Datasheet MAX1771 (Maxim) - 3
| 制造商 | Maxim |
| 描述 | 12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller |
| 页数 / 页 | 16 / 3 — 12V or Adjustable, High-Efficiency,. Low IQ, Step-Up DC-DC Controller. … |
| 文件格式/大小 | PDF / 782 Kb |
| 文件语言 | 英语 |
12V or Adjustable, High-Efficiency,. Low IQ, Step-Up DC-DC Controller. ELECTRICAL CHARACTERISTICS (continued). PARAMETERS
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MAX1771
12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETERS SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX1771C ±20 FB Input Current IFB MAX1771E ±40 nA MAX1771M ±60 SHDN Input High Voltage VIH V+ = 2V to 16.5V 1.6 V SHDN Input Low Voltage VIL V+ = 2V to 16.5V 0.4 V SHDN Input Current V+ = 16.5V, SHDN = 0V or V+ ±1 µA MAX1771C/E 85 100 115 Current-Limit Trip Level VCS V+ = 5V to 16V mV MAX1771M 75 100 125 CS Input Current 0.01 ±1 µA EXT Rise Time V+ = 5V, 1nF from EXT to ground 55 ns EXT Fall Time V+ = 5V, 1nF from EXT to ground 55 ns
Note 1:
Output voltage guaranteed using preset voltages. See Figures 4a–4d for output current capability versus input voltage.
Note 2:
Output voltage line and load regulation depend on external circuit components.
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT LOAD CURRENT vs. (BOOTSTRAPED MODE) (NON-BOOTSTRAPED MODE) MINIMUM START-UP INPUT VOLTAGE
100 100 02 700 – 95 V VOUT = 12V, CIRCUIT OF FIGURE 2a IN = 10V 95 600 MAX1771–01 VIN =10V MAX1771 MAX1771-TOC3 EXTERNAL FET THRESHOLD 90 V 90 LIMITS FULL-LOAD START-UP ) IN = 8V ) 500 % % V BELOW 3.5V IN = 8V 85 85 400 V 80 IN = 3V 80 VIN = 5V 300 75 EFFICIENCY ( V 75 IN = 5V EFFICIENCY ( 70 70 LOAD CURRENT (mA) 200 VOUT = 12V VOUT = 12V 65 CIRCUIT OF 65 CIRCUIT OF 100 FIGURE 2a FIGURE 2b 60 60 0 1 10 100 1000 10,000 1 10 100 1000 10,000 2.00 2.25 2.50 2.75 3.00 3.25 3.50 LOAD CURRENT (mA) LOAD CURRENT (mA) MINIMUM START-UP INPUT VOLTAGE (V) Maxim Integrated 3
12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETERS SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX1771C ±20 FB Input Current IFB MAX1771E ±40 nA MAX1771M ±60 SHDN Input High Voltage VIH V+ = 2V to 16.5V 1.6 V SHDN Input Low Voltage VIL V+ = 2V to 16.5V 0.4 V SHDN Input Current V+ = 16.5V, SHDN = 0V or V+ ±1 µA MAX1771C/E 85 100 115 Current-Limit Trip Level VCS V+ = 5V to 16V mV MAX1771M 75 100 125 CS Input Current 0.01 ±1 µA EXT Rise Time V+ = 5V, 1nF from EXT to ground 55 ns EXT Fall Time V+ = 5V, 1nF from EXT to ground 55 ns
Note 1:
Output voltage guaranteed using preset voltages. See Figures 4a–4d for output current capability versus input voltage.
Note 2:
Output voltage line and load regulation depend on external circuit components.
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT LOAD CURRENT vs. (BOOTSTRAPED MODE) (NON-BOOTSTRAPED MODE) MINIMUM START-UP INPUT VOLTAGE
100 100 02 700 – 95 V VOUT = 12V, CIRCUIT OF FIGURE 2a IN = 10V 95 600 MAX1771–01 VIN =10V MAX1771 MAX1771-TOC3 EXTERNAL FET THRESHOLD 90 V 90 LIMITS FULL-LOAD START-UP ) IN = 8V ) 500 % % V BELOW 3.5V IN = 8V 85 85 400 V 80 IN = 3V 80 VIN = 5V 300 75 EFFICIENCY ( V 75 IN = 5V EFFICIENCY ( 70 70 LOAD CURRENT (mA) 200 VOUT = 12V VOUT = 12V 65 CIRCUIT OF 65 CIRCUIT OF 100 FIGURE 2a FIGURE 2b 60 60 0 1 10 100 1000 10,000 1 10 100 1000 10,000 2.00 2.25 2.50 2.75 3.00 3.25 3.50 LOAD CURRENT (mA) LOAD CURRENT (mA) MINIMUM START-UP INPUT VOLTAGE (V) Maxim Integrated 3