Datasheet MAX1684, MAX1685 (Maxim) - 5

Low-Noise, 14V Input, 1A, PWM Step-Down Converters MAX1684/MAX1685 Typical Operating Characteristics
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
MAX1684 MAX1684 MAX1684 EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT (VIN = 3.3V, VOUT = 1.8V, 2.5V) (VOUT = 3.3V) (VOUT = 3.3V, PWM MODE)
100 100 100 A C 90 90 90 80 80 80 MAX1684/85 toc01 MAX1684/85 toc02 B MAX1684/85 toc03 D C A 70 A 70 70 D D 60 60 60 B 50 C E 50 50 40 B 40 EFFICIENCY (%) A: V 40 OUT = 2.5V LP MODE EFFICIENCY (%) EFFICIENCY (%) 30 F B: VOUT = 1.8V LP MODE 30 30 C: V A: V A: V OUT = 2.5V NORM MODE IN = 4V LP MODE IN = 4V 20 D: V 20 B: V 20 B: V OUT = 1.8V NORM MODE IN = 12V LP MODE IN = 5V C: V 10 E: V C: V OUT = 2.5V PWM MODE 10 IN = 4V NORMAL MODE 10 IN = 9V F: V D: V D: V OUT = 1.8V PWM MODE IN = 12V NORMAL MODE IN = 12V 0 0 0 0.1 1 10 100 1000 10,000 0.1 1 10 100 1000 10,000 1 10 100 1000 10,000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA)
MAX1684 MAX1684 MAX1685 EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT (VOUT = 5V) (VOUT = 5V, PWM MODE) (VOUT = 3.3V, PWM MODE)
100 100 100 D 90 90 B 90 A E V 80 IN = 4V E 80 MAX1684/85 toc04 80 MAX1684/85 toc06 C MAX1684/85 toc05 A 70 70 F 70 60 60 VIN = 5V 60 50 50 B 40 EFFICIENCY (%) 50 A: V 40 C IN = 6V LP MODE EFFICIENCY (%) EFFICIENCY (%) VIN = 9V B: VIN = 9V LP MODE 30 30 40 C: VIN = 12V LP MODE 20 D: V 20 A: V IN = 6V NORMAL MODE IN = 6V VIN = 12V 30 E: V B: V IN = 9V NORMAL MODE IN = 9V 10 10 F: V C: V IN = 12V NORMAL MODE IN =12V 20 0 0 0.1 1 10 100 1000 10,000 1 10 100 1000 10,000 1 10 100 1000 10,000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA)
MAX1685 MAX1685 MAX1685 EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT (V (V (V OUT = 3.3V) OUT = 5V PWM MODE) OUT = 5V)
100 100 100 C A B 90 A 90 90 80 80 80 E D MAX1684/85 toc07 MAX1684/85 toc08 MAX1684/85 toc09 C F D VIN = 6V 70 B 70 V 70 IN = 9V 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) A: VIN = 6V LP MODE 30 30 30 B: VIN = 9V LP MODE A: V C: V IN = 4V LP MODE IN = 12V LP MODE 20 20 VIN =12V 20 B: V D: V IN = 12V LP MODE IN = 6V NORMAL MODE 10 C: V E: V IN = 4V NORMAL MODE 10 10 IN = 9V NORMAL MODE D: V F: V IN = 12V NORMAL MODE IN =12V NORMAL MODE 0 0 0 0.1 1 10 100 1000 10,000 1 10 100 1000 10,000 0.1 1 10 100 1000 10,000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA)
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