 4 15 REF Line Regulation 3V ≤ V+ ≤ 16.5V 40 100 µV/V MAX1771C 1.4700 1.5 1.5300 FB Trip Point Voltage VFB MAX1771E 1.4625 1.5 1.5375 V MAX1771M 1.4550 1.5 1.5450 2 Maxim Integrated