Datasheet LTC4012-3 (Analog Devices) - 5

LTC4012-3 Typical perForMance characTerisTics
(TA = 25°C unless otherwise noted. L = IHLP-2525 6.8µH) Efficiency at DCIN = 20V, BAT = 8V Efficiency at DCIN = 20V, BAT = 12V
100 10000 100 10000 RSENSE = 33mΩ RSENSE = 33mΩ RIN = 3.01k RIN = 3.01k 95 POWER LOSS(mW) 95 EFFICIENCY POWER LOSS(mW) EFFICIENCY 90 POWER LOSS 1000 90 POWER LOSS 1000 EFFICIENCY (%) EFFICIENCY (%) 85 85 80 100 80 100 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 2.5 3 CHARGE CURRENT (A) CHARGE CURRENT (A) 4012-3 G01 4012-3 G02
Efficiency at DCIN = 20V, BAT = 16V VFB Line Regulation
100 10000 0.10 LTC4012-3 TEST CIRCUIT 0.08 EFFICIENCY 0.06 95 POWER LOSS(mW) 0.04 0.02 90 1000 0 POWER LOSS ERROR (%) –0.02 EFFICIENCY (%) V FB –0.04 85 –0.06 RSENSE = 33mΩ RIN = 3.01k –0.08 80 100 –0.10 0 0.5 1 1.5 2 2.5 3 5 10 15 20 25 30 CHARGE CURRENT (A) CLP (V) 4012-3 G03 4012-3 G04
FBDIV Pin RON vs Battery Voltage Battery Load Dump
300 CLP = BAT + 3V 275 (CLP ≥ 6V) 2A TAGE 250 /DIV) 12.1V 1A 225 Y VOL 1A 200 TTER (500mV 3A (Ω) BA RECONNECT 175 LOAD R ON STATE DISCONNECT 150 TIME (1ms/DIV) 4012-3 G06 CLP = 20V 125 VOUT = 12.3V 100 75 0 5 10 15 20 25 BAT (V) 4012-3 G05 40123fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Operation Applications Information Package Description Revision History Typical Application Related Parts