Datasheet LT1513, LT1513-2 (Analog Devices) - 4

LT1513/LT1513-2
W U TYPICAL PERFORMANCE CHARACTERISTICS Switch Saturation Voltage Switch Current Limit Minimum Input Voltage vs Switch Current vs Duty Cycle vs Temperature
1.0 6 3.0 150°C 0.9 100°C 25°C 5 2.8 0.8 25°C AND 0.7 4 125°C 2.6 0.6 –55°C 0.5 3 2.4 –55°C 0.4 2 2.2 0.3 INPUT VOLTAGE (V) SWITCH CURRENT LIMIT (A) 0.2 1 2.0 SWITCH SATURATION VOLTAGE (V) 0.1 0 0 1.8 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 0 10 20 30 40 50 60 70 80 90 100 –50 –25 0 25 50 75 100 125 150 SWITCH CURRENT (A) DUTY CYCLE (%) TEMPERATURE (°C) LT1513 • G01 LT1513 • G02 LT1513 • G03
Output Charging Characteristics Negative Feedback Input Current Showing Constant-Current and vs Temperature Constant-Voltage Operation
0 12 µA) MAXIMUM AVAILABLE VIN = 12V CHARGING CURRENT 10 –10 WITH 12V INPUT 8 (A) 8.4V BATTERY –20 (A) (B) ICHRG = 0.5A 6 (B) 8.4V BATTERY I –30 CHRG = 1A 4 (C) 4.2V BATTERY BATTERY VOLTAGE (V) ICHRG = 1.5A (C) –40 2 NEGATIVE FEEDBACK INPUT CURRENT ( –50 0 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 TEMPERATURE (°C) CHARGING CURRENT (A) LT1513 • G06 1513 G07
Minimum Peak-to-Peak Feedback Input Current Synchronization Voltage vs Temperature vs Temperature
) 3.0 800 P-P fSYNC = 700kHz VFB = VREF 700 2.5 600 2.0 500 1.5 400 300 1.0 200 0.5 FEEDBACK INPUT CURRENT (nA) 100 MINIMUM SYNCHRONIZATION VOLTAGE (V 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) LT1513 • G04 LT1513 • G05 sn1513 1513fas 4