Datasheet LT1616 (Analog Devices) - 3

LT1616
W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency, VOUT = 5V Efficiency, VOUT = 3.3V Switch Voltage Drop
100 100 500 90 VIN = 8V 90 VIN = 5V VIN = 12V 400 V 80 IN = 12V 80 300 70 VIN = 24V 70 VIN = 20V 60 60 200 EFFICIENCY (%) EFFICIENCY (%) 50 50 SWITCH VOLTAGE (mV) 100 40 40 30 30 0 0 100 200 300 400 500 0 100 200 300 400 500 0 200 400 600 LOAD CURRENT (mA) LOAD CURRENT (mA) SWITCH CURRENT (mA) 1616 G01 1616 G02 1616 G03
Maximum Load Current Maximum Load Current at VOUT = 5V at V BOOST Pin Current OUT = 3.3V
500 500 16 L = 15µH L = 10µH 14 400 400 12 L = 10µH L = 4.7µH 10 L = 6.8µH 300 300 OUTPUT LIMITED 8 BY DISSIPATION OUTPUT LIMITED 6 BY DISSIPATION LOAD CURRENT (mA) LOAD CURRENT (mA) 200 200 BOOST PIN CURRENT (mA) 4 2 100 100 0 0 5 10 15 20 25 0 5 10 15 20 25 0 200 400 600 INPUT VOLTAGE (V) INPUT VOLTAGE (V) SWITCH CURRENT (mA) 1616 G04 1616 G05 1616 G06
Switch Current Limit Feedback Pin Voltage Undervoltage Lockout
1000 1.27 3.7 3.6 800 1.26 TYPICAL 3.5 600 1.25 MINIMUM 3.4 400 1.24 3.3 FEEDBACK PIN VOLTAGE (V) SWITCH CURRENT LIMIT (mA) 200 1.23 UNDERVOLTAGE LOCKOUT (V) 3.2 0 1.22 3.1 0 20 40 60 80 100 –50 –25 0 25 50 75 100 –50 –25 0 25 50 75 100 DUTY CYCLE (%) TEMPERATURE (°C) TEMPERATURE (°C) 1616 G07 1616 G08 1616 G11 3