Datasheet MAX756, MAX757 (Maxim) - 3

MAX756/MAX757
3.3V/5V/Adjustable-Output, Step-Up DC-DC Converters __________________________________________Typical Operating Characteristics
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT MAXIMUM OUTPUT CURRENT 3.3V OUTPUT MODE 5V OUTPUT MODE vs. INPUT VOLTAGE
90 90 800 V V IN = 3.3V IN = 2.0V MAX756-1 MAX756-2 MAX756-3 700 80 80 600 VIN = 1.2V VIN = 2.5V 500 5V MODE 70 70 VIN = 1.25V 3.3V MODE 400 60 60 EFFICIENCY (%) EFFICIENCY (%) 300 200 50 50 MAXIMUM OUTPUT CURRENT (mA) 100 40 40 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0 1 2 3 4 5 LOAD CURRENT (mA) LOAD CURRENT (mA) INPUT VOLTAGE (V)
SWITCHING FREQUENCY QUIESCENT CURRENT SHUTDOWN QUIESCENT CURRENT vs. LOAD CURRENT vs. INPUT VOLTAGE vs. INPUT VOLTAGE
1M 500 50 MAX756-6 MAX756-4 MAX756-5 CURRENT MEASURED AT VIN μA) CURRENT MEASURED AT VIN 100k 5V MODE 400 40 μA) 10k 300 V 30 OUT = 5V 3.3V MODE 1k 200 20 QUIESCENT CURRENT ( SWITCHING FREQUENCY (Hz) 100 100 10 V SHUTDOWN QUIESCENT CURRENT ( IN = 2.5V VOUT = 3.3V 0 10 0 10μ 100μ 1m 10m 100m 1 1 2 3 4 5 1 2 3 4 5 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V)
MINIMUM START-UP INPUT VOLTAGE REFERENCE VOLTAGE vs. LOAD CURRENT LOAD REGULATION
1.8 10 MAX756-7 MAX756-8 1.6 8 1.4 6 1.2 4 START-UP INPUT VOLTAGE (V) 1.0 VREF LOAD REGULATION (mV) 2 VOUT = 3.3V 3.3V MODE 0.8 0 1 10 100 1000 0 50 100 150 200 250 LOAD CURRENT (mA) LOAD CURRENT (μA) Maxim Integrated 3