Datasheet LTC7151S (Analog Devices) - 4

LTC7151S
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, VOUT = 1.0V, unless otherwise noted. Efficiency vs Load Current Efficiency vs Load Current 1MHz, Efficiency vs Load Current 2MHz, 500kHz CCM , CCM CCM CCM
100 100 100 SVIN = 5V, PVIN = 12V SVIN = 5V, PVIN = 12V SVIN = 5V, PVIN = 12V L = 0.33µH (DCR = 0.37mΩ) L = 0.25µH (DCR = 0.37mΩ) L = 0.15µH (DCR = 0.37mΩ) 95 95 95 90 90 90 85 85 85 EFFICIENCY (%) 80 EFFICIENCY (%) 80 EFFICIENCY (%) 80 V 75 OUT = 1.0V 75 VOUT = 1V 75 V V OUT = 1V OUT = 1.2V VOUT = 1.2V V V OUT = 1.2V OUT = 1.5V VOUT = 1.5V V 70 70 OUT = 1.5V 70 0 3 6 9 12 15 0 3 6 9 12 15 0 3 6 9 12 15 IOUT (A) IOUT (A) IOUT (A) 7151S G01 7151S G02 7151S G03
Efficiency vs Load Current 1MHz, DCM Efficiency vs PVIN Efficiency vs Frequency
100 100 100 SVIN = 5V, PVIN = 12V 90 L = 0.25µH 95 95 80 70 90 90 60 50 85 85 40 EFFICIENCY (%) EFFICIENCY (%) 80 EFFICIENCY (%) 80 30 SVIN = 5V L = 0.15µH (DCR = 0.37mΩ) 20 VOUT = 1V 75 75 V 10 OUT = 1.2V IOUT = 8A IOUT = 8A VOUT = 1.5V IOUT = 15A IOUT = 15A 0 70 70 0.001 0.01 0.1 1 10 100 4 6 8 10 12 14 16 18 20 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 LOAD CURRENT (A) PVIN (V) FREQUENCY (MHz) 7151S G04 7151S G05 7151S G06
SVIN Current vs Frequency, CCM Load Regulation vs Load Current Shutdown Current vs VIN Shutdown Current vs V
120 1.00 30 0.75 100 25 0.50 80 20 0.25 (%) (mA) 60 OUT 0 /V (µA) 15 I Q I SVIN OUT –0.25 40 ∆V 10 –0.50 20 5 SV –0.75 IN = 5V DCM L = 0.15µH CCM 0 –1.00 0 0 0.5 1 1.5 2 2.5 3 0 3 6 9 12 15 0 4 8 12 16 20 FREQUENCY (MHz) IOUT (A) VIN (V) 7151S G07 7151S G08 7151S G09 Rev. 0 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Photo Typical Application Related Parts