MAX652 MAXIM [Maxim Integrated Products], MAX652 Datasheet
MAX652
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MAX652 Summary of contents
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... The MAX649/MAX651/MAX652 have dropout voltages less than 1V and accept input voltages up to 16.5V. Output voltages are preset at 5V (MAX649), 3.3V (MAX651), and 3V (MAX652). These controllers can also be adjusted to any voltage from 1.5V to the input voltage by using two resistors. These step-down controllers drive external P-channel MOSFETs at loads greater than 10W ...
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... MAX652 16. REF = 0 REF = 0 REF ≤ 100µA, MAX649C/E, MAX65_C/E REF MAX649M, MAX65_M MAX649, 6V ≤ V+ ≤ 16V LOAD MAX651, 4.5V ≤ V+ ≤ 16V LOAD MAX652, 4V ≤ V+ ≤ 16V LOAD MIN TYP MAX UNITS 4.0 16 100 4 µ 1.470 1.5 1 ...
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... IN MAX651, 0 ≤ I ≤ 1.5A, LOAD MAX652, 0 ≤ I ≤ 1.5A, LOAD MAX649 10V LOAD MAX651 5V LOAD MAX652 5V LOAD MAX649C/E, MAX65_C/E MAX649M, MAX65_M = 0.001µ 12V = 0.001µ 12V MIN TYP MAX UNITS -47 -45 mV/A - µA 1 ...
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... TEMPERATURE (°C) MAX649 MAXIMUM LOAD CURRENT vs. SUPPLY VOLTAGE 2500 2000 1500 1000 OUT 500 CIRCUIT OF FIGURE 1415 INPUT VOLTAGE (V) MAX652 EFFICIENCY vs. LOAD CURRENT 100 90 80 TOP TO BOTTOM 4. ...
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... I = 100 A REF 0 -60 -40 - 100 120 140 TEMPERATURE (°C) DROPOUT VOLTAGE vs. LOAD CURRENT 1000 MAX649 OUT 900 MAX652 OUT 800 700 MAX651 3.3V 600 OUT 500 400 300 200 100 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 LOAD CURRENT (A) REFERENCE OUTPUT VOLTAGE vs ...
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Adjustable, High-Efficiency, Low I , Step-Down DC-DC Controllers Q _____________________________Typical Operating Characteristics (continued) MAX649 LINE-TRANSIENT RESPONSE 250 s/div LOAD A: INPUT VOLTAGE (7V & 12V), 5V/div B: 5V OUT, AC COUPLED, 100mV/div ______________________________________________________________Pin Description PIN ...
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... Calculate the peak current limit by dividing the Current-Limit Trip Level (see Electrical Characteristics ) by the value of the current-sense resistor. When SHDN is high, the MAX649/MAX651/MAX652 enter shutdown mode. In this mode, the internal biasing circuit turned off (including the reference) and the supply current drops to less than 5µ ...
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... Adjustable, High-Efficiency, Low I , Step-Down DC-DC Controllers Q MAX649 MAX651 MAX652 SHDN REF MINIMUM Q OFF-TIME TRIG ONE-SHOT MAXIMUM TRIG ON-TIME Q ONE-SHOT CURRENT CONTROL CIRCUITS Figure 2. Block Diagram 8 _______________________________________________________________________________________ V+ FB DUAL-MODE™ COMPARATOR ERROR COMPARATOR 1.5V REFERENCE CURRENT COMPARATOR 0.2V (FULL CURRENT) GND OUT N FROM V+ EXT CS 0 ...
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... This ringing expect- ed and poses no operational problems. The MAX649/MAX651/MAX652 are said dropout when the input voltage (V+) is low enough that the output drops below the minimum output voltage specification (see Electrical Characteristics ). ...
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... INPUT VOLTAGE (V) Figure 5a. MAX649 Current-Sense Resistor Graph __________________Design Procedure Setting the Output Voltage The MAX649/MAX651/MAX652 are preset for 5V, 3.3V, and 3V output voltages, respectively. Tie FB to GND for fixed-output operation. They may also be adjusted from 1.5V (the reference voltage) to the input voltage, using external resistors R2 and R3 configured as shown in Figure 4. For adjustable-output operation, 150kΩ ...
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... Using a slightly underrated inductor can sometimes reduce size and cost, with only a minor impact on efficiency. The MAX649/MAX651/MAX652 current limit prevents any damage from an underrated inductor’s low inductance at high currents. Table 1 lists inductor types and suppliers for various applications ...
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... Through-Hole RL 1284-22 12 ______________________________________________________________________________________ amount of noise at the voltage source caused by the switching action of the MAX649/MAX651/MAX652. The input voltage source impedance determines the size of the capacitor required at the V+ input. As with the output filter capacitor, a low-ESR capacitor is recommended. Bypass the IC separately with a 0.1µF ceramic capacitor placed close to the V+ and GND pins. Bypass REF with a 0.1µ ...
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... MAX652CPA 0°C to +70°C MAX652CSA 0°C to +70°C MAX652C/D 0°C to +70°C MAX652EPA -40°C to +85°C MAX652ESA -40°C to +85°C MAX652MJA -55°C to +125°C * Dice are tested +25°C. A **Contact factory for availability and processing to MIL-STD-883. ______________________________________________________________________________________ ...
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Adjustable, High-Efficiency, Low I , Step-Down DC-DC Controllers Q ________________________________________________________Package Information 14 ______________________________________________________________________________________ ...
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Adjustable, High-Efficiency, Low I ___________________________________________Package Information (continued) ______________________________________________________________________________________ , Step-Down DC-DC Controllers Q 15 ...
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Adjustable, High-Efficiency, Low I , Step-Down DC-DC Controllers Q 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 ...