Datasheet MAX1951 (Analog Devices) - 5

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators MAX1951/MAX1952 Typical Operating Characteristics
(Typical values are at VIN = VCC = 5V, VOUT = 1.5V, IOUT = 1.5A, and TA = +25°C, unless otherwise noted. See Figure 2.)
EFFICIENCY vs. LOAD CURRENT EFFICIENCY vs. LOAD CURRENT REF VOLTAGE (VCC = VIN = 5V) (VCC = VIN = 3.3V) vs. REF OUTPUT CURRENT
100 100 1.995 VOUT = 3.3V VOUT = 2.5V 90 90 1.994 MAX 1951 toc01 80 MAX 1951 toc02 80 MAX1951 toc03 70 V V 70 OUT = 1.8V TA = +85°C OUT = 2.5V 1.993 TA = +25°C 60 60 VOUT = 1.5V 50 VOUT = 1.5V 50 1.992 40 40 EFFICIENCY (%) EFFICIENCY (%) REF VOLTAGE (V) 30 30 1.991 V V OUT = 0.8V OUT = 0.8V 20 20 TA = -40°C 1.990 10 10 0 0 1.989 10 100 1000 10,000 10 100 1000 10,000 0 5 10 15 20 25 30 35 40 LOAD CURRENT (mA) LOAD CURRENT (mA) REF OUTPUT CURRENT (μA)
SWITCHING FREQUENCY OUTPUT VOLTAGE DEVIATION vs. INPUT VOLTAGE vs. LOAD CURRENT
1.20 6 5 1.15 4 MAX1951 toc04 T MAX1951 toc05 A = +85°C 1.10 3 2 VOUT = 2.5V 1.05 VOUT = 3.3V 1 1.00 0 -1 0.95 TA = +25°C -2 VOUT = 0.8V VOUT = 1.8V 0.90 -3 SWITCHING FREQUENCY (MHz) TA = -40°C OUTPUT VOLTAGE DEVIATION (mV) -4 0.85 -5 0.80 -6 2.6 3.1 3.6 4.1 4.6 5.1 5.6 0 0.4 0.8 1.2 1.6 INPUT VOLTAGE (V) LOAD CURRENT (A)
LOAD-TRANSIENT RESPONSE LOAD-TRANSIENT RESPONSE
MAX1951 toc06 MAX1951 toc07 OUTPUT VOLTAGE: OUTPUT VOLTAGE: 100mV/div, 100mV/div, AC-COUPLED AC-COUPLED OUTPUT CURRENT: OUTPUT CURRENT: 0.5A/div 0.5A/div VIN = 5V VIN = 3.3V 0A V 0A OUT = 2.5V VOUT = 1.5V IOUT = 0.5 TO 1A IOUT = 0.5 TO 1A 40μs/div 40μs/div
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