Datasheet LTC3709 (Analog Devices) - 5

LTC3709
W U TYPICAL PERFOR A CE CHARACTERISTICS Start-Up Continuous Current Mode (CCM) Discontinuous Current Mode (DCM)
VRUN/SS 5V/DIV VOUT 1V/DIV SW1 SW1 5V/DIV I 5V/DIV L1 10A/DIV SW2 SW2 I 1V/DIV L2 5V/DIV 10A/DIV 3709 G01 3709 G02 1ms/DIV 2µs/DIV 3709 G03 10µs/DIV
Transient Response (CCM) Transient Response (DCM) Efficiency vs Load Current
100 I V LOAD ILOAD IN = 12V 3A-18A 3A-18A 95 VOUT = 1.5V f = 220kHz 90 VOUT VOUT 50mV/DIV 50mV/DIV 85 80 VSW1 VSW1 20V/DIV 20V/DIV 75 70 VSW2 VSW2 EFFICIENCY (%) 20V/DIV 20V/DIV 65 60 3709 G04 3709 G05 20µs/DIV 20µs/DIV 55 50 10 100 1000 10000 100000 LOAD (mA) 3709 G06
Power Loss vs Load Current Efficiency vs V Quiescent Current at V IN CC = 5V
10 100 3.0 VIN = 12V VOUT = 1.5V VOUT = 1.5V ILOAD = 10A f = 220kHz f = 220kHz 2.8 1 95 2.6 0.1 90 2.4 POWER LOSS (W) EFFICIENCY (%) 0.01 85 QUIESCENT CURRENT (mA) 2.2 0.001 80 2.0 10 100 1000 10000 100000 4 8 12 16 20 24 –40 –20 0 20 40 60 80 LOAD CURRENT (mA) V TEMPERATURE (°C) IN (V) 3709 G07 3709 G08 3709 G09 3709fb 5