Datasheet LTC3789 (Analog Devices) - 7

LTC3789
Typical perForMance characTerisTics TA = 25°C unless otherwise noted. Maximum Current Sense Maximum Current Sense Maximum Current Limit Threshold vs Duty Factor (Boost) Threshold vs Duty Factor (Buck) vs Temperature
150 150 150 BOOST 140 140 140 130 130 130 120 120 120 110 110 110 100 100 100 90 90 BUCK 90 CURRENT LIMIT (mV) 80 CURRENT LIMIT (mV) 80 70 70 80 MAXIMUM CURRENT LIMIT (mV) 60 60 70 50 50 60 0 20 40 60 80 100 0 20 40 60 80 100 –50 –30 –10 10 30 50 70 90 110 130 DUTY FACTOR (%) DUTY FACTOR (%) TEMPERATURE (°C) 3789 G19 3789 G20 3789 G21
Peak Current Threshold Valley Current Threshold vs VITH (Boost) vs VITH (Buck) Current Foldback Limit
200 200 160 150 140 BOOST 150 100 120 100 50 100 BUCK 0 50 80 –50 60 0 CURRENT LIMIT (mV) CURRENT LIMIT (mV) CURRENT LIMIT (mV) –100 40 –50 –150 20 –200 –100 0 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 2.5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 VITH (V) VITH (V) 3789 G23 V 3789 G22 FB (V) 3789 G24 3789fc For more information www.linear.com/LTC3789 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts